AMENDED
                    CERTIFICATE OF DESIGNATIONS, PREFERENCES
               AND RIGHTS OF SERIES F CONVERTIBLE PREFERRED STOCK
                                       OF
                               IMMUNOMEDICS, INC.

         Immunomedics,   Inc.  (the  "Company"),  a  corporation  organized  and
existing under the General Corporation Law of the State of Delaware, does hereby
certify that, pursuant to authority conferred upon the Board of Directors of the
Company by the Certificate of  Incorporation,  as amended,  of the Company,  and
pursuant to Section 151 of the General Corporation Law of the State of Delaware,
(A) on  December  7,  1998  the  Company  filed a  Certificate  of  Designation,
designating  the  preferences  and rights of the Series F Convertible  Preferred
Stock  (the  "Original  Designation"),  (B) as of the date  hereof  no shares of
preferred  stock have been issued  pursuant to the Original  Designation and (C)
the Board of Directors of the Company at a meeting duly held adopted resolutions
(i) authorizing a series of the Company's previously authorized preferred stock,
par value $.01 per share, and (ii) providing for the  designations,  preferences
and relative,  participating,  optional or other rights, and the qualifications,
limitations  or  restrictions  thereof,  of 2,000 shares of Series F Convertible
Preferred  Stock of the Company  (which  shall  amend and  restate the  Original
Designation), as follows:
                  RESOLVED, that the Company is authorized to issue 2,000 shares
         of Series F Convertible  Preferred Stock (the "Preferred Shares"),  par
         value  $.01  per  share,   which  shall  have  the  following   powers,
         designations, preferences and other special rights:

               (1) Dividends. The Preferred Shares shall not bear and dividends.

               (2) Holder's   Conversion  of  Preferred  Shares.   A  holder  of
Preferred Shares shall have the right, at such holder's  option,  to convert the
Preferred  Shares into shares of the Company's  common stock, par value $.01 per
share (the "Common Stock"), on the following terms and conditions:

                           (a)      Conversion Right.  Subject to Section  2(j),
at any time or times on or after  the  Issuance  Date (as  defined  below),  any
holder of  Preferred  Shares  shall be entitled  to convert any whole  number of
Preferred  Shares  into  fully paid and  nonassessable  shares  (rounded  to the



nearest  whole share in accordance  with Section  2(h)) of Common Stock,  at the
Conversion Rate (as defined below);  provided,  however,  that in no event shall
any holder be entitled to convert  Preferred  Shares in excess of that number of
Preferred Shares which,  upon giving effect to such conversion,  would cause the
aggregate number of shares of Common Stock  beneficially owned by the holder and
its  affiliates  to exceed 4.99% of the  outstanding  shares of the Common Stock
following such conversion.  For purposes of the foregoing proviso, the aggregate
number of  shares  of Common  Stock  beneficially  owned by the  holder  and its
affiliates  shall  include the number of shares of Common  Stock  issuable  upon
conversion of the Preferred  Shares with respect to which the  determination  of
such  proviso is being  made,  but shall  exclude the number of shares of Common
Stock which would be issuable upon (i) conversion of the remaining, nonconverted
Preferred Shares  beneficially owned by the holder and its affiliates,  and (ii)
exercise or conversion of the  unexercised or  unconverted  portion of any other
securities of the Company (including,  without limitation, any warrants) subject
to a limitation on conversion or exercise analogous to the limitation  contained
herein beneficially owned by the holder and its affiliates.  Except as set forth
in the  preceding  sentence,  for  purposes  of this  Section  2(a),  beneficial
ownership shall be calculated in accordance with Section 13(d) of the Securities
Exchange Act of
1934, as amended.

                           (b)      Conversion   Rate.   The  number  of  shares
of  Common  Stock  issuable  upon  conversion  of each of the  Preferred  Shares
pursuant to Sections (2)(a) and 2(g) and Section 5 shall be determined according
to the following formula (the
"Conversion Rate"):

                                Conversion Amount
                                Conversion Price

         For purposes of this Certificate of  Designations,  the following terms
shall have the following meanings:

                                    (i)     "Conversion  Price" means,  on a per
share  basis,  as of the  Conversion  Date (as  defined  below) or other date of
determination  of the applicable  Preferred  Shares (A) the Variable  Conversion
Price (as defined  below) when the  Variable  Conversion  Price is less than the
Trigger Price (as defined below) provided, however, that prior to the date which
is the earlier of ((alpha)) 365 days after the Initial Issuance Date (as defined
below) and ((beta)) a date on which a Triggering  Event, a Major  Transaction or
the public  announcement of a pending Major  Transaction (each as defined below)
occur, if the Variable Conversion Price on a Conversion Date is greater than 90%
of the Initial Fixed Price (as defined  below) and less than the Trigger  Price,
then the Conversion  Price shall equal the Trigger Price,  (B) the Trigger Price
when the Variable Conversion Price is equal to or greater than the Trigger Price
and less than or equal to 150% of the  Trigger  Price or (C) the  Profit-Sharing
Conversion  Price (as  defined  below)  when the  Variable  Conversion  Price is
greater than 150% of the Trigger Price;

                                    (ii) "Variable  Conversion  Price" means, as
of any date of  determination,  the average of the 15 lowest  Closing Bid Prices
(as defined  below) of the Common Stock during the 45  consecutive  trading days
immediately preceding a date of determination;

                                    (iii)   "Profit-Sharing   Conversion  Price"
means, as of any date of determination,  the amount determined  according to the
following formula:

                                       -2-


                        Profit-Sharing Conversion Price =
        Trigger Price + Variable Conversion Price -(1.5 x Trigger Price)
                        ________________________________________________
                                                2


                                    (iv)  "Conversion  Amount"  means,  on a per
share basis, the sum of (A) the
Additional  Amount (as defined  below),  unless the Company  has  exercised  its
option to pay such amount in cash, and (B) $10,000;

                                    (v)     "Additional Amount"  means, on a per
share  basis  the  result of the following formula:  (.04)(N/365)($10,000);

                                    (vi)   "Initial  Fixed  Price"  means,  with
respect to (A) Preferred  Shares issued on the Initial  Issuance Date (I) on any
date prior to the Fixed  Conversion  Price Trigger  Date,  $4.00 and (II) on any
Conversion Date on or after the Fixed  Conversion Price Trigger Date, the lesser
of the  average of the  Closing  Bid Prices for the Common  Stock  during the 20
consecutive  trading days  immediately  preceding (y) the Fixed Conversion Price
Trigger Date and (z) the date which is 180 days after the Initial  Issuance Date
or (B) Preferred  Shares issued after the Initial  Issuance Date, the average of
the Closing Bid Prices of the Common Stock during the five  consecutive  trading
days  immediately  preceding  the Put  Share  Notice  Date  (as  defined  in the
Securities Purchase  Agreement),  subject in each case to adjustment as provided
herein.  Notwithstanding the foregoing,  should there occur one or more Excluded
Redemption  Events (as  defined  in Section 3) which  results in a change to the
Initial Fixed Price of the Preferred  Shares as in effect  immediately  prior to
the  occurrence of such Excluded  Redemption  Events  pursuant to Section 3, the
Initial  Fixed Price shall mean the lesser of ((alpha))  the Initial Fixed Price
as defined  above and ((beta)) the Initial Fixed Price  following  such Excluded
Redemption as determined pursuant to Section 3.

                                    (vii)  "Trigger  Price"  means  125%  of the
Initial Fixed Price, as adjusted;

                                    (viii) "Fixed Conversion Price Trigger Date"
means, the earlier of (I) the
date  that  is 180  days  after  the  Initial  Issuance  Date  and  (II)  if the
stockholders  have not approved of the issuance of the Preferred  Shares and the
Conversion  Shares (as defined below) pursuant to Section 4(l) of the Securities
Purchase  Agreement  on or prior to the date which is 105 days after the Initial
Issuance Date, then the date which is 105 days after the Initial Issuance Date;

                                    (ix) "N" means the number of days from,  but
excluding, the Issuance Date
of the applicable  Preferred  Share through and including the Conversion Date or
the  Maturity  Date  for  the  Preferred  Shares  for  which  conversion  and/or
redemption is being elected, as the case may be;

                                    (x) "Issuance  Date" means,  with respect to
each Preferred Share, the date of issuance of the applicable Preferred Share;

                                      -3-


                                    (xi) "Initial Issuance Date" means the first
date on which any Preferred Shares are issued by the Company;

                                    (xii)  "Business  Day"  means  any day other
than Saturday,  Sunday or other day on which commercial banks in the City of New
York are authorized or required by law to remain closed;

                                    (xiii) "Securities Purchase Agreement" means
that certain  securities  purchase agreement between the Company and the initial
holders of the Preferred Shares;

                                    (xiv) "Registration  Rights Agreement" means
that certain  registration  rights agreement between the Company and the initial
holders  of the  Preferred  Shares  relating  to the  filing  of a  registration
statement covering the resale of the Conversion Shares;

                                    (xv)  "Conversion  Shares"  means  shares of
Common Stock  issuable  upon  conversion  of Preferred  Shares and any shares of
Common  Stock  issuable  as  Registration  Delay  Payments  (as  defined  in the
Registration Rights Agreement);

                                    (xvi)  "Closing  Bid Price"  means,  for any
security as of any date,  the last  closing  bid price for such  security on The
Nasdaq   National   Market   (as   reported   by  Bloomberg  Financial   Markets
("Bloomberg")),   or,   if  The   Nasdaq  National  Market is not the  principal
trading market for such security, the average of the high and low trading prices
on such date of such  security on the principal  securities  exchange or trading
market where such security is listed or traded (as reported by Bloomberg), or if
the  foregoing do not apply,  the average of the high and low trading  prices on
such date of such  security  in the  over-the-counter  market on the  electronic
bulletin board for such security (as reported by Bloomberg).  If the Closing Bid
Price  cannot  be  calculated  for  such  security  on  such  date on any of the
foregoing  bases,  the Closing Bid Price of such  security on such date shall be
the fair market value as mutually determined by the Company and the holders of a
majority of the  outstanding  Preferred  Shares  (including for purposes of this
determination  any Preferred  Shares with respect to which the Closing Bid Price
is being  determined).  If the Company and the holders of  Preferred  Shares are
unable  to agree  upon the fair  market  value of the  Common  Stock,  then such
dispute   shall  be   resolved   pursuant  to  Section   2(f)(iii).   (All  such
determinations to be appropriately adjusted for any stock dividend,  stock split
or other similar transaction during such period);

                           (c)      Company's Option to Pay Additional Amount in
Cash.   Upon   conversion   pursuant to Sections 2(a) or 2(g)  or Section 5, the
Company shall have the right to elect to pay the  Additional  Amount in cash, in
lieu of conversion to Common Stock.  If the Company elects to pay the Additional
Amount in cash, such cash shall be paid  simultaneously with the delivery to the
holder  of  the  certificates   representing  the  Common  Stock  issuable  upon
conversion in accordance with Section 2(f) or upon the credit to the holder's or
its designees  account with the Depository  Trust Company.  In order to exercise
its right to pay any  Additional  Amount in cash,  the Company  must advise each
holder of Preferred Shares in writing (the

                                      -4-


"Cash Dividend  Notice") that the Additional  Amount shall be paid in cash until
such time as the Company shall  terminate the Cash Dividend  Notice by providing
at least  five  Business  Days prior  written  notice of such  termination  (the
"Termination  Notice").  The Cash Dividend  Notice shall set forth the effective
date of the Cash  Dividend  Notice,  which date shall be at least five  Business
Days after the date the Cash  Dividend  Notice is deemed to have been  delivered
pursuant to Section 20. The  Termination  Notice shall be effective on the fifth
Business  Day  after  the date the  Termination  Notice  is  deemed to have been
delivered  pursuant to Section 20 unless a later date shall be  specified in the
Termination Notice.

                           (d)      Adjustment to Conversion  Price --  Dilution
and Other Events.  In order to prevent dilution of the rights granted under this
Certificate of Designations, the Initial Fixed Prices, the Trigger Price and the
Conversion  Price will be subject to adjustment from time to time as provided in
this Section 2(d).

                                    (i)     Adjustment  of Initial  Fixed  Price
upon  Issuance of Common  Stock. Except as provided in Section 2(d)(iv),  if and
whenever on or after the Initial Issuance Date, the Company issues or sells,  or
is  deemed  to  have  issued or sold,  any  shares  of  Common Stock (other than
Preferred  Shares or shares of Common Stock issued upon  conversion of Preferred
Shares  or  deemed  to  have been issued by the  Company in  connection  with an
Approved  Stock Plan (as defined  below) or the Excluded  Securities (as defined
below)) for a consideration per share less than a price (the "Applicable Price")
equal to a Trigger Price in effect  immediately  prior to such issuance or sale,
then  immediately  after such issue or sale,  the  Initial  Fixed  Price then in
effect, which relates to such Trigger Price, shall be reduced to an amount equal
to (a) if such  issuance  or sale or deemed  issuance or sale was for a security
which has both a Variable  Price (as defined  below) and a Set Price (as defined
below) component and the holders of the Preferred Shares either did not exercise
their  rights to  participate,  or were  excluded  from  participating,  in such
issuance or sale pursuant to Section 4(g) of the Securities  Purchase Agreement,
then the product of (A) .80 and (B) such  consideration  per share  received and
(b) if such issuance or sale or deemed issuance or sale was for a security other
than as described in the immediately  preceding  clause (a), then the product of
(y) the Initial  Fixed Price in effect  immediately  prior to such issue or sale
and (z) the  quotient  determined  by dividing (1) the sum of (I) the product of
the Applicable Price and the number of shares of Common Stock Deemed Outstanding
(as  defined  below)  immediately  prior to such  issue  or  sale,  and (II) the
consideration,  if  any,  received  by the  Company  upon  such  issue  or  sale
(excluding the consideration  received or to be received from the holders of the
Preferred Shares pursuant to the exercise of their right to participate pursuant
to Section 4(g) of the Securities Purchase Agreement), by (2) the product of (I)
the  Applicable  Price and (II) the  number of  shares  of Common  Stock  Deemed
Outstanding  immediately after such issue or sale (excluding those shares issued
or deemed to be issued to the holders of the  Preferred  Shares  pursuant to the
exercise  of  their  right  to  participate  pursuant  to  Section  4(g)  of the
Securities Purchase Agreement). For purposes of determining the adjusted Initial
Fixed Price under this Section 2(d)(i), the following shall be applicable:

                                            (A)      Issuance  of  Options.   If
          and whenever on or after the Initial Issuance Date, the Company in any
          manner  grants any rights or options to  subscribe  for or to purchase
          Common  Stock (other than the  Excluded  Securities  or pursuant to an
          Approved Stock Plan or upon conversion of the Preferred Shares) or any
          stock or other securities  convertible into or exchangeable for Common

                                      -5-


          Stock (such rights or options being herein  called  "Options" and such
          convertible or  exchangeable  stock or securities  being herein called
          "Convertible  Securities")  and the price  per share for which  Common
          Stock is issuable upon the exercise of such Options or upon conversion
          or exchange of such Convertible Securities is less than the Applicable
          Price,  then the total  maximum  number  of  shares  of  Common  Stock
          issuable  upon the  exercise  of such  Options or upon  conversion  or
          exchange of the total maximum  amount of such  Convertible  Securities
          issuable  upon the exercise of such Options at the time of issuance of
          such Options (without regard to limitations on exercise, conversion or
          exchange)  shall be deemed to be  outstanding  and to have been issued
          and sold by the Company for such price per share. For purposes of this
          Section  2(d)(i)(A),  the "price per share for which  Common  Stock is
          issuable upon exercise of such Options or upon  conversion or exchange
          of such  Convertible  Securities"  is  determined  by dividing (I) the
          total  amount,  if any,  received  or  receivable  by the  Company  as
          consideration  for the  granting  of such  Options,  plus the  minimum
          aggregate  amount of additional  consideration  payable to the Company
          upon the  exercise of all such Options at the time of issuance of such
          Options  (without  regard to  limitations  on exercise,  conversion or
          exchange),   plus  in  the  case  of  such  Options  which  relate  to
          Convertible  Securities,  the minimum  aggregate  amount of additional
          consideration,  if any,  payable to the Company  upon the  issuance or
          sale of such  Convertible  Securities  and the  conversion or exchange
          thereof,  by (II) the total  maximum  number of shares of Common Stock
          issuable upon exercise of such Options at the time of issuance of such
          Options  (without  regard to  limitations  on exercise,  conversion or
          exchange) or upon the  conversion or exchange of all such  Convertible
          Securities  issuable upon the exercise of such Options.  Except as set
          forth in Section  2(d)(i)(C) below, no adjustment of the Initial Fixed
          Prices shall be made upon the actual  issuance of such Common Stock or
          of such  Convertible  Securities  upon the exercise of such Options or
          upon the actual  issuance  of such  Common  Stock upon  conversion  or
          exchange of such Convertible Securities.


                                            (B)      Issuance   of   Convertible
          Securities. If and whenever on or after the Initial Issuance Date, the
          Company in any manner issues or sells any  Convertible  Securities and
          the  price per share for  which  Common  Stock is  issuable  upon such
          conversion  or exchange is less than the  Applicable  Price,  then the
          maximum number of shares of Common Stock  issuable upon  conversion or
          exchange  of such  Convertible  Securities  at the time of issuance of
          such  Convertible   Securities   (without  regard  to  limitations  on
          exercise,  conversion or exchange)  shall be deemed to be  outstanding
          and to have been  issued  and sold by the  Company  for such price per
          share.  For the  purposes of this Section  2(d)(i)(B),  the "price per
          share for which  Common  Stock is  issuable  upon such  conversion  or
          exchange" is determined  by dividing (I) the total amount  received or
          receivable  by the Company as  consideration  for the issue or sale of
          such  Convertible  Securities,  plus the minimum  aggregate  amount of
          additional  consideration,  if any,  payable to the  Company  upon the
          conversion  or  exchange  thereof  at the  time  of  issuance  of such
          Convertible  Securities  (without  regard to  limitations on exercise,
          conversion or exchange), by (II) the total maximum number of shares of
          Common  Stock  issuable  upon the  conversion  or exchange of all such
          Convertible  Securities  at the time of issuance  of such  Convertible
          Securities  (without regard to limitations on exercise,  conversion or
          exchange).  Except  as set  forth  in  Section  2(d)(i)(C)  below,  no

                                      -6-


          adjustment  of an Initial  Fixed  Prices shall be made upon the actual
          issue  of such  Common  Stock  upon  conversion  or  exchange  of such
          Convertible  Securities,  and  if any  such  issue  or  sale  of  such
          Convertible  Securities is made upon exercise of any Options for which
          adjustment  of an  Initial  Fixed  Prices  had  been or are to be made
          pursuant  to other  provisions  of this  Section  2(d)(i),  no further
          adjustment  of such  Initial  Fixed  Prices shall be made by reason of
          such issue or sale.

                                            (C)      Change   in   Option  Price
          or Rate of  Conversion.  If the  purchase  price  provided  for in any
          Options, the additional consideration, if any, payable upon the issue,
          conversion or exchange of any Convertible  Securities,  or the rate at
          which any Convertible  Securities are convertible into or exchangeable
          for Common  Stock change at any time,  the Initial  Fixed Price of any
          Preferred  Shares  in  effect  at the  time of such  change  shall  be
          readjusted  to the Initial Fixed Price which would have been in effect
          at  such  time  had  such  Options  or  Convertible  Securities  still
          outstanding  provided  for such  changed  purchase  price,  additional
          consideration  or changed  conversion rate, as the case may be, at the
          time initially  granted,  issued or sold;  provided that no adjustment
          shall be made if such  adjustment  would result in an increase of such
          Initial Fixed Price then in effect.

                                            (D)      Certain  Definitions.   For
          purposes of  determining  the adjusted  Initial Fixed Price under this
          Section  2(d)(i),  the  following  terms have the  meanings  set forth
          below:
                                                     (I)   "Approved Stock Plan"
          shall mean any  contract,  plan or agreement  which is approved by the
          Board of  Directors of the  Company,  pursuant to which the  Company's
          securities (including stock appreciation rights,  phantom stock rights
          or other rights with equity  features)  may be issued to any employee,
          officer, director, consultant or other service provider.

                                                     (II)   "Common Stock Deemed
          Outstanding"  means, at any given time, the number of shares of Common
          Stock actually  outstanding at such time, plus the number of shares of
          Common Stock deemed to be outstanding  pursuant to Sections 2(d)(i)(A)
          and 2(d)(i)(B) hereof regardless of whether the Options or Convertible
          Securities  are actually  exercisable  at such time, but excluding any
          shares of Common  Stock  issuable  upon  conversion  of the  Preferred
          Shares.

                                                     (III) "Excluded Securities"
          means any security of the Company  issued after  November 17, 1998 and
          prior to  December  31, 1998  pursuant to the terms of the  Structured
          Equity Line Flexible  Financing  Agreement,  between  Cripple Creek, a
          Delaware limited  liability company and the Company (as such agreement
          is attached to the Securities Purchase Agreement as Exhibit E).

                                                     (IV)  "Set  Price"   means,
          with respect to the  conversion,  exchange,  or exercise  price of any
          security,  a price which has the  possibility  of not varying with the
          market price of the Common Stock.

                                      -7-


                                            (E)      Effect  on   Initial  Fixed
          Price of Certain  Events.  For  purposes of  determining  the adjusted
          Initial Fixed Price under this Section 2(d)(i), the following shall be
          applicable:
                                                   (I)        Calculation     of
          Consideration  Received.  If any Common Stock,  Options or Convertible
          Securities  are  issued or sold or deemed to have been  issued or sold
          for cash, the consideration received therefor will be deemed to be the
          net amount received by the Company therefor plus actual legal expenses
          incurred  pursuant to such issuance or sale of up to $50,000.  In case
          any Common Stock, Options or Convertible Securities are issued or sold
          for a consideration  other than cash, the amount of the  consideration
          other than cash received by the Company will be the fair value of such
          consideration, except where such consideration consists of securities,
          in which case the amount of consideration received by the Company will
          be the average of the Closing  Bid Prices of such  securities  for the
          five  consecutive  trading  days  immediately  preceding  the  date of
          receipt. In case any Common Stock,  Options or Convertible  Securities
          are issued to the  owners of the  non-surviving  entity in  connection
          with any merger in which the  Company  is the  surviving  entity,  the
          amount of  consideration  therefor will be deemed to be the fair value
          of such  portion of the net assets and  business of the  non-surviving
          entity as is attributable to such Common Stock, Options or Convertible
          Securities,  as the case may be. The fair  value of any  consideration
          other  than  cash or  securities  will be  determined  jointly  by the
          Company  and the holders of a majority  of the  Preferred  Shares then
          outstanding.  If such parties are unable to reach agreement within ten
          (10) days after the  occurrence of an event  requiring  valuation (the
          "Valuation Event") the Company shall use its best efforts to cause the
          fair value of such  consideration to be determined  within 48 hours of
          the tenth (10th) day following the Valuation  Event by an independent,
          reputable appraiser selected by the Company,  which appraiser shall be
          reasonably  acceptable  to  two-thirds  (_)  of  the  holders  of  the
          Preferred Shares. The determination of such appraiser shall be binding
          upon all parties absent manifest error.

                                                   (II) Integrated Transactions.
          In case any Option is issued in  connection  with the issue or sale of
          other  securities of the Company,  together  comprising one integrated
          transaction  in which no specific  consideration  is allocated to such
          Options by the parties  thereto,  the  Options  will be deemed to have
          been   issued  for  a   consideration   of  $.01  and  the   aggregate
          consideration  received by the Company in such integrated  transaction
          shall be included in the  adjustment  calculation  in Section  2(d)(i)
          above.

                                                   (III) Treasury  Shares.   The
          number of shares of Common  Stock  outstanding  at any given time does
          not include shares owned or held by or for the account of the Company,
          and the  disposition of any shares so owned or held will be considered
          an issue or sale of Common Stock.

                                                    (IV)  Record  Date.  If  the
          Company  takes a record of the holders of Common Stock for the purpose

                                      -8-


          of  entitling  them (1) to  receive a dividend  or other  distribution
          payable in Common Stock, Options or in Convertible Securities,  or (2)
          to subscribe  for or purchase  Common  Stock,  Options or  Convertible
          Securities, then such record date will be deemed to be the date of the
          issue or sale of the shares of Common Stock deemed to have been issued
          or sold upon the  declaration  of such  dividend or the making of such
          other  distribution  or the  date of the  granting  of such  right  of
          subscription or purchase, as the case may be.

                                    (ii)  Adjustment of Initial Fixed Price upon
Subdivision  or  Combination  of  Common  Stock.    If  the  Company at any time
subdivides (by any stock split, stock dividend,  recapitalization  or otherwise)
one or more  classes of its  outstanding  shares of Common  Stock into a greater
number of shares,  each Initial Fixed Price in effect  immediately prior to such
subdivision will be proportionately reduced. If the Company at any time combines
(by  combination,  reverse stock split or otherwise)  one or more classes of its
outstanding shares of Common Stock into a smaller number of shares, each Initial
Fixed  Price  in  effect   immediately   prior  to  such   combination  will  be
proportionately increased.

                                    (iii)   Reorganization,    Reclassification,
Consolidation,   Merger   or   Sale.   Any   recapitalization,   reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Company's assets to another Person (as defined below) or other transaction which
is effected in such a way that  holders of Common  Stock are entitled to receive
(either  directly or upon subsequent  liquidation)  stock,  securities or assets
with  respect  to or in  exchange  for  Common  Stock is  referred  to herein as
"Organic  Change." Prior to the consummation of any Organic Change,  the Company
will make appropriate  provision (in form and substance reasonably  satisfactory
to the holders of a majority of the Preferred Shares then outstanding) to insure
that each of the holders of the Preferred  Shares will thereafter have the right
to acquire  and  receive in lieu of or in  addition  to (as the case may be) the
shares of Common Stock  otherwise  acquirable and receivable upon the conversion
of such holder's  Preferred Shares,  such shares of stock,  securities or assets
that would have been issued or payable in such Organic Change with respect to or
in  exchange  for the  number of shares of Common  Stock  which  would have been
acquirable and receivable upon the conversion of such holder's  Preferred Shares
had such  Organic  Change not taken  place  (without  taking  into  account  any
limitations or restrictions on the timing or amount of conversions). In any such
case,  the  Company  will  make  appropriate  provision  (in form and  substance
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares
then  outstanding)  with respect to such holders' rights and interests to insure
that the  provisions  of this Section 2(d) and Section 2(e) will  thereafter  be
applicable  to the  Preferred  Shares  (including,  in  the  case  of  any  such
consolidation, merger or sale in which the successor entity or purchasing entity
is other than the Company, an immediate  adjustment of each of the Initial Fixed
Prices  to the  value  for the  Common  Stock  reflected  by the  terms  of such
consolidation,  merger  or sale,  if the  value so  reflected  is less than such
Initial Fixed Price in effect immediately prior to such consolidation, merger or
sale and an immediate  revision to the Initial Fixed Prices to reflect the price
of the common stock of the surviving  entity and the market in which such common
stock is traded). The Company will not effect any such consolidation,  merger or
sale, unless prior to the consummation  thereof,  the successor entity (if other
than  the  Company)  resulting  from  consolidation  or  merger  or  the  entity
purchasing  such assets  assumes,  by written  instrument (in form and substance
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares

                                      -9-


then outstanding),  the obligation to deliver to each holder of Preferred Shares
such shares of stock,  securities or assets as, in accordance with the foregoing
provisions,  such  holder may be entitled  to  acquire.  "Person"  shall mean an
individual,  a limited  liability  company,  a partnership,  a joint venture,  a
corporation,  a trust, an  unincorporated  organization  and a government or any
department or agency thereof.

                                    (iv)    Adjustment  of  Variable  Conversion
Price  upon  Issuance  of  Convertible  Securities.  If  and  whenever after the
Issuance Date, the Company in any manner issues or sells Convertible  Securities
(other than  Excluded  Securities  or any  Convertible  Securities  issued in an
offering  with respect to which the holders of the  Preferred  Shares  purchased
Convertible  Securities  pursuant to their right to participate in such offering
pursuant  to  Section  4(g)  of the  Securities  Purchase  Agreement)  that  are
convertible  into or  exercisable  or  exchangeable  for Common Stock at a price
which may vary with the market  price of the Common Stock (the  formulation  for
such variable price being herein referred to as, the "Variable  Price") and such
Variable  Price is not  calculated  using the same formula used to calculate the
Variable  Conversion Price in effect immediately prior to the time of such issue
or sale,  the Company shall  provide  written  notice  thereof via facsimile and
overnight courier to each holder of the Preferred Shares ("Variable  Notice") on
the date of issuance of such Convertible Securities. If the holders of Preferred
Shares representing at least two-thirds of the Preferred Shares then outstanding
provide written notice via facsimile and overnight  courier (the "Variable Price
Election  Notice") to the Company  within five (5) Business  Days of receiving a
Variable  Notice that such  holders  desire to replace the  Variable  Conversion
Price then in effect with the Variable Price described in such Variable  Notice,
then from and after the date of the  Company's  receipt  of the  Variable  Price
Election Notice the Variable  Conversion  Price will  automatically  be replaced
with the Variable Price (together with such modifications to this Certificate of
Designations  as may be required to give full effect to the  substitution of the
Variable  Price  for  the  Variable   Conversion  Price),   subject  to  further
adjustments as provided in this Certificate of Designations. A holder's delivery
of a Variable Price Election Notice shall serve as the consent required to amend
this Certificate of Designations pursuant to Section 15 below. In the event that
a holder delivers a Conversion  Notice at any time after the Company's  issuance
of Convertible Securities with a Variable Price but before such holder's receipt
of the  Company's  Variable  Notice,  then such holder  shall have the option by
written  notice to the  Company  to have the  Conversion  Price be equal to such
Variable Price for the conversion  effected by such Conversion Notice,  provided
that  two-thirds  of the  preferred  shares then  outstanding  have elected such
Variable Price to replace the existing Variable Conversion Price.

                                    (v)     Certain  Events. If any event occurs
of  the  type  contemplated  by  the  provisions  of  this  Section 2(d) but not
expressly provided for by such provisions  (including,  without limitation,  the
granting of stock appreciation rights, phantom stock rights or other rights with
equity  features  other than  pursuant  to an  Approved  Stock  Plan),  then the
Company's  Board  of  Directors  will  make  an  appropriate  adjustment  in the
Conversion  Price so as to protect  the rights of the  holders of the  Preferred
Shares; provided,  however, that no such adjustment will increase the Conversion
Price as otherwise determined pursuant to this Section 2(d).

                                      -10-


                                    (vi)    Adjustment  of Initial  Fixed  Price
Upon Major  Corporate Event  Announcement.  In the event (A) the Company makes a
public announcement that it intends to consolidate or merge with or into another
Person or engage in a business combination involving the issuance or exchange of
more than the Trigger Percentage (as defined below) of the Company's outstanding
Common Stock,(B) the Company makes a public announcement that it intends to sell
or transfer all or substantially  all of the Company's assets, or (C) any Person
(including the Company) publicly announces a purchase,  tender or exchange offer
for more than the Trigger  Percentage of the Company's  outstanding Common Stock
(the  transactions  described in clauses (A), (B) and (C) above are  hereinafter
referred  to as  "Major  Corporate  Events"  and the  date  of the  announcement
referred  to in  clause  (A),  (B)  or  (C) is  hereinafter  referred  to as the
"Announcement  Date"),  then the Initial Fixed Prices shall,  effective upon the
Announcement Date and continuing  through and including the Adjusted  Conversion
Price  Termination  Date (as defined  below),  be equal to the Conversion  Price
which  would  have  been  applicable  for a  conversion  by  the  holder  on the
Announcement  Date.  From and after the Adjusted  Conversion  Price  Termination
Date, the Conversion Price shall be determined as set forth in Section 2(b). For
purposes hereof,  "Adjusted  Conversion Price Termination Date" shall mean, with
respect to any proposed Major Corporate Event for which a public announcement as
contemplated  by this Section  2(c)(vi)  has been made,  the date upon which the
Company  or other  Person  (in the case of  clause  (C)  above)  consummates  or
publicly  announces  the  termination  or  abandonment  of  the  proposed  Major
Corporate Event which was the subject of the previous public  announcement.  The
"Trigger Percentage" means the lesser of (I) 50% and (II) the greater of (y) 30%
and (z) the percentage of shares  outstanding held by David M. Goldenberg or his
spouse,  their  children  and  grandchildren  or any trust which has as the sole
beneficiary any or all of the above individuals.

                                    (vii) Notices.

                                            (A) As  soon as practicable,  but in
          no event later than one (1) day after any adjustment of the Conversion
          Price,  the Company will give written notice thereof to each holder of
          the  Preferred   Shares,   setting  forth  in  reasonable  detail  and
          certifying the calculation of such adjustment.

                                            (B) The  Company  will give  written
          notice to each holder of the  Preferred  Shares at least ten (10) days
          prior to the date on which  the  Company  closes  its books or takes a
          record  (I) with  respect to any  dividend  or  distribution  upon the
          Common Stock, (II) with respect to any pro rata subscription  offer to
          holders of Common Stock, or (III) for determining  rights to vote with
          respect to any Organic  Change,  dissolution or liquidation  and in no
          event  shall such  notice be  provided  to such  holder  prior to such
          information being made known to the public.

                                            (C)  The  Company   will  also  give
          written  notice to each  holder of the  Preferred  Shares at least ten
          (10) days prior to the date on which any Organic  Change,  dissolution
          or  liquidation  will take place and in no event  shall such notice be
          provided to such holder prior to such information  being made known to
          the public.

                                      -11-



                           (e)      Purchase   Rights.   In   addition   to  any
adjustments  of the  Conversion  Price  pursuant to Section 2(d), if at any time
after the Initial Issuance Date the Company grants, issues or sells any Options,
Convertible  Securities  or rights to purchase  stock,  warrants,  securities or
other  property pro rata to the record holders of any class of Common Stock (the
"Purchase Rights"), then the holders of the Preferred Shares will be entitled to
acquire,  upon the terms  applicable  to such  Purchase  Rights,  the  aggregate
Purchase  Rights which such holder  could have  acquired if such holder had held
the number of shares of Common Stock acquirable upon complete  conversion of the
Preferred Shares (without taking into account any limitations or restrictions on
the  timing or amount of  conversions)  immediately  before  the date on which a
record is taken for the grant,  issuance or sale of such Purchase Rights, or, if
no such record is taken,  the date as of which the record  holders of the Common
Stock are to be determined for the grant, issue or sale of such Purchase Rights.

                           (f)      Mechanics  of  Conversion.   Subject  to the
Company's  inability to fully satisfy its obligations  under a Conversion Notice
(as defined below) as provided for in Section 4:

                                    (i)     Holder's    Delivery   Requirements.
To convert  Preferred  Shares into full shares of Common  Stock on any date (the
"Conversion  Date"),  the holder  thereof  shall (A) transmit by  facsimile  (or
otherwise  deliver),  for receipt on or prior to 6:00 p.m. Eastern Time, on such
date,  a copy of a fully  executed  notice of  conversion  in the form  attached
hereto as Exhibit I (the  "Conversion  Notice") to the Company or its designated
transfer agent (the "Transfer Agent"), and (B) if required by Section 2(f)(vii),
surrender  to a  common  carrier,  for  delivery  to  the  Company  as  soon  as
practicable  following such date, the original  certificate(s)  representing the
Preferred Shares being converted (or an indemnification undertaking with respect
to such shares in the case of their loss, theft or destruction)  (the "Preferred
Stock  Certificate(s)").  Such holders of the  Preferred  Shares shall use their
best efforts to provide a copy of the  Conversion  Notice to Company  counsel on
the  Conversion  Date and verify by telephone  that the Company has received the
Conversion Notice on the Conversion Date, but the Company's obligations pursuant
to this Certificate of Designations and the Transaction Documents (as defined in
the Securities  Purchase Agreement)  including,  but not limited to this Section
2(f),  shall  remain  in full  force  and  effect  regardless  of such  holder's
compliance with the requirements of this sentence.

                                    (ii)    Company's Response.  Upon receipt by
the Company of a facsimile  copy of a Conversion  Notice,  the Company shall (A)
promptly,  but in no event later than 24 hours  after such  receipt,  send,  via
facsimile,  a confirmation of receipt of such  Conversion  Notice to such holder
and (B) on or before the second  Business  Day  following  the date of  receipt,
credit such aggregate number of shares of Common Stock to which the holder shall

                                     -12-


be  entitled  to the  holder's  or  its  designee's  balance  account  with  The
Depository  Trust Company;  provided,  however,  if the holder who submitted the
Conversion  Notice requested  physical  delivery of any or all of the Conversion
Shares,  then the Company  shall,  on or before the third Business Day following
receipt of the  Conversion  Notice,  issue and surrender to a common carrier for
overnight  delivery  to the  address  specified  in  the  Conversion  Notice,  a
certificate,  registered  in the name of the  holder  or its  designee,  for the
number of shares of Common Stock to which the holder shall be entitled  pursuant
to such request.  If the number of Preferred Shares represented by the Preferred
Stock  Certificate(s)  submitted  for  conversion  is greater than the number of
Preferred Shares being converted, then the Company shall, as soon as practicable
and in no event  later than two  Business  Days after  receipt of the  Preferred
Stock  Certificate(s) and at its own expense,  issue and deliver to the holder a
new Preferred Stock Certificate  representing the number of Preferred Shares not
converted.
                                    (iii)   Dispute  Resolution.  In the case of
a dispute as to the  determination  of the Closing  Bid Price or the  arithmetic
calculation  of the  Conversion  Rate,  the Company shall  promptly issue to the
holder  the  number of shares of Common  Stock  that is not  disputed  and shall
submit the disputed  determinations or arithmetic calculations to the holder via
facsimile  within two (2)  Business Day of receipt of such  holder's  Conversion
Notice.   If  such  holder  and  the  Company  are  unable  to  agree  upon  the
determination  of  the  Closing  Bid  Price  or  arithmetic  calculation  of the
Conversion  Rate within one (1) Business Day of such disputed  determination  or
arithmetic  calculation  being  submitted to the holder,  then the Company shall
within one (1) Business Day submit via facsimile (A) the disputed  determination
of the Closing Bid Price to an independent,  reputable  investment  bank, or (B)
the disputed  arithmetic  calculation of the Conversion Rate to its independent,
outside  accountant.  The  Company  shall  use its best  efforts  to  cause  the
investment  bank  or  the  accountant,  as the  case  may  be,  to  perform  the
determinations  or  calculations  and notify the  Company  and the holder of the
results no later than  forty-eight  (48)  hours  from the time it  receives  the
disputed determinations or calculations.  Such investment bank's or accountant's
determination  or  calculation,  as the case may be,  shall be binding  upon all
parties absent manifest error.

                                    (iv)   Record Holder.  The person or persons
entitled to receive the shares of Common Stock  issuable  upon a  conversion  of
Preferred  Shares  shall be treated  for all  purposes  as the record  holder or
holders of such shares of Common Stock on the Conversion Date.

                                    (v)    Company's Failure to Timely  Convert.
If within five  Business  Days after the  Company's or the Transfer  Agent's (as
applicable)  receipt of a facsimile  copy of a  Conversion  Notice,  the Company
shall fail to issue a  certificate  for the number of shares of Common  Stock to
which a holder is entitled or to credit the  holder's  balance  account with The
Depository  Trust Company for such number of shares of Common Stock to which the
holder is  entitled  upon such  holder's  conversion  of the  Preferred  Shares,
pursuant to Section 2(f)(ii),  in addition to all other available remedies which
such holder may pursue  hereunder and under the  Securities  Purchase  Agreement
(including indemnification pursuant to Section 8 thereof), the Company shall pay
additional  damages to such holder on each date after such fifth (5th)  Business
Day that such  conversion  is not timely  effected in an amount equal to 0.5% of
the product of (A) the sum of the number of shares of Common Stock not issued to
the holder on a timely  basis  pursuant  to Section  2(f)(ii)  and to which such
holder is entitled and (B) the Closing Bid Price of the Common Stock on the last
possible  date which the Company  could have  issued  such Common  Stock to such
holder without violating Section 2(f)(ii).

                                      -13-



                                    (vi)   Company's     Failure    to     Issue
Certificates.  If within ten Business  Days after the  Company's  receipt of the
Preferred  Stock  Certificates  to be converted  and the  Conversion  Notice the
Company shall fail to issue a new Preferred Stock  Certificate  representing the
number of Preferred Shares to which such holder is entitled, pursuant to Section
2(f)(ii),  in addition  to all other  available  remedies  which such holder may
pursue  hereunder  and  under  the  Securities  Purchase  Agreement   (including
indemnification pursuant to Section 8 thereof), the Company shall pay additional
damages to such holder on each date after such tenth  (10th)  Business  Day that
such delivery of such Preferred Stock  Certificates is not timely effected in an
amount  equal to 0.5% of the product of (A) the number of shares of Common Stock
issuable upon conversion of the Preferred  Shares  represented by such Preferred
Stock  Certificate  as of the last  possible  date which the Company  could have
issued such Preferred Stock Certificate to such holder without violating Section
2(f)(ii) and (B) the Closing Bid Price of the Common Stock on the last  possible
date which the Company could have issued such  Preferred  Stock  Certificate  to
such holder without violating Section 2(f)(ii).

                                      -14-



                                    (vii)  Book-Entry.  Notwithstanding anything
to the  contrary  set forth  herein,  upon  conversion  of  Preferred  Shares in
accordance  with the terms hereof,  the holder  thereof shall not be required to
physically  surrender the certificate  representing  the Preferred Shares to the
Company  unless  the  full  number  of  Preferred  Shares   represented  by  the
certificate  are being  converted.  The holder and the  Company  shall  maintain
records  showing the number of Preferred  Shares so  converted  and the dates of
such conversions or shall use such other method,  reasonably satisfactory to the
holder  and  the  Company,  so as  not  to  require  physical  surrender  of the
certificate representing the Preferred Shares upon each such conversion.  In the
event of any  dispute  or  discrepancy,  such  records of the  Company  shall be
controlling and determinative in the absence of manifest error.  Notwithstanding
the foregoing, if Preferred Shares represented by a certificate are converted as
aforesaid,  the  holder  may  not  transfer  the  certificate  representing  the
Preferred Shares unless the holder first  physically  surrenders the certificate
representing  the  Preferred  Shares to the Company,  whereupon the Company will
forthwith  issue and deliver upon the order of the holder a new  certificate  of
like tenor, registered as the holder may request,  representing in the aggregate
the remaining number of Preferred Shares  represented by such  certificate.  The
holder and any assignee,  by acceptance of a certificate,  acknowledge and agree
that, by reason of the provisions of this paragraph, following conversion of any
Preferred Shares, the number of Preferred Shares represented by such certificate
may be less than the number of Preferred Shares stated of the face thereof. Each
certificate for Preferred Shares shall bear the following legend:

                  ANY TRANSFEREE OF THIS CERTIFICATE SHOULD CAREFULLY REVIEW THE
                  TERMS   OF  THE   COMPANY'S   CERTIFICATE   OF   DESIGNATIONS,
                  PREFERENCES AND RIGHTS OF THE PREFERRED SHARES  REPRESENTED BY
                  THIS CERTIFICATE,  INCLUDING SECTION  2(f)(vii)  THEREOF.  THE
                  NUMBER OF PREFERRED SHARES REPRESENTED BY THIS CERTIFICATE MAY
                  BE LESS THAN THE NUMBER OF PREFERRED SHARES STATED ON THE FACE
                  HEREOF  PURSUANT TO SECTION  2(f)(vii) OF THE  CERTIFICATE  OF
                  DESIGNATIONS, PREFERENCES AND RIGHTS.

                           (g)      Mandatory   Conversion.   If  any  Preferred
Shares remain outstanding on the Maturity Date (as defined below), then all such
Preferred  Shares  shall be converted  as of such date in  accordance  with this
Section 2 as if the holders of such  Preferred  Shares had given the  Conversion
Notice on the Maturity Date; provided,  however,  that if a Triggering Event has
occurred and is continuing on the Maturity Date, then the Company shall,  within
five Business Days  following  the Maturity Date (unless  otherwise  notified in
writing by the holder of such  holder's  request  to have the  Preferred  Shares
converted  into  Common  Stock),  pay to each  holder of  Preferred  Shares then
outstanding,  in immediately  available funds, an amount equal to the Triggering
Event  Redemption  Price. All holders of Preferred Shares shall, on the Maturity
Date,   surrender  all   Preferred   Stock   Certificates,   duly  endorsed  for
cancellation,  to the Company,  provided  that the Company has complied with its
obligations under this Section 2(g) and 2(f).  Notwithstanding the foregoing, if

                                      -15-


the Common Stock is not designated for quotation on The Nasdaq  National  Market
or listed on The New York Stock Exchange, Inc. but such events do not constitute
a Triggering  Event,  then the Maturity Date shall be extended  until the Common
Stock is so designated or listed.  "Maturity  Date" means the date which is five
years after the applicable Issuance Date unless extended (i) as described in the
immediately   preceding   sentence,   (ii)  pursuant  to  Section  3(v)  of  the
Registration Rights Agreement, which extension shall equal two (2) days for each
day of any Grace Period (as defined in the  Registration  Rights  Agreement)  or
(iii)  pursuant to Section  4(n) of the  Securities  Purchase  Agreement,  which
extension  shall  equal  two (2) days for each day of any  Underwriting  Back-Up
Period (as defined in the Securities Purchase Agreement).

                           (h)      Fractional  Shares.  The  Company  shall not
issue any fraction of a share of Common Stock upon any conversion. All shares of
Common Stock (including fractions thereof) issuable upon conversion of more than
one Preferred  Share by a holder  thereof  shall be  aggregated  for purposes of
determining whether the conversion would result in the issuance of a fraction of
a share of Common Stock. If, after the aforementioned aggregation,  the issuance
would  result in the  issuance  of a fraction  of a share of Common  Stock,  the
Company  shall round such  fraction of a share of Common Stock up or down to the
nearest whole share.

                           (i)      Taxes.  The  Company  shall  pay any and all
taxes which may be imposed  upon it with respect to the issuance and delivery of
shares of Common Stock upon the conversion of the Preferred Shares.

                           (j)      Conversion  Restrictions.   The  right  of a
holder of Preferred Shares to convert  Preferred Shares pursuant to this Section
2 shall be limited as set forth below. Without the prior consent of the Company,
a holder of Preferred  Shares shall not be entitled to (i) convert any Preferred
Shares during the period  beginning on and  including the Initial  Issuance Date
and ending on and  including  the Fixed  Conversion  Price Trigger Date and (ii)
with respect to the Preferred  Shares issued on the Initial Issuance Date (a) if
the Initial  Fixed Price of such  Preferred  Shares is greater  than or equal to
$4.00   (subject  to   adjustment   for  any  stock   split,   stock   dividend,
recapitalization or other equitable  adjustment),  convert more than 25% of such
Preferred Shares issued to such holder, during any calendar month (starting with
the first  calendar  month which ends after the Fixed  Conversion  Price Trigger
Date), at a Conversion Price less than 90% of such Initial Fixed Price or (b) if
the Initial Fixed Price of such Preferred  Shares is less than $4.00 (subject to
adjustment  for any  stock  split,  stock  dividend,  recapitalization  or other
equitable adjustment),  convert more than 33% of such Preferred Shares issued to
such holder,  during any calendar month  (starting with the first calendar month
which ends after the Fixed Conversion Price Trigger Date), at a Conversion Price
less than 90% of such Initial Fixed Price or (iii) if the Initial Fixed Price is
equal to or greater than $4.00,  then the holders of the Preferred  Shares shall
not convert the Preferred Shares at a Conversion Price which is less than 50% of
the  Initial  Fixed  Price  unless the  Closing  Bid Price for any  twenty  (20)
consecutive day period is less than 50% of the Initial Fixed Price; provided the
number of  Preferred  Shares  permitted  to be  converted  each  calendar  month
pursuant to (i) and (ii) above shall be cumulative in that any shares  permitted
to be converted in any calendar month and not so converted shall be carried over
into  successive  calendar  months  until  so  converted.   Notwithstanding  the
foregoing,  the conversion restrictions set forth in this Section 2(j) shall not
apply (A) on and after any date on which the  Common  Stock is not listed on The
Nasdaq  National  Market  or The New  York  Stock  Exchange,  Inc.  or has  been

                                      -16-


suspended from trading (excluding suspensions of not more than one day resulting
from business announcements),  or any such delisting or suspension is threatened
or pending (including, without limitation, the Company is not in compliance with
published listing  requirements),  (B) on or after any date on which there shall
have occurred an event  constituting a Major  Transaction (as defined in Section
3(c)),  Triggering  Event (as  defined  in Section  3(d)) or a Material  Adverse
Change (as  defined  below),  (C) on or after any date on which there shall have
been an announcement of a pending Major Transaction, (D) on or after any date on
which  the  Company  issues  or sells or is  deemed  to have  issued or sold (I)
securities  which result in a reduction of any Initial  Fixed Price  pursuant to
Section 2(d)(i) or (II)  Convertible  Securities  that are  convertible  into or
exercisable or  exchangeable  for Common Stock at a Variable Price, or (E) on or
after the date the Company  delivers a Lock-Up Request Notice (as defined in the
Securities Purchase Agreement), a Notice of Conversion at Company's Election (as
defined  in Section  5) or a Notice of  Redemption  at  Company's  Election  (as
defined in Section 7). "Material Adverse Change" means any change, event, result
or happening not in the normal  course of the  Company's  business or operations
involving,  directly  or  indirectly,  the  Company  or any of its  subsidiaries
resulting in a material adverse effect on the business,  financial  condition or
results of operations of the Company and its subsidiaries, taken as a whole.

                           (k)       Adjustment   of   Conversion   Restrictions
upon  Issuance  of  Convertible  Securities.  Except as provided  below,  if the
Company  in  any  manner  issues  or  sells  Convertible   Securities  that  are
convertible into Common Stock (other than Excluded Securities or any Convertible
Securities  issued in an  offering  with  respect  to which the  holders  of the
Preferred Shares  purchased  Convertible  Securities  pursuant to their right to
participate in such offering pursuant to Section 4(g) of the Securities Purchase
Agreement) and are subject to (i)  restrictions on the amount of shares that can
be  converted,  or (ii) no  restrictions  on the  amount of  shares  that can be
converted (the  restriction on conversions or lack thereof being herein referred
to as the  "Conversion  Restriction"),  and such  Conversion  Restriction is not
formulated  using the same time periods and  percentages  used in Section  2(j),
then the  Company  shall  provide  written  notice  thereof  via  facsimile  and
overnight   courier  to  each  holder  of  the  Preferred  Shares   ("Conversion
Restriction Notice") on the date of issuance of such Convertible Securities.  If
the  holders  of  Preferred  Shares  representing  at  least  two-thirds  of the
Preferred  Shares then  outstanding  which remain subject to the restrictions in
Section 2(j) provide  written  notice via facsimile  and overnight  courier (the
"Conversion  Restriction  Election  Notice")  to the  Company  within  five  (5)
Business  Days of  receiving a Conversion  Restriction  Notice that such holders
desire to replace the conversion  restrictions set forth in Section 2(j) then in
effect with the Conversion  Restriction described in such Conversion Restriction
Notice,  then from and after the date of the Company's receipt of the Conversion
  Restriction Election Notice the conversion restrictions set forth in Section
2(j) automatically will be replaced with the Conversion  Restrictions  (together
with such  modifications  to this Certificate of Designations as may be required
to give full effect to the  substitution of the Conversion  Restrictions for the
conversion restrictions set forth in Section 2(j)).

                  (3)      Redemption at Option of Holders.

                           (a)      Redemption  Option  Upon Major  Transaction.
In addition to all other  rights of the holders of  Preferred  Shares  contained
herein,  simultaneous  with or after the occurrence of a Major  Transaction  (as

                                      -17-


defined  below),  each holder of Preferred  Shares shall have the right, at such
holder's  option,  to  require  the  Company  to redeem all or a portion of such
holder's Preferred Shares at a price per Preferred Share equal to the greater of
(i) 125% of the  Liquidation  Value (as  defined  in Section  11);  and (ii) the
product of (A) the  Conversion  Rate at such time, and (B) the Closing Bid Price
on the date of the public  announcement  of such Major  Transaction  or the next
date on which the exchange or market on which the Common Stock is traded is open
if such public  announcement is made (X) after 12:00 p.m.  Eastern Time, on such
date or (Y) on a date on which the  exchange or market on which the Common Stock
is traded is closed (the "Major Transaction Redemption Price").

                           (b)      Redemption  Option  Upon  Triggering  Event.
In addition to all other  rights of the holders of  Preferred  Shares  contained
herein,  simultaneous  with or after the  occurrence  of a Triggering  Event (as
defined  below),  each holder of Preferred  Shares shall have the right, at such
holder's  option,  to  require  the  Company  to redeem all or a portion of such
holder's Preferred Shares at a price per Preferred Share equal to the greater of
(i) 125% of the  Liquidation  Value;  and (ii) the product of (A) the Conversion
Rate at such  time,  and (B) the  greater  of (I) the  Closing  Bid Price on the
trading day immediately  preceding such Triggering Event or (II) the Closing Bid
Price  on the date of the  holder's  delivery  to the  Company  of a  Notice  of
Redemption at Option of Buyer Upon  Triggering  Event (as defined  below) or, if
such date of delivery is not a trading  day, the next date on which the exchange
or market on which the  Common  Stock is traded is open (the  "Triggering  Event
Redemption Price" and, collectively with the Major Transaction Redemption Price,
the "Redemption Price").

                           (c)      "Major Transaction". Subject to the Excluded
Redemption  Events  (as  defined  below)  pursuant  to  Section  3(h),  a "Major
Transaction"  shall  be  deemed  to have  occurred  at  such  time as any of the
following events:
                                    (i)     the consolidation, merger  or  other
business  combination of the Company with or into another Person (other than (A)
a  consolidation,  merger or other business  combination in which holders of the
Company's voting power immediately  prior to the transaction  continue after the
transaction to hold,  directly or indirectly,  the voting power of the surviving
entity or entities  necessary to elect a majority of the members of the board of
directors (or their  equivalent if other than a  corporation)  of such entity or
entities,  or (B) pursuant to a migratory merger effected solely for the purpose
of changing  the  jurisdiction  of  incorporation  of the Company) (a "Change of
Control Transaction");
                                    (ii)     the  sale or  transfer  of  all  or
substantially  all of the  Company's assets; or

                                    (iii)    a  purchase,   tender  or  exchange
offer  made to and  accepted  by the holders of more than the Trigger Percentage
of the outstanding shares of Common Stock.

                           (d)      "Triggering   Event".     Subject   to   the
Excluded  Redemption Events pursuant to Section 3(h), a "Triggering Event" shall
be deemed to have occurred at such time as any of the following events:

                                      -18-


                                    (i)     the  failure  of  the   Registration
Statement  (as  defined in the  Registration  Rights  Agreement)  to be declared
effective  by the SEC on or prior to the date that is 150 days after the Initial
Issuance Date;

                                    (ii)    while  the   Registration  Statement
is required to be maintained effective pursuant to the terms of the Registration
Rights  Agreement,  except for any  Allowable  Grace  Period (as  defined in the
Registration Rights Agreement),  the effectiveness of the Registration Statement
lapses for any reason  (including,  without  limitation,  the issuance of a stop
order) or is unavailable  to the holder of the Preferred  Shares for sale of the
Registrable  Securities  (as defined in the  Registration  Rights  Agreement) in
accordance with the terms of the Registration  Rights Agreement,  and such lapse
or unavailability continues for a period of ten consecutive trading days;

                                    (iii)   suspension from listing or delisting
of the  Common  Stock  from The  Nasdaq  National  Market or The New York  Stock
Exchange, Inc. for a period of five consecutive days;

                                    (iv)    the  Company's  notice to any holder
of Preferred Shares,  including by way of public  announcement,  at any time, of
its intention not to comply with proper requests for conversion of any Preferred
Shares  into  shares of Common  Stock,  including  due to any of the reasons set
forth in Section 4(a) below;

                                    (v)     the  Company  shall  have  failed to
make any Excluded  Redemption Event Daily Payment (as defined below) in a timely
manner in accordance  with Section 3(i) or the Company shall have failed to give
an Excluded  Redemption Option Election Notice (as defined below) within one (1)
day of receipt of the  Holders'  Excluded  Redemption  Event  Notice (as defined
below); or

                                    (vi)    the     Company     breaches     any
representation,  warranty, covenant or other term or condition of the Securities
Purchase  Agreement,  the  Registration  Rights  Agreement,  this Certificate of
Designations or any other agreement,  document,  certificate or other instrument
delivered in connection with the  transactions  contemplated  thereby or hereby,
except to the extent that such breach would not have a Material  Adverse  Effect
(as defined in Section 3(a) of the Securities Purchase Agreement) and except, in
the  case of a  breach  of a  covenant  which is  curable,  only if such  breach
continues for a period of at least ten days.

                           (e)      Mechanics  of  Redemption at Option of Buyer
Upon Major  Transaction.  No sooner than 15 days nor later than 10 days prior to
the  consummation  of  a  Major  Transaction,   but  not  prior  to  the  public
announcement of such Major Transaction, the Company shall deliver written notice
thereof via facsimile and overnight courier (a "Notice of Major Transaction") to
each holder of Preferred  Shares.  At any time during the period beginning after
receipt  of a Notice of Major  Transaction  (or,  in the event a Notice of Major
Transaction is not delivered at least 10 days prior to a Major  Transaction,  at
any time on or after the date which is 10 days prior to a Major Transaction) and
ending on the date of such Major Transaction, any holder of the Preferred Shares
then  outstanding  may  require  the  Company  to redeem all or a portion of the

                                      -19-


holder's  Preferred Shares then outstanding by delivering written notice thereof
via facsimile and overnight  courier (a "Notice of Redemption at Option of Buyer
Upon Major Transaction") to the Company, which Notice of Redemption at Option of
Buyer Upon Major  Transaction  shall indicate (i) the number of Preferred Shares
that such holder is submitting for  redemption,  and (ii) the  applicable  Major
Transaction Redemption Price, as calculated pursuant to Section 3(a).

                           (f)      Mechanics  of  Redemption at Option of Buyer
Upon Triggering  Event.  Within one (1) day after the occurrence of a Triggering
Event,  the Company  shall  deliver  written  notice  thereof via  facsimile and
overnight  courier (a "Notice of Triggering  Event") to each holder of Preferred
Shares.  At any time during the period beginning after the earlier of a holder's
receipt of a Notice of  Triggering  Event and such  holder  becoming  aware of a
Triggering  Event and  ending  on the date  which is  thirty  (30) days  after a
holder's receipt of a Notice of Triggering Event, any holder of Preferred Shares
then  outstanding  may  require  the  Company  to redeem all or a portion of the
holder's  Preferred Shares then outstanding by delivering written notice thereof
via facsimile and overnight  courier (a "Notice of Redemption at Option of Buyer
Upon Triggering Event") to the Company,  which Notice of Redemption at Option of
Buyer Upon  Triggering  Event shall indicate (i) the number of Preferred  Shares
that  such  holder  is  submitting  for  redemption,  and  (ii)  the  applicable
Triggering Event Redemption Price, as calculated pursuant to Section 3(b).

                           (g)      Payment   of   Redemption   Price.  Upon the
Company's  receipt  of a  Notice(s)  of  Redemption  at  Option  of  Buyer  Upon
Triggering  Event or a  Notice(s)  of  Redemption  at Option of Buyer Upon Major
Transaction from any holder of Preferred Shares, the Company shall promptly, but
in no event later than one (1) day following such receipt, notify each holder of
Preferred  Shares by facsimile  of the  Company's  receipt of such  Notice(s) of
Redemption at Option of Buyer Upon  Triggering  Event or Notice(s) of Redemption
at Option of Buyer Upon Major  Transaction and each holder which has sent such a
notice shall promptly submit, if required by Section(2)(f)(vii),  to the Company
or its Transfer  Agent such holder's  Preferred  Stock  Certificates  which such
holder has elected to have  redeemed.  The Company shall deliver the  applicable
Triggering  Event  Redemption  Price,  in the case of a  redemption  pursuant to
Section  3(f),  to such holder within five (5) Business Days after the Company's
receipt of a Notice of Redemption at Option of Buyer Upon Triggering  Event and,
in the case of a redemption  pursuant to Section 3(e), the Company shall deliver
the  applicable  Major  Transaction   Redemption  Price  simultaneous  with  the
consummation  of the Major  Transaction;  provided  that, if required by Section
2(f)(vii),  a holder's Preferred Stock Certificates shall have been so delivered
to the Company;  provided further that if the Company is unable to redeem all of
the  Preferred  Shares to be redeemed,  the Company  shall redeem an amount from
each holder of Preferred  Shares being redeemed equal to such holder's  pro-rata
amount (based on the number of Preferred  Shares held by such holder relative to
the number of  Preferred  Shares  outstanding)  of all  Preferred  Shares  being
redeemed.  If the  Company  shall  fail to redeem  all of the  Preferred  Shares
submitted for redemption  (other than pursuant to a dispute as to the arithmetic
calculation of the Redemption  Price),  in addition to any remedy such holder of
Preferred Shares may have under this Certificate of Designation,  the Securities
Purchase  Agreement  and  the  Registration  Rights  Agreement,  the  applicable
Redemption  Price payable in respect of such unredeemed  Preferred  Shares shall
bear interest at the rate of 1.5% per month  (prorated for partial months) until

                                      -20-


paid in full. Until the Company pays such unpaid applicable  Redemption Price in
full to a holder of Preferred Shares submitted for redemption, such holder shall
have  the  option  (the  "Void  Optional  Redemption  Option")  to,  in  lieu of
redemption,  require the Company to promptly return to such holder(s) all of the
Preferred Shares that were submitted for redemption by such holder(s) under this
Section 3 and for which the  applicable  Redemption  Price has not been paid, by
sending  written notice thereof to the Company via facsimile (the "Void Optional
Redemption Notice"). Upon the Company's receipt of such Void Optional Redemption
Notice(s)  prior to  payment  of the full  applicable  Redemption  Price to such
holder, (i) the Notice(s) of Redemption at Option of Buyer Upon Triggering Event
or the Notice(s) of Redemption at Option of Buyer Upon Major Transaction, as the
case may be,  shall be null and void  with  respect  to those  Preferred  Shares
submitted for redemption and for which the applicable  Redemption  Price has not
been paid, (ii) the Company shall  promptly,  but in no event later than one (1)
day following such receipt, return any Preferred Shares submitted to the Company
by each  holder  for  redemption  under  this  Section  3(g) and for  which  the
applicable  Redemption Price has not been paid and (iii) the Initial Fixed Price
of such  returned  Preferred  Shares  shall be adjusted to the lesser of (A) the
Initial  Fixed  Price  as in  effect  on the date on  which  the  Void  Optional
Redemption  Notice(s) is delivered to the Company and (B) the lowest Closing Bid
Price  during  the  period  beginning  on the date on  which  the  Notice(s)  of
Redemption  of  Option of Buyer  Upon  Major  Transaction  or the  Notice(s)  of
Redemption  at Option of Buyer  Upon  Triggering  event,  as the case may be, is
delivered  to the  Company  and  ending on the date on which  the Void  Optional
Redemption  Notice(s) is delivered to the Company;  provided  that no adjustment
shall be made if such  adjustment  would  result in an  increase  of the Initial
Fixed Price then in effect.  Notwithstanding  the  foregoing,  in the event of a
dispute  as to the  determination  of the  Closing  Bid Price or the  arithmetic
calculation of the Redemption  Price, such dispute shall be resolved pursuant to
Section  2(f)(iii) above with the term "Redemption  Price" being substituted for
the term "Conversion  Rate". A holder's  delivery of a Void Optional  Redemption
Notice and  exercise of its rights  following  such notice  shall not effect the
Company's  obligations to make any payments which have accrued prior to the date
of such notice.  Payments  provided for in this Section 3 shall have priority to
payments to other stockholders in connection with a Major Transaction.

                           (h)     Events Excluded from  Redemption  Provisions.
Notwithstanding anything to the contrary set forth in Section 3, Section 4(a)(I)
or Section 4(a)(II), the following events shall be excluded from the definitions
of Major Transaction and Triggering Event (individually, an "Excluded Redemption
Event" and, collectively, the "Excluded Redemption Events"):

                                    (i)     the   failure  of   the Registration
Statement  to be declared  effective  by the SEC on or prior to the date that is
150 days after the Initial Issuance Date, provided that the Company has used its
best efforts to have such Registration Statement declared effective by the SEC;

                                    (ii)    while  the  Registration   Statement
is required to be maintained effective pursuant to the terms of the Registration
Rights  Agreement,  except for any Allowable Grace Period,  the effectiveness of
the Registration Statement lapses for any reason (including, without limitation,

                                      -21-


the issuance of a stop order) or is  unavailable  to the holder of the Preferred
Shares for sale of the  Registrable  Securities in accordance  with the terms of
the Registration  Rights Agreement,  and such lapse or unavailability  continues
for a period of ten consecutive trading days, provided that the Company has used
its best efforts to maintain the  effectiveness of such  Registration  Statement
and has not taken  voluntary  action or  voluntarily  failed to take any  action
which has directly or indirectly  caused the Registration  Statement to lapse or
become  unavailable for the sale of all the Registrable  Securities  pursuant to
the terms of the Registration Rights Agreement;

                                    (iii)   suspension from listing or delisting
of the  Common  Stock  from The  Nasdaq  National  Market or The New York  Stock
Exchange,  Inc. for a period of five or more consecutive days, provided that the
Company  (A) has used its best  efforts to  maintain  the  listing of the Common
Stock on such exchange and has not taken any voluntary action or has voluntarily
failed to take any action  which has  resulted  in the  delisting  of the Common
Stock or the suspension of the Common Stock from trading or (B) has  voluntarily
delisted or suspended trading of the Common Stock because either (I) the holders
of the Preferred  Shares have exercised  their rights under Section 4(e) to have
the Common Stock  delisted or (II) the Company is not  permitted to issue shares
of  Common  Stock  to a holder  of  Preferred  Shares  upon  conversion  of such
Preferred  Shares due to the  Exchange  Cap and the  Company  delists the Common
Stock so that the Exchange Cap limitations no longer apply; and

                                    (iv)    a purchase, tender or exchange offer
made to and accepted by the holders of more than the Trigger  Percentage  of the
outstanding  shares of Common Stock which is not approved or  recommended by the
Company's Board of Directors or a proxy or consent  solicitation  (other than by
or on behalf of the Company)  which  results in a Change of Control  Transaction
where such proxy or consent  solicitation  is not approved or recommended by the
Company's Board of Directors.

As soon as  practicable  but in no  event  later  than  one  (1) day  after  the
occurrence of an Excluded  Redemption  Event,  the Company shall deliver written
notice  thereof via  facsimile  and  overnight  courier (a  "Company's  Excluded
Redemption Event Notice") to each holder of Preferred Shares. At any time during
the period  beginning  after the earlier of the holders'  receipt of a Company's
Excluded  Redemption Event Notice and such holders becoming aware of an Excluded
Redemption  Event and  ending on the date  which is thirty  (30) days  after the
holders' receipt of a Company's Excluded Redemption Event Notice, the holders of
at least  two-thirds of the Preferred  Shares then  outstanding  may require the
Company to satisfy its  obligations  under  Section 3(i) by  delivering  written
notice  thereof  via  facsimile  and  overnight  courier (a  "Holders'  Excluded
Redemption  Event Notice") to the Company.  The Company shall within one (1) day
of its receipt of the Holders'  Excluded  Redemption  Event Notice  provide each
holder with written  notice via  facsimile  and  overnight  courier (a "Excluded
Redemption  Option Election Notice") which notice shall specify the option which
the Company has elected to exercise  pursuant to and in accordance  with Section
3(i).

                           (i)       Rights  of  the  Holders  of the  Preferred
Shares upon the Occurrence of an Excluded  Redemption  Event. In addition to any

                                      -22-


other remedies the holders of the Preferred Shares may have at law or in equity,
if an Excluded  Redemption  Event occurs and the holders of the Preferred Shares
have provided the Company with a Holders' Excluded Redemption Event Notice, then
the  Company,  at its option,  shall  either (A) pay to each holder of Preferred
Shares  the  Trigger  Event  Redemption  Price  for  each  outstanding  share of
Preferred  Stock held by such holder  pursuant to and in accordance with Section
3(g) or (B) if:

                                    (i)     the  Excluded  Redemption  Event  is
pursuant to Section  3(h)(i),  then (I) beginning on and including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption Event Daily Payment (as defined below) on each day that such Excluded
Redemption Event  continues,  provided,  however,  that the Company shall not be
obligated to make an Excluded  Redemption  Event Daily  Payment for more than 15
days in any 365 day period and (II)  immediately  upon the occurrence of such an
Excluded  Redemption  Event (and from time to time as  applicable),  the Initial
Fixed Price of the Preferred Shares shall be adjusted to equal the lesser of (y)
the Initial Fixed Price in effect for such Preferred Shares on the date which is
150 days after the Initial  Issuance  Date or (z) the product of  ((alpha))  the
Payment  Limitation  Reduction  Percentage  (as  defined  below)  multiplied  by
((beta)) .80 multiplied by ((gamma)) the lowest Variable Conversion Price during
the  period  beginning  on and  including  the date  which is 150 days after the
Initial  Issuance  Date and ending on and  including  the date the  Registration
Statement is declared effective by the SEC;

                                    (ii)    the  Excluded  Redemption  Event  is
pursuant to Section 3(h)(ii),  then (I) beginning on and including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 15 days in any 365 day
period and (II) immediately  upon the occurrence of such an Excluded  Redemption
Event (and from time to time as  applicable),  the  Initial  Fixed  Price of the
Preferred  Shares shall be adjusted to equal the lesser of (y) the Initial Fixed
Price in effect for such Preferred Shares on the date of the initial  occurrence
of the Excluded  Redemption Event (the "Occurrence  Date") or (z) the product of
((alpha)) the Payment Limitation Reduction Percentage multiplied by ((beta)) .80
multiplied by ((gamma)) the lowest Variable  Conversion  Price during the period
beginning on and including the  Occurrence  Date and ending on and including the
date that the Company cures such Excluded Redemption Event;

                                    (iii)   the  Excluded  Redemption  Event  is
pursuant to Section  3(h)(iii),  then  beginning on and  including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 15 days in any 365 day
period, and further provided, the Company may elect, in lieu of the forgoing, by
providing  each holder of Preferred  Shares with written  notice of its election
pursuant to this  Section  3(i)(iii)  via  facsimile on the  Occurrence  Date to
adjust the Initial Fixed Price of the Preferred  Shares,  effective  immediately
upon the occurrence of such Excluded  Redemption Event (and from time to time as
applicable), to equal the product of (y) .80 multiplied by (z) 85% of the lesser

                                      -23-


of (A) the  Initial  Fixed  Price of the  Preferred  Shares  as in effect on the
Occurrence Date and (B) the lowest Variable  Conversion  Price during the period
beginning on and  including the  Occurrence  Date and ending on the 45th trading
day following the Occurrence Date (provided that such 45 trading day period will
be extended  by one trading day for each day on which there is no closing  sales
price or closing  trade  price  reported  by  Bloomberg  or no bid prices of any
market  makers  reported by the  National  Quotation  Bureau,  Inc. in the "pink
sheets" for the Company's securities);

                                    (iv)    the  Excluded  Redemption  Event  is
pursuant to Section 3(h)(iv), then (I) then beginning on and including the first
day following the receipt by the Company of a Holders' Excluded Redemption Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 10 days in any 365 day
period and (II) immediately  upon the occurrence of such an Excluded  Redemption
Event (and from time to time as  applicable),  the  Initial  Fixed  Price of the
Preferred  Shares shall be adjusted to equal the lesser of (y) the Initial Fixed
Price in effect  for such  Preferred  Shares on the  Occurrence  Date or (z) the
product of ((alpha)) the Payment Limitation Reduction  Percentage  multiplied by
((beta)) .80 multiplied by ((gamma)) the lowest Variable Conversion Price during
the period beginning on and including the date on which the purchase,  tender or
exchange  offer or a proxy  or  consent  solicitation  (referred  to in  Section
3(h)(vi))  was first  publically  announced and ending on and including the date
such  purchase,  tender or exchange offer or proxy or consent  solicitation  was
publicly announced as being consummated, abandoned or terminated.

"Excluded  Redemption Event Daily Payment" shall mean the payment to each holder
of Preferred  Shares,  by the Company,  of an amount in cash per Preferred Share
equal  to  one  percent  (1%)  of the  Liquidation  Value.  "Payment  Limitation
Reduction  Percentage"  shall  mean  (I)  85%,  with  respect  to  any  Excluded
Redemption Event other than the first Excluded  Redemption Event to occur during
any 365 day  period,  provided  that the  Company  shall  have made an  Excluded
Redemption  Event  Daily  Payment  on at least 15 days in such 365 day period or
(II) 100%, otherwise.

                                      -24-



                  (4)      Inability to Fully Convert.

                           (a)       Holder's  Option if  Company  Cannot  Fully
Convert.  If,  upon the  Company's  receipt  of a  Conversion  Notice  or on the
Maturity Date,  the Company can not issue shares of Common Stock  registered for
resale  under the  Registration  Statement  for any reason,  including,  without
limitation,  because the Company (I) does not have a sufficient number of shares
of Common  Stock  authorized  and  available,  (II) is otherwise  prohibited  by
applicable law or by the rules or regulations of any stock exchange, interdealer
quotation system or other  self-regulatory  organization  with jurisdiction over
the Company or its Securities, including without limitation the Exchange Cap (as
defined in Section 14 below),  from  issuing all of the Common Stock which is to
be issued to a holder of Preferred  Shares  pursuant to a  Conversion  Notice or
(III) fails to have a sufficient number of shares of Common Stock registered for
resale under the  Registration  Statement,  then the Company shall issue as many
shares of Common Stock as it is able to issue in  accordance  with such holder's
Conversion  Notice  and  pursuant  to  Section  2(f) and,  with  respect  to the
unconverted  Preferred Shares,  the holder,  solely at such holder's option, can
elect to:

                                    (i)     require  the  Company to redeem from
such  holder  those  Preferred  Shares for which the  Company is unable to issue
Common Stock in accordance  with such  holder's  Conversion  Notice  ("Mandatory
Redemption") at a price per Preferred Share (the "Mandatory  Redemption  Price")
equal to the product of (A) the Conversion Rate and (B) the Closing Bid Price as
of such Conversion Date;

                                    (ii)     if the Company's inability to fully
convert Preferred Shares is pursuant to Section  4(a)(III),  require the Company
to issue  restricted  shares of Common Stock in  accordance  with such  holder's
Conversion Notice and pursuant to Section 2(f);


                                    (iii)  void its Conversion Notice and retain
or have returned,  as the case may be, the  nonconverted  Preferred  Shares that
were to be converted pursuant to such holder's  Conversion Notice (provided that
a  holder's  voiding  its  Conversion  Notice  shall not  effect  the  Company's
obligations  to make any payments  which have accrued  prior to the date of such
notice); or

                                    (iv)  if  the  Company's  inability to fully
convert  Preferred  Shares is pursuant to the Exchange Cap  described in Section
4(a)(II), require the Company to issue shares of Common Stock in accordance with
such  holder's  Conversion  Notice and  pursuant to Section 2(f) at a Conversion
Price  equal to the  average of Closing  Bid Prices of the Common  Stock for the
five  consecutive  trading days  preceding  such holder's  Notice in Response to
Inability  to  Convert  (as  defined  below) or such  other  market  price  that
satisfies the applicable exchange or trading market.

                           (b)      Mechanics of Fulfilling  Holder's  Election.
Upon receipt of a facsimile  copy of a Conversion  Notice from such holder which
cannot be fully  satisfied  as  described  in Section  4(a),  the Company  shall
promptly but in no event later than one (1) day following  such receipt send via

                                      -25-


facsimile to a holder of Preferred  Shares, a notice of the Company's  inability
to fully  satisfy  such  holder's  Conversion  Notice (the  "Inability  to Fully
Convert Notice").  Such Inability to Fully Convert Notice shall indicate (i) the
reason  why the  Company is unable to fully  satisfy  such  holder's  Conversion
Notice,  (ii) the number of Preferred Shares which cannot be converted and (iii)
the applicable  Mandatory Redemption Price. Such holder shall notify the Company
of its election pursuant to Section 4(a) above by delivering  written notice via
facsimile  to the Company  ("Notice in Response to Inability to Convert") by the
later of (A) the date  which  is 30 days  after  such  holder's  receipt  of the
Inability  to  Fully  Convert  Notice  and (B) the  second  (2nd)  Business  Day
following the date on which the Company  provides such holder  written notice it
has cured its inability to fully convert.

                           (c)      Payment of Redemption Price.  If such holder
shall elect to have its shares redeemed pursuant to Section 4(a)(i), the Company
shall pay the Mandatory  Redemption Price in cash to such holder within ten days
of the  Company's  receipt of the  holder's  Notice in Response to  Inability to
Convert.  If the Company shall fail to pay the applicable  Mandatory  Redemption
Price to such holder on a timely  basis as described in this Section 4(c) (other
than pursuant to a dispute as to the determination of the arithmetic calculation
of the  Redemption  Price),  in addition to any remedy such holder of  Preferred
Shares may have under this Certificate of Designations,  the Securities Purchase
Agreement and the Registration  Rights Agreement,  such unpaid amount shall bear
interest at the rate of 1.5% per month  (prorated for partial months) until paid
in full.  Until  the  full  Mandatory  Redemption  Price is paid in full to such
holder,  such holder may void the  Mandatory  Redemption  with  respect to those
Preferred Shares for which the full Mandatory Redemption Price has not been paid
and (i) receive back such  Preferred  Shares and (ii) the Initial Fixed Price of
such  returned  Preferred  Shares  shall be  adjusted  to the  lesser of (A) the
Initial  Fixed  Price in  effect  on the date on which  the  holder  voided  the
Mandatory  Redemption  and (B) the lowest  Closing  Bid Price  during the Period
beginning on the  Conversion  Date and ending on the date the holder  voided the
Mandatory Redemption. Notwithstanding the foregoing, if the Company fails to pay
the applicable  Mandatory  Redemption  Price within such ten-day period due to a
dispute as to the determination of the arithmetic  calculation of the Redemption
Price,  such dispute shall be resolved  pursuant to Section  2(f)(iii)  with the
term "Redemption Price" being substituted for the term "Conversion Rate".

                           (d)      Pro-rata Conversion and  Redemption.  In the
event the Company receives a Conversion  Notice,  Notice of Redemption at Option
of Buyer Upon Major  Transaction or Notice of Redemption at Option of Buyer Upon
Triggering  Event from more than one holder of Preferred  Shares on the same day
and the Company can convert  and/or  redeem some,  but not all, of the Preferred
Shares  pursuant to this  Section 4, the Company  shall  convert and redeem from
each holder of Preferred  Shares electing to have Preferred Shares converted and
redeemed at such time an amount equal to such holder's pro-rata amount (based on
the number of  Preferred  Shares held by such  holder  relative to the number of
Preferred  Shares  outstanding)  of all  Preferred  Shares being  converted  and
redeemed at such time.

                           (e)      Forced Delisting. If the Company's inability
to fully  convert  Preferred  Shares is  pursuant  to the  Exchange  Cap and the
stockholders  have not voted to approve issuances in excess of the Exchange Cap,
and if so directed by the holders of at least two-thirds of the Preferred Shares
then outstanding,  the Company shall promptly,  but in no event later than three
(3) Business Days after receiving such directions,  delist the Common Stock from

                                      -26-


the exchange or automated  quotation  system on which the Common Stock is traded
and have the Common Stock,  at such holders'  option,  traded on the  electronic
bulletin board or the "pink sheets."


                 (5) Conversion at the Company's Election.  During the three (3)
Business Days (a "Conversion Election Period") which immediately follow at least
twenty (20)  consecutive  trading days during which the Closing Bid Price of the
Common  Stock on each  trading day during such twenty (20)  consecutive  trading
days is not less than 200% of the  Trigger  Price,  the  Company  shall have the
right, in its sole  discretion,  to require that any or all of such  outstanding
Preferred  Shares be  converted  ("Conversion  at  Company's  Election")  at the
Conversion  Rate;  provided  that the  Conditions to Conversion at the Company's
Election  (as set forth below) are  satisfied.  The Company  shall  exercise its
right to Conversion at Company's  Election by providing each holder of Preferred
Shares written notice  ("Notice of Conversion at Company's  Election")  during a
Conversion  Election  Period  and at least  15  trading  days  prior to the date
selected by the Company for conversion  ("Company's  Election Conversion Date").
If the  Company  elects to  require  conversion  of some,  but not all,  of such
Preferred  Shares,  the  Company  shall  convert an amount  from each  holder of
Preferred  Shares equal to such holder's pro rata amount (based on the number of
such  Preferred  Shares  held by such  holder  relative  to the  number  of such
Preferred Shares  outstanding on date of the Company's delivery of the Notice of
Conversion  at  Company's  Election)  of all  Preferred  Shares  the  Company is
requiring to be converted.  The Notice of Conversion at Company's Election shall
indicate  (x) the  number of  Preferred  Shares the  Company  has  selected  for
conversion,  (y) the Company's Election Conversion Date, which date shall be not
less than 15 or more than 30 trading  days after each  holder's  receipt of such
notice, and (z) each holder's pro rata share of outstanding Preferred Shares the
Company  is  requiring  to be  converted.  All  Preferred  Shares  selected  for
conversion in accordance with the provision of this Section 5 shall be converted
as of the Company's Election  Conversion Date in accordance with Section 2 as if
the holders of such Preferred Shares selected by the Company to be converted had
given the  Conversion  Notice on the  Company's  Election  Conversion  Date.  If
required by Section  2(f)(vii),  all holders of Preferred Shares shall thereupon
and within  two  Business  Days after the  Company's  Election  Conversion  Date
surrender  all  Preferred  Stock  Certificates  selected  for  conversion,  duly
endorsed for  cancellation,  to the Company.  "Conditions  to  Conversion at the
Company's Election" means the following  conditions:  (i) on each day during the
period beginning 30 days prior to the date of the Company's Notice of Conversion
at  Company's  Election  and  ending on and  including  the  Company's  Election
Conversion Date, the Registration Statement shall be effective and available for
the sale of no less than 125% of the sum of (A) the number of Conversion  Shares
then issuable upon the conversion of all outstanding  Preferred  Shares (without
regard to any  limitations  on conversion  herein or  elsewhere),  including the
Conversion  Shares to be issued  pursuant to this  Conversion  at the  Company's
Election,  and (B) the  number of  Conversion  Shares  that are then held by the
holders of the Preferred Shares; (ii) on each day during the period beginning 30
days  prior to the date of the  Company's  Notice  of  Conversion  at  Company's
Election and ending on and including the Company's Election Conversion Date, the
Common Stock is designated for quotation on The Nasdaq National Market or listed
on  The  New  York  Stock  Exchange,  Inc.  and is not  suspended  from  trading
(excluding  suspensions  of not  more  than  one  day  resulting  from  business
announcements);  (iii)  on each  day  during  the 20  consecutive  trading  days
immediately preceding the date of the receipt by the holders of Preferred Shares
of the Notice of Conversion at Company's Election,  the Closing Bid Price of the

                                      -27-


Common Stock is at least 200% of the Trigger Price;  (iv) on each day during the
period  beginning  on and  including  the date of the  receipt by the holders of
Preferred Shares of the Notice of Conversion at Company's Election and ending on
and including the Company's  Election  Conversion Date, the Closing Bid Price of
the Common  Stock is at least 200% of the Trigger  Price;  (v) during the period
beginning on the Initial Issuance Date and ending on and including the Company's
Election Conversion Date, the Company shall have delivered all Conversion Shares
upon conversion of the Preferred  Shares to the holders of Preferred Shares on a
timely  basis  as  set  forth  in  Section   2(f)(ii)  of  this  Certificate  of
Designations;  provided,  however, that for purposes of this Section 5 only, the
Company shall be deemed to have satisfied the condition set forth in this clause
(v)  if on  not  more  than  two  occasions  the  Company  failed  to  meet  the
requirements  of Section  2(g)(ii)  by no more than three days;  (vi)  neither a
Triggering  Event nor any event that with the passage of time would constitute a
Triggering  Event  (assuming  it was not cured) shall have  occurred;  (vii) the
Company shall not give a Notice of Conversion at Company's Election prior to the
date which is the Fixed  Conversion  Price Trigger Date;  and (viii) the Company
otherwise has satisfied its  obligations in all material  respects and is not in
default in any material  respect under this  Certificate  of  Designations,  the
Securities   Purchase   Agreement  and  the   Registration   Rights   Agreement.
Notwithstanding  the above,  any holder of  Preferred  Shares may  convert  such
shares  (including  Preferred  Shares selected for conversion) into Common Stock
pursuant  to  Section  2(a) on or prior to the date  immediately  preceding  the
Company's Election Conversion Date.


                 (6) Company's Right to Redeem in Lieu of Conversion. Subject to
the terms and conditions of this Section 6 below,  at any time after the Initial
Issuance  Date,  and so long as the Company has provided  appropriate  notice as
described  below, the Company may elect to redeem Preferred Shares submitted for
conversion  in lieu of  converting  such  Preferred  Shares,  provided  that the
Conversion Price for such Preferred Shares on the Conversion Date is less than a
price (the "Redemption in Lieu of Conversion Trigger Price") equal to 90% of the
Initial Fixed Price,  which  relates to such  Preferred  Shares,  (appropriately
adjusted for any stock  split,  stock  dividend,  combination  or other  similar
transaction)  (a "Company  Redemption  in Lieu of  Conversion").  If the Company
elects to redeem  some,  but not all,  of the  Preferred  Shares  submitted  for
conversion,  the Company  shall  redeem a number of  Preferred  Shares from each
holder of Preferred Shares submitted for conversion on the applicable date equal
to such holder's  pro-rata amount (based on the number of Preferred  Shares held
by such holder  relative to the number of Preferred  Shares  outstanding) of all
Preferred Shares submitted for conversion which the Company elects to redeem.

                           (a)      Redemption  Price of  Company  Redemption in
Lieu of  Conversion.  The  "Redemption  Price of Company  Redemption  in Lieu of
Conversion"  shall  be an  amount  per  Preferred  Share  equal  to  105% of the
Liquidation Value of such Preferred Shares.

                           (b)      Mechanics of Company  Redemption  in Lieu of
Conversion. The Company shall exercise its right to redeem by delivering written
notice by facsimile and overnight courier ("Notice of Company Redemption in Lieu
of Conversion") to (i) each holder of the Preferred Shares and (ii) the Transfer
Agent.  Such Notice of Company  Redemption in Lieu of Conversion  shall indicate
(A) the maximum,  if any, aggregate number of Preferred Shares which the Company

                                      -28-


will redeem for Company  Redemption  in Lieu of  Conversion  and (B) confirm the
time period  during which the Company may effect  Company  Redemption in Lieu of
Conversion,  which  period  shall  begin on and  include  the date which is five
Business  Days after the date of receipt by all of the holders' of the Notice of
Redemption  in Lieu of  Conversion  and  shall  end on the date set forth in the
Notice of Company  Redemption in Lieu of Conversion (the  "Redemption in Lieu of
Conversion  Period").  If the  Company  elects to limit the number of  Preferred
Shares which it will redeem during the Redemption in Lieu of Conversion  Period,
the Company shall allocate for redemption from each holder of Preferred Shares a
number of Preferred Shares equal to such holder's  pro-rata amount (based on the
number of  Preferred  Shares  held by such  holder on the date of the  Notice of
Company  Redemption  in Lieu of  Conversion  relative  to the  total  number  of
Preferred  Shares  outstanding  on such  date).  The  Company  may  terminate  a
Redemption  in Lieu of  Conversion  Period at any time with respect to Preferred
Shares which have not been submitted for conversion by delivering written notice
of such  termination  to each  holder  of  Preferred  Shares  by  facsimile  and
overnight  courier at least five Business  Days prior to the  effective  date of
such  termination.  Notwithstanding  anything to the contrary in this Section 6,
the  Company  shall  convert  Preferred  Shares  pursuant  to  Section 2 if such
Preferred Shares are submitted for conversion (i) before the beginning, or after
the effective date of the  termination,  of the Redemption in Lieu of Conversion
Period,  (ii) for a Conversion  Price greater than or equal to the Redemption in
Lieu of  Conversion  Trigger  Price or (iii) are in excess of such  holder's pro
rata allocation of the maximum number of Preferred Shares the Company  indicated
that it would redeem in its Notice of Company Redemption in Lieu of Conversion.


                           (c)      Payment  of Redemption  Price.  The  Company
shall pay the  applicable  Redemption  Price of  Company  Redemption  in Lieu of
Conversion to the holder of the Preferred  Shares being redeemed in cash by wire
transfer within five Business Days after the applicable Conversion Date on which
such Preferred Shares are submitted for conversion. If the Company shall fail to
pay the applicable  Redemption Price of Company Redemption in Lieu of Conversion
to such holder on a timely basis as described in this Section  6(c), in addition
to any remedy such holder of Preferred Shares may have under this Certificate of
Designations  and the Securities  Purchase  Agreement,  such unpaid amount shall
bear  interest  at the rate of 1.5% per  month  until  paid in full.  Until  the
Company pays such unpaid  applicable  Redemption Price of Company  Redemption in
Lieu  of  Conversion  full to each  holder,  each  holder  of  Preferred  Shares
submitted for redemption pursuant to this Section 6 and for which the applicable
Redemption Price of Company  Redemption in Lieu of Conversion has not been paid,
shall have the option to, in lieu of  redemption,  (A) to require the Company to
promptly  return to each holder all of the Preferred  Shares that were submitted
for  redemption by such holder under this Section 6 and for which the applicable
Redemption  Price of Company  Redemption in Lieu of Conversion has not been paid
or (B) to convert those  Preferred  Shares for which the  applicable  Redemption
Price of the Company  Redemption  in Lieu of  Conversion  has not been paid at a
Conversion  Price equal to the lesser of (I) the Conversion  Price applicable to
such  conversion  on the date on which such  Preferred  Shares  were  originally
presented for conversion and (II) the Conversion  Price which would have been in
effect if such  Preferred  Shares were  presented for conversion on the Business
Day immediately  following the last day on which the Company could have effected
a timely  Company  Redemption in Lieu of Conversion,  by sending  written notice
thereof to the Company via  facsimile  (the "Void Company  Redemption  Notice").
Upon the Company's receipt of such Void Company Redemption Notice(s), requesting

                                      -29-


the return of the  Preferred  Shares,  prior to  payment of the full  applicable
redemption  price  to each  holder,  (i)  the  Company's  Redemption  in Lieu of
Conversion  shall be null and  void  with  respect  to  those  Preferred  Shares
submitted for redemption and for which the applicable  redemption  price has not
been paid and with respect to any Preferred  Shares  submitted in the future for
conversion in the same Redemption in Lieu of Conversion Period, (ii) the Company
shall  promptly,  but in no event later than one (1) day following such receipt,
return  any  Preferred  Shares  submitted  to the  Company  by each  holder  for
redemption under this Section 6 and for which the applicable Redemption Price of
Company  Redemption in Lieu of Conversion  has not been paid and (iii) the Fixed
Conversion  Price of such  returned  Preferred  Shares  shall be adjusted to the
lesser of (I) the Conversion  Price applicable to such conversion on the date on
which such Preferred  Shares were  originally  presented for conversion and (II)
the lowest  Conversion  Price which would have been in effect if such  Preferred
Shares were  presented  for  conversion  on any  Business  Day during the period
beginning on the Business Day  immediately  following  the last day on which the
Company  could have effected a timely  Company  Redemption in Lieu of Conversion
and ending on the date of the Company's  receipt of the applicable  Void Company
Redemption Notice.  Notwithstanding  the foregoing,  if the Company fails to pay
the applicable Redemption Price of Company Redemption in Lieu of Conversion to a
holder within the time period described in this Section 6(d) due to a dispute as
to the arithmetic  calculation of the Redemption Price of Company  Redemption in
Lieu of Conversion, such dispute shall be resolved pursuant to Section 2(f)(iii)
above  with  the  term  "Redemption  Price  of  Company  Redemption  in  Lieu of
Conversion"  being  substituted for the term  "Conversion  Rate." If the Company
fails to timely effect a Company  Redemption in Lieu of Conversion in accordance
with this Section 6, the Company shall not be allowed to submit  another  Notice
of Company Redemption in Lieu of Conversion without the prior written consent of
the holders of at least two-thirds of the Preferred Shares then outstanding.

                           (d)     Company Must Have Immediately Available Funds
or Credit  Facilities.  The Company  shall not be entitled to send any Notice of
Company  Redemption  in Lieu of  Conversion  pursuant to Section  6(b) above and
begin the redemption procedure under this Section 6, unless it has:

                                    (i)  the full amount of the Redemption Price
of Company  Redemption in Lieu of  Conversion in cash,  available in a demand or
other immediately available account in a bank or similar financial institution;

                                    (ii)  credit  facilities,  with  a  bank  or
similar financial  institutions that are immediately  available and unrestricted
for use in redeeming the Preferred  Shares, in the full amount of the Redemption
Price of Company Redemption in Lieu of Conversion;

                                    (iii) a  written  agreement  with a  standby
underwriter  or  qualified  buyer ready,  willing and able to purchase  from the
Company a sufficient number of shares of stock to provide proceeds  necessary to
redeem any Preferred Shares that are not converted prior to a Company Redemption
in Lieu of Conversion; or

                                      -30-



                                    (iv) a combination of the items set forth in
the preceding clauses (i), (ii)
and  (iii),  aggregating  the full  amount of the  Redemption  Price of  Company
Redemption in Lieu of Conversion.

                  (7) Redemption at the Company's Election. At any time or times
on or after the Initial  Issuance Date the Company shall have the right,  in its
sole discretion,  to require that all, but not less than all, of the outstanding
Preferred Shares be redeemed ("Redemption at Company's Election") at a price per
share which  would  provide a 20%  annualized  return on the  Liquidation  Value
("Company's  Election  Redemption  Price");  provided  that  the  Conditions  to
Redemption at the  Company's  Election (as set forth below) are  satisfied.  The
Company  shall  exercise  its  right to  Redemption  at  Company's  Election  by
providing each holder of Preferred  Shares written notice ("Notice of Redemption
at  Company's  Election")  at  least  20  trading  days  prior  to the  date  of
consummation of such redemption  ("Company's  Election  Redemption  Date").  The
Notice of Redemption at Company's Election shall indicate the Company's Election
Redemption  Date.  If the  Company  has  exercised  its right of  Redemption  at
Company's  Election and the conditions to such Redemption at Company's  Election
have been  satisfied,  then all Preferred  Shares  outstanding  at the Company's
Election  Redemption  Date  shall  be  redeemed  as of  the  Company's  Election
Redemption Date by payment by the Company to each holder of Preferred  Shares of
the Company's Election  Redemption Price. If required by Section 2(f)(vii),  all
holders of Preferred  Shares shall  thereupon and within two Business Days after
the Company's Election  Redemption Date, or such earlier date as the Company and
each holder of  Preferred  Shares  mutually  agree,  surrender  all  outstanding
Preferred Stock Certificates, duly endorsed for cancellation, to the Company. If
the  Company  fails to pay the full  Company's  Election  Redemption  Price with
respect to any Preferred Shares then the Redemption at Company's  Election shall
be null and void with  respect to such  Preferred  Shares and the holder of such
Preferred  Shares shall be entitled to all the rights of a holder of outstanding
Preferred Shares set forth in this  Certificate of Designations.  "Conditions to
Redemption at the Company's Election" means the following conditions: (i) during
the period  beginning on the Initial  Issuance  Date and ending on and including
the  Company's  Election  Redemption  Date,  the  Company  shall have  delivered
Conversion  Shares upon conversion of the Preferred Shares to the holders of the
Preferred  Shares on a timely  basis as set forth in  Section  2(f)(ii)  of this
Certificate  of  Designations;  provided,  however,  that for  purposes  of this
Section 6 only,  the Company shall be deemed to have satisfied the condition set
forth in this clause (i) if on not more than two occasions the Company failed to
meet the  requirements  of Section  2(g)(ii) by no more than three days; (ii) on
each day  during  the  period  beginning  30 days prior to the date of Notice of
Redemption  at Company's  Election  and ending on and  including  the  Company's
Election  Redemption  Date, the  Registration  Statement  shall be effective and
available  for the sale of no less  than  125% of the sum of (A) the  number  of
Conversion Shares then issuable upon the conversion of all outstanding Preferred
Shares (without  regard to any  limitations on conversion  herein or elsewhere),
including the Conversion  Shares to be issued pursuant to this Redemption at the
Company's  Election,  and (B) the number of Conversion Shares that are then held
by the  holders  of the  Preferred  Shares;  (iii) on each day during the period
beginning  30 days  prior to the  date of  Notice  of  Redemption  at  Company's
Election and ending on and including the Company's Election Redemption Date, the
Common Stock is designated for quotation on The Nasdaq National Market or listed
on  The  New  York  Stock  Exchange,  Inc.  and is not  suspended  from  trading
(excluding  suspensions  of not  more  than  one  day  resulting  from  business

                                      -31-


announcements);  (iv) during the period  beginning on the Initial  Issuance Date
and ending on and including the Company's Election  Redemption Date, there shall
not have occurred either (A) the consummation of a Major Transaction or a public
announcement  of a pending  Major  Transaction  which has not been  abandoned or
terminated  or (B) a  Triggering  Event;  and  (v)  the  Company  otherwise  has
satisfied its obligations in all material  respects and is not in default in any
material respect under this Certificate of Designations, the Securities Purchase
Agreement and the Registration Rights Agreement.  Notwithstanding the above, any
holder of Preferred Shares may convert such shares  (including  Preferred Shares
selected for redemption)  into Common Stock pursuant to Section 2(a) on or prior
to the date immediately preceding the Company's Election Redemption Date.

                  (8) Reissuance of Certificates.  Subject to Section 2(f)(vii),
in the event of a  conversion  or  redemption  pursuant to this  Certificate  of
Designations  of  less  than  all  of  the  Preferred  Shares  represented  by a
particular  Preferred Stock Certificate,  the Company shall promptly cause to be
issued and delivered to the holder of such  Preferred  Shares a preferred  stock
certificate  representing the remaining  Preferred Shares which have not been so
converted or redeemed.

                  (9)  Reservation of Shares.  The Company shall, so long as any
of the Preferred Shares are  outstanding,  reserve and keep available out of its
authorized  and unissued  Common Stock,  solely for the purpose of effecting the
conversion  of the  Preferred  Shares,  such number of shares of Common Stock as
shall from time to time be  sufficient  to effect the  conversion  of all of the
Preferred  Shares  then  outstanding  (without  regard  to  any  limitations  on
conversions);  provided  that the number of shares of Common  Stock so  reserved
shall at no time be less than 200% of the  number of shares of Common  Stock for
which the Preferred  Shares are at any time  convertible.  The initial number of
shares of Common Stock reserved for conversions of the Preferred Shares and each
increase in the number of shares so reserved  shall be allocated  pro rata among
the holders of the Preferred Shares based on the number of Preferred Shares held
by each holder at the time of issuance  of the  Preferred  Shares or increase in
the number of reserved  shares,  as the case may be. In the event a holder shall
sell  or  otherwise  transfer  any  of  such  holder's  Preferred  Shares,  each
transferee  shall be  allocated  a pro rata  portion of the  number of  reserved
shares of Common Stock reserved for such transferor.  Any shares of Common Stock
reserved and which remain  allocated to any person or entity which does not hold
any Preferred  Shares shall be allocated to the  remaining  holders of Preferred
Shares,  pro rata  based on the  number of  Preferred  Shares  then held by such
holder.

                  (10) Voting Rights.  Holders of Preferred Shares shall have no
voting  rights,  except as  required  by law,  including  but not limited to the
General  Corporation Law of the State of Delaware,  and as expressly provided in
this Certificate of Designations.

                  (11) Liquidation, Dissolution, Winding-Up. In the event of any
voluntary or involuntary liquidation,  dissolution or winding up of the Company,
the holders of the Preferred  Shares shall be entitled to receive in cash out of
the assets of the Company,  whether from capital or from earnings  available for
distribution  to its  stockholders  (the "Preferred  Funds"),  before any amount

                                      -32-


shall be paid to the holders of any of the  capital  stock of the Company of any
class junior in rank to the Preferred Shares in respect of the preferences as to
the distributions and payments on the liquidation, dissolution and winding up of
the Company,  an amount per Preferred  Share equal to the sum of (i) $10,000 and
(ii) the  Additional  Amount  (such sum being  referred  to as the  "Liquidation
Value");  provided that, if the Preferred Funds are insufficient to pay the full
amount due to the  holders of  Preferred  Shares and  holders of shares of other
classes or series of preferred  stock of the Company that are of equal rank with
the  Preferred  Shares as to  payments  of  Preferred  Funds  (the  "Pari  Passu
Shares"),  then each  holder of  Preferred  Shares and Pari Passu  Shares  shall
receive  a  percentage  of the  Preferred  Funds  equal  to the full  amount  of
Preferred  Funds  payable  to  such  holder  as  a  liquidation  preference,  in
accordance with their respective  Certificate of  Designations,  Preferences and
Rights,  as a percentage  of the full amount of Preferred  Funds  payable to all
holders of Preferred Shares and Pari Passu Shares. The purchase or redemption by
the Company of stock of any class,  in any manner  permitted by law,  shall not,
for the purposes hereof, be regarded as a liquidation, dissolution or winding up
of the Company.  Neither the consolidation or merger of the Company with or into
any  other  Person,  nor the  sale  or  transfer  by the  Company  of less  than
substantially all of its assets, shall, for the purposes hereof, be deemed to be
a liquidation,  dissolution or winding up of the Company. No holder of Preferred
Shares shall be entitled to receive any amounts  with  respect  thereto upon any
liquidation,  dissolution  or winding up of the  Company  other than the amounts
provided  for  herein;  provided  that a holder  of  Preferred  Shares  shall be
entitled  to all  amounts  previously  accrued  with  respect  to  amounts  owed
hereunder.

                  (12) Preferred Rank; Participation. All shares of Common Stock
shall be of junior rank to all Preferred Shares in respect to the preferences as
to distributions  and payments upon the liquidation,  dissolution and winding up
of the Company. The rights of the shares of Common Stock shall be subject to the
preferences  and  relative  rights of the  Preferred  Shares.  Without the prior
express  written  consent of the holders of not less than two-thirds of the then
outstanding Preferred Shares, the Company shall not hereafter authorize or issue
additional  Preferred Shares or other capital stock that is of rank senior to or
pari  passu  with the  Preferred  Shares in  respect  of the  preferences  as to
distributions  and payments upon the liquidation,  dissolution and winding up of
the Company.  Without the prior  express  written  consent of the holders of not
less than two-thirds of the then outstanding Preferred Shares, the Company shall
not hereafter  authorize or make any amendment to the Company's  Certificate  of
Incorporation or bylaws, or file any resolution of the board of directors of the
Company  with the  Secretary  of State of the State of Delaware  containing  any
provisions,  which  would  adversely  affect or  otherwise  impair the rights or
relative priority of the holders of the Preferred Shares relative to the holders
of the Common Stock or the holders of any other class of capital  stock.  In the
event  of the  merger  or  consolidation  of the  Company  with or into  another
corporation,   the  Preferred  Shares  shall  maintain  their  relative  powers,
designations  and  preferences  provided  for herein and no merger  shall result
inconsistent therewith.

                  (13) Restriction on Redemption and Cash Dividends with respect
to Other Capital Stock. Until all of the Preferred Shares have been converted or
redeemed as provided  herein,  the Company  shall not,  directly or  indirectly,
redeem, or declare or pay any cash dividend or distribution on, its Common Stock
without  the prior  express  written  consent  of the  holders  of not less than
two-thirds of the then outstanding Preferred Shares.

                                      -33-



                  (14)    Limitation   on   Number   of    Conversion    Shares.
Notwithstanding  any other provision herein,  the Company shall not be obligated
to issue any shares of Common Stock upon  conversion of the Preferred  Shares if
the  issuance of such shares of Common  Stock would exceed that number of shares
of Common  Stock which the Company may issue upon  Conversion  of the  Preferred
Shares (the "Exchange Cap") without breaching the Company's obligations, if any,
under the rules or  regulations  of The Nasdaq Stock Market or such  exchange on
which the stock is then traded,  except that such limitation  shall not apply in
the event that the  Company (a) obtains  the  approval  of its  stockholders  as
required by applicable  rules and regulations of The Nasdaq Stock Market or such
other  exchange on which the stock is then traded for  issuances of Common Stock
in excess of such amount, (ii) obtains a written opinion from outside counsel to
the  Company  that  such  approval  is not  required,  which  opinion  shall  be
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares
then outstanding or (iii) the required number of holders of the Preferred Shares
exercised  their rights  pursuant to Section 4(e) to have the Company remove the
Common Stock from quotation in the Nasdaq National Market or such other exchange
on which the stock is then  traded.  Until such  approval or written  opinion is
obtained or such  action has been taken by the  required  number of holders,  no
purchaser of Preferred Shares pursuant to the Securities Purchase Agreement (the
"Purchasers")  shall be issued,  upon conversion of Preferred Shares,  shares of
Common  Stock in an amount  greater  than the  product of (i) the  Exchange  Cap
amount  multiplied  by (ii) a fraction,  the numerator of which is the number of
Preferred  Shares issued to such Purchaser  pursuant to the Securities  Purchase
Agreement  and the  denominator  of which  is the  aggregate  amount  of all the
Preferred  Shares issued to the Purchasers  pursuant to the Securities  Purchase
Agreement (the "Cap Allocation  Amount").  In the event that any Purchaser shall
sell  or  otherwise  transfer  any of such  Purchaser's  Preferred  Shares,  the
transferee  shall  be  allocated  a pro rata  portion  of such  Purchaser's  Cap
Allocation  Amount.  In the event  that any  holder of  Preferred  Shares  shall
convert all of such holder's  Preferred Shares into a number of shares of Common
Stock which, in the aggregate, is less than such holder's Cap Allocation Amount,
then the difference  between such holder's Cap Allocation  Amount and the number
of shares of Common Stock  actually  issued to such holder shall be allocated to
the  respective  Cap  Allocation  Amounts of the remaining  holders of Preferred
Shares on a pro rata basis in proportion to the number of Preferred  Shares then
held by each such holder.

                  (15) Vote to Change  the Terms of or Issue  Preferred  Shares.
The  affirmative  vote at a meeting  duly called for such purpose or the written
consent  without a meeting,  of the holders of not less than  two-thirds  of the
then outstanding  Preferred Shares, shall be required for (a) any change to this
Certificate of Designations or the Company's  Certificate of Incorporation which
would  amend,  alter,  change  or  repeal  any  of  the  powers,   designations,
preferences and rights of the Preferred Shares, or (b) any issuance of Preferred
Shares other than pursuant to the Securities Purchase Agreement.

                  (16) Lost or Stolen Certificates.  Upon receipt by the Company
of evidence  satisfactory  to the  Company of the loss,  theft,  destruction  or
mutilation  of any  Preferred  Stock  Certificates  representing  the  Preferred
Shares,  and, in the case of loss, theft or destruction,  of an  indemnification
undertaking  by the holder to the Company and, in the case of  mutilation,  upon
surrender and  cancellation of the Preferred Stock  Certificate(s),  the Company

                                      -34-


shall execute and deliver new preferred stock  certificate(s)  of like tenor and
date;  provided,  however,  the  Company  shall  not be  obligated  to  re-issue
preferred  stock  certificates  if the  holder  contemporaneously  requests  the
Company to convert such Preferred Shares into Common Stock.

                  (17) Remedies, Characterizations,  Other Obligations, Breaches
and Injunctive Relief. The remedies provided in this Certificate of Designations
shall be cumulative and in addition to all other remedies  available  under this
Certificate of Designations, at law or in equity (including a decree of specific
performance and/or other injunctive relief), no remedy contained herein shall be
deemed a waiver of compliance with the provisions giving rise to such remedy and
nothing  herein shall limit a holder's  right to pursue  actual  damages for any
failure  by the  Company  to  comply  with  the  terms  of this  Certificate  of
Designations.  The Company  covenants  to each holder of  Preferred  Shares that
there shall be no  characterization  concerning  this  instrument  other than as
expressly  described  herein.  Amounts  set forth or  provided  for herein  with
respect to payments, conversion and the like (and the computation thereof) shall
be the  amounts to be received  by the holder  thereof and shall not,  except as
expressly provided herein, be subject to any other obligation of the Company (or
the performance  thereof).  The Company  acknowledges that a breach by it of its
obligations  hereunder  will  cause  irreparable  harm  to  the  holders  of the
Preferred  Shares  and  that  the  remedy  at law for  any  such  breach  may be
inadequate.  The Company  therefore agrees that, in the event of any such breach
or threatened breach, the holders of the Preferred Shares shall be entitled,  in
addition to all other  available  remedies,  to an  injunction  restraining  any
breach,  without the necessity of showing  economic loss and without any bond or
other security being required.

                  (18)  Specific  Shall  Not  Limit  General;  Construction.  No
specific provision  contained in this Certificate of Designations shall limit or
modify  any  more  general  provision  contained  herein.  This  Certificate  of
Designations  shall be deemed  to be  jointly  drafted  by the  Company  and all
holders of Preferred Shares and shall not be construed against any person as the
drafter hereof.

                  (19) Failure or Indulgence Not Waiver.  No failure or delay on
the part of a holder of Preferred Shares in the exercise of any power,  right or
privilege  hereunder shall operate as a waiver thereof,  nor shall any single or
partial exercise of any such power, right or privilege preclude other or further
exercise thereof or of any other right, power or privilege.

                  (20)  Whenever  notice is  required  to be given,  it shall be
given in accordance with Section 9(f) of the Securities Purchase Agreement.

                                   * * * * * *

                                      -35-




         IN  WITNESS  WHEREOF,  the  Company  has  caused  this  Certificate  of
Designations  to be  signed  by  Robert J.  DeLuccia,  its  President  and Chief
Executive Officer as of December __, 1998.

                                                     IMMUNOMEDICS, INC.



                                                    By:
                                                    Name:    Robert J. DeLuccia
                                                    Title:   President and Chief
                                                             Executive Officer






                                    EXHIBIT I
                               IMMUNOMEDICS, INC.
                                CONVERSION NOTICE

Reference is made to the Certificate of Designations,  Preferences and Rights of
Series F Convertible  Preferred Stock (the  "Certificate of  Designations").  In
accordance with and pursuant to the Certificate of Designations, the undersigned
hereby elects to convert the number of shares of Series G Convertible  Preferred
Stock, par value $.01 per share (the "Preferred Shares"), of Immunomedics, Inc.,
a Delaware  corporation (the  "Company"),  indicated below into shares of Common
Stock,  par value  $.01 per share  (the  "Common  Stock"),  of the  Company,  by
tendering the stock  certificate(s)  representing the Preferred Shares specified
below as of the date specified below.

         Date of Conversion:____________________________________________________

         Number of Preferred Shares to be converted:____________________________

         Stock certificate no(s). of Preferred Shares to be converted:__________

Please confirm the following information:

         Conversion Price:______________________________________________________

         Number of shares of Common Stock
         to be issued:__________________________________________________________

Please  issue the  Common  Stock  into  which  the  Preferred  Shares  are being
converted  and, if  applicable,  any check drawn on an account of the Company in
the following name and to the following address:

         Issue to:______________________________________________________________
                  ______________________________________________________________
                  ______________________________________________________________
                  ______________________________________________________________

         Facsimile Number:______________________________________________________

         Authorization:_________________________________________________________
                                                     By:________________________
                                                     Title:_____________________

         Dated:_________________________________________________________________

         Account Number:
           (if electronic book entry transfer):_________________________________

         Transaction Code Number
           (if electronic book entry transfer):_________________________________

             THIS FORM MUST BE SENT CONCURRENTLY TO COMPANY COUNSEL





                                 ACKNOWLEDGMENT


         The  Company  hereby  acknowledges  this  Conversion  Notice and hereby
directs  American  Stock  Transfer & Trust Company to issue the above  indicated
number  of  shares  of  Common  Stock  in  accordance  with the  Transfer  Agent
Instructions  dated  December  ___, 1998 from the Company and  acknowledged  and
agreed to by American Stock Transfer & Trust Company.

                                                     IMMUNOMEDICS, INC.



                                                     By:

                                                     Name:   Robert J. DeLuccia
                                                     Title:  President and Chief
                                                             Executive Officer