WESTERN BUSINESS PARK
STANDARD  OFFICE  LEASE - MODIFIED  GROSS1.  Parties.  This  Lease,  dated,  for
reference  purposes  only,  December  13, 1994,  is made by and between  WESTERN
BUSINESS  PARK  ASSOCIATES  (herein  called  "Lessor")  and Immecor  Corporation
(herein called "Lessee").

     2.  Premises.  Lessor hereby leases to Lessee and Lessee leases from Lessor
for the term, at the rental,  and upon all of the  conditions  set forth herein,
that  certain  real  property  situated  in  the  County  of  Sonoma,  State  of
California, commonly known as 100 Professional Center Dr., Ste 105 Rohnert Park,
California  and  described as Office suite of  approximately  2691 Sg. Ft.. Said
real property including the land and all improvements  therein, is herein called
"the Premises".

3. Term.
          3.1 Term.  The term of this Lease shall be for 3 Years  commencing  on
February  1, 1995 and  ending on  January  31,  1998  unless  sooner  terminated
pursuant to any provision hereof.
          3.2 Delay in Possession.  Notwithstanding  said commencement  date, if
for any reason  Lessor  cannot  deliver  possession of the Premises to Lessee on
said date, Lessor shall not be subject to any liability therefor, nor shall such
failure affect the validity of this Lease or the obligations of Lessee hereunder
or extend the term hereof but in such case, Lessee shall not be obligated to pay
rent until possession of the Premises is tendered to Lessee; provided,  however,
that if Lessor shall not have delivered  possession of the Premises within sixty
(60) days from said commencement date, Lessee may, at Lessee's option, by notice
in writing to Lessor  within ten (10) days  thereafter,  cancel this  Lease,  in
which event the parties  shall be  discharged  from all  obligations  hereunder;
provided further, however, that if such written notice of Lessee is not received
by Lessor within said ten (10) day period,  Lessee's  right to cancel this Lease
hereunder shall terminate and be of no further force or effect.
     3.3  Early  Possession.  If  Lessee  occupies  the  Premises  prior to said
commencement  date,  such occupancy  shall be subject to all provisions  hereof,
such occupancy shall not advance the termination date, and Lessee shall pay rent
for such period at the initial  monthly rates set forth below.  Lessee to occupy
space as of 12/15/94 for purposes of work on Tenant Improvements.  Rent to begin
as 4. Rent. specified in ~4.
          4.1 Base Rent.  Lessee  shall pay to Lessor as rent for the  Premises,
monthly payments of $See Addendum,  in advance,  on the 1st day of each month of
the term hereof.  Lessee shall pay Lessor upon the execution  hereof $1883.70 as
rent for the period February 1, 1995 thru February 28, 1995.

Rent for any  period  during  the term  hereof  which is for less than one month
shall be a pro rata portion of the monthly installment. Rent shall be payable in
lawful money of the United  States to Lessor at the address  stated herein or to
such other persons or at such other

                                                             --1--







places as Lessor may designate in writing.
4.2 Escalation of Base Rent.  The base annual rent and the monthly  installments
to be paid  hereunder  shall be adjusted  upward  during any lease term,  with a
minimum  annual  increase of 4.0%'and a maximum  annual  increase of 7.0%,  by a
percentage equal to the percentage increase' if any, in the Consumer Price Index
for the San Francisco  Oakland  metropolitan  Area, All Items,  1967 Base = 100,
(CPI)  issued  by the  Bureau  of Labor  Statistics.  the base  CPI  figure  for
computing  any such increase (in excess of the 4.0% minimum  increase)  shall be
the figure published in the Current Labor statistic section of the Monthly Labor
Review for the quarter  year in which the  payment of the base rental  commenced
hereunder.  The escalator CPI figure shall be the last figure so published prior
to the lapse of twelve (12) months of the lease term.  Any  increase in the base
rental  found to be due  because of such  increase  shall  apply to the  ensuing
months of the lease  term  subject  to like  adjustment  at  twelve  (12)  month
intervals thereafter.
          If  publication of the CPI shall be  discontinued,  the parties hereto
shall  substitute  any  official  index  published  by the U.S.  Bureau of Labor
Statistics,  or  successor  or  similar  government  agency,  as may  then be in
existence and shall be most nearly equivalent  thereto.  If the parties shall be
unable to agree upon a successor  index, the parties shall refer the choice of a
successor  index to  arbitration  in  accordance  with the rules of the American
Arbitration Association then in effect.

5.  Security  Deposit.  Lessee shall deposit with Lessor upon  execution  hereof
$3,932.15 as security for Lessee's faithful  performance of Lessee's obligations
hereunder.  If  Lessee  fails to pay rent or other  charges  due  hereunder,  or
otherwise defaults with respect to any provision of this Lease,  Lessor may use,
apply or retain all or any  portion of said  deposit for the payment of any rent
or other  charge in default or for the payment of any other sum to which  Lessor
may become obligated by reason of Lessee's default,  or to compensate Lessor for
any loss or damage which Lessor may suffer thereby. If Lessor so uses or applies
all or any  portion of said  deposit,  Lessee  shall  within ten (10) days after
written  demand  therefor  deposit cash with Lessor in an amount  sufficient  to
restore said deposit to the full amount  hereinabove stated and Lessee's failure
to do so shall be a material breach of this Lease.  Lessor shall not be required
to keep said deposit separate from its general accounts.  If Lessee performs all
of Lessee's obligations  hereunder,  said deposit, or so much thereof as has not
theretofore  been  applied  by Lessor,  shall be  returned,  without  payment of
interest or other increment for its use, to Lessee (or, at Lessor's  option,  to
the last assignee if any, of Lessee's  interest  hereunder) at the expiration of
the term hereof and after Lessee has vacated the Premises. No trust relationship
is  created  herein  between  Lessor and Lessee  with  respect to said  Security
Deposit.

6. Use.
    6.1 Use. The Premises shall be used and occupied only for

                                                             --2--








General  Office Use,  Computer  Sales,  Furniture Sale or any other use which is
reasonably comparable and for no other purpose. 6.2 Compliance with Law.
              (a) Lessor  warrants  to Lessee  that the  Premises,  in its state
existing on the date that the Lease term  commences,  but without  regard to the
use for which Lessee will use the  Premises,  does not violate any  covenants or
restrictions of record, or any applicable building code, regulation or ordinance
in effect on such Lease term  commencement  date.  In the event it is determined
that this  warranty has been  violated,  then it shall be the  obligation of the
Lessor, after written notice from Lessee, to promptly, at Lessor's sole cost and
expense, rectify any such violation. In the event Lessee does not give to Lessor
written notice of the violation of this warranty within six months from the date
that the Lease term commences, the correction of same shall be the obligation of
the Lessee at Lessee's  sole cost.  The  warranty  contained  in this  paragraph
6.2(a)  shall be of no  force or  effect  if,  prior to the date of this  Lease,
Lessee was the owner or occupant  of the  premises,  and, in such event,  Lessee
shall correct any such violation at Lessee's sole cost.
              (b) Except as  provided  in  paragraph  6.2(a)  Lessee  shall,  at
Lessee's expense comply promptly with all applicable statutes, ordinances rules,
regulations,  orders,  covenants and restrictions of record, and requirements in
effect  during  the term or any part of the term  hereof  regulating  the use by
Lessee of the Premises,  Lessee shall not use nor permit the use of the Premises
in any manner that will tend to create waste or a nuisance or, if there shall be
more than one tenant in the  building  containing  the  Premises,  shall tend to
disturb such other tenants. 6.3 Condition of Premises.
              (a) Lessor shall  deliver the Premises to Lessee clean and free of
debris on Lease  commencement  date (unless Lessee is already in possession) and
Lessor further warrants to Lessee that the plumbing, lighting, air conditioning,
heating,  and loading doors in the Premises shall be in good operating condition
on the Lease  commencement  date. In the event that it is  determined  that this
warranty has been  violated,  then it shall be the  obligation of Lessor,  after
receipt of written notice from Lessee setting forth with  specificity the nature
of the violation,  to promptly,  at Lessor's sole cost,  rectify such violation.
Lessee's  failure to give such written  notice to Lessor within thirty (30) days
after the Lease  commencement  date shall cause the conclusive  presumption that
Lessor has complied  with all of Lessor's  obligations  hereunder.  The warranty
contained  in this  paragraph  6.3(a) shall be of no force or effect if prior to
the date of this Lease, Lessee was the owner or occupant of the Premises.
              (b) Except as  otherwise  provided  in this Lease,  Lessee  hereby
accepts the Premises in their  condition  existing as of the Lease  commencement
date or the date that Lessee  takes  possession  of the  Premises,  whichever is
earlier,  subject to all applicable  zoning,  municipal,  county and state laws,
ordinances and regulations governing and regulating the use of the Premises, and
any covenants or  restrictions  of record and accepts this Lease subject thereto
and to all matters disclosed thereby and by any exhibits attached hereto. Lessee
acknowledges that neither Lessor nor Lessor's agent has made any



                                                             --3--

representation or warranty as to the present or future suitability of the
Premises for the conduct of Lessee's business.
7. Maintenance, Repairs and Alterations.
          7.1 Lessor's  Obligations.  Subject to the provisions of Paragraphs 6,
7.2, and 9 and except for damage caused by any negligent or  intentional  act or
omission  of Lessee,  Lessee's  agents,  employees,  or  invitees in which event
Lessee shall repair the damage,  Lessor,  at Lessor's expense shall keep in good
order,  condition and repair all exterior  surfaces of the Premises,  all Lessor
installed  plumbing,  heating,  air  conditioning,  ventilating,  electrical and
lighting equipment within the Premises, and all landscaping,  driveways, parking
lots,  fences, and non-Lessee  specific signing located in the Premises.  Lessor
shall not  however be  obligated  to paint such  exterior,  nor shall  Lessor be
required to maintain the interior surface of exterior walls,  windows,  doors or
plate  glass.  Lessor  shall  have no  obligation  to make  repairs  under  this
Paragraph  7.1 until a reasonable  time after  receipt of written  notice of the
need for such repairs.  Lessee  expressly waives the benefits of any statute now
or  hereafter in effect which would  otherwise  afford  Lessee the right to make
repairs at  Lessor's  expense or to  terminate  this Lease  because of  Lessor's
failure to keep the Premises in good order, condition and repair.
7.2 Lessee's Obligations.
              (a) Subject to the  provisions of Paragraphs 6, 7.1 and 9, Lessee,
at Lessee's expense, shall keep in good order, condition and repair the interior
surfaces of the demised premises,  including, without limiting the generality of
the foregoing, all interior walls, ceilings, floor coverings, fixtures, windows,
doors,  plate glass,  and  skylights,  located  within the  Premises,  and shall
surrender  same at the  expiration  of the term hereof in as good  condition  as
received,  normal wear and tear  excepted.  However,  Lessee  shall not have the
responsibility  to replace  any  exterior  building  glass  unless the  breaking
thereof is due to an action of the Lessee, Lessee's employees,  invitees, and/or
customers.
              (b) If Lessee  fails to perform  Lessee's  obligations  under this
Paragraph 7.2 or under any other paragraph of this Lease, Lessor may at Lessor's
option enter upon the  Premises  after 10 days' prior  written  notice to Lessee
(except in the case of  emergency,  in which case no notice shall be  required),
perform such  obligations on Lessee's behalf and put the Premises in good order,
condition and repair, and the cost thereof together with interest thereon at the
maximum rate then  allowable by law shall be due and payable as additional  rent
to Lessor together with Lessee's next rental installment.
              (c)  On  the  last  day  of the  term  hereof,  or on  any  sooner
termination, Lessee shall surrender the Premises to Lessor in the same condition
as received,  ordinary wear and tear excepted,  clean and free of debris. Lessee
shall  repair any  damage to the  Premises  occasioned  by the  installation  or
removal  of its  trade  fixtures,  furnishings  and  equipment.  Notwithstanding
anything to the contrary otherwise stated in this Lease,  Lessee shall leave the
air lines, power panels,  electrical  distribution  systems,  lighting fixtures,
space heaters, air conditioning, and plumbing on the premises in good

- --4--





operating condition.7.3  Alterations and Additions.(a) Lessee shall not, without
Lessor's prior written consent make any alterations, improvements, additions, or
utility  installations  in, on or about the Premises,  except for  nonstructural
alterations  not exceeding  $2,500 in  cumulative  costs during the term of this
Lease.  In any  event,  whether or not in excess of $2,500 in  cumulative  cost,
Lessee  shall make no change or  alteration  to the exterior of the Premises nor
the exterior of the building(s) on the Premises  without  Lessor's prior written
consent.  As used in this  Paragraph 7.3 the term "Utility  installation"  shall
mean  carpeting,   window  coverings,   air  lines,  power  panels,   electrical
distribution  systems,  lighting  fixtures,  space  heaters,  air  conditioning,
plumbing, and fencing.  Lessor may require that Lessee remove any or all of said
alterations,  improvements, additions or utility installations at the expiration
of the term,  and restore the  Premises  to their  prior  condition.  Lessor may
require Lessee to provide Lessor, at Lessee's sole cost and expense,  a lien and
completion  bond in an amount equal to one and one-half times the estimated cost
of such improvements,  to insure Lessor against any liability for mechanic's and
materialmen's liens and to insure completion of the work. Should Lessee make any
alterations,  improvements, additions or Utility Installations without the prior
approval  of Lessor,  Lessor may require  that  Lessee  remove any or all of the
same.
              (b)  Any   alterations,   improvements,   additions   or   Utility
Installations  in, or about the  Premises  that Lessee  shall desire to make and
which requires the consent of the Lessor shall be presented to Lessor in written
form,  with  proposed  detailed  plans.  If Lessor shall give its  consent,  the
consent shall be deemed conditioned upon Lessee acquiring a permit to do so from
appropriate  governmental  agencies,  the furnishing of a copy thereof to Lessor
prior to the  commencement  of the  work and the  compliance  by  Lessee  of all
conditions of said permit in a prompt and expeditious manner.
              (c) Lessee shall pay,  when due, all claims for labor or materials
furnished  or alleged to have been  furnished to or for Lessee at, or for use in
the  Premises,  which  claims  are or  may  be  secured  by  any  mechanics'  or
materialmen's  lien against the Premises or any interest  therein.  Lessee shall
give Lessor not less than ten (10) days' notice prior to the commencement of any
work in the  Premises,  and  Lessor  shall  have the  right to post  notices  of
non-responsibility in or on the Premises as provided by law. If Lessee shall, in
good faith,  contest the validity of any such lien, claim or demand, then Lessee
shall,  at its sole expense  defend itself and Lessor against the same and shall
pay and satisfy any such adverse  judgment that may be rendered  thereon  before
the enforcement  thereof against the Lessor or the Premises,  upon the condition
that if Lessor  shall  require,  Lessee  shall  furnish to Lessor a surety  bond
satisfactory to Lessor in an amount equal to such contested lien claim or demand
indemnifying Lessor against liability for the same and holding the Premises free
from the effect of such lien or claim. In addition, Lessor may require Lessee to
pay Lessor's  attorneys fees and costs in participating in such action if Lessor
shall decide it is to its best interest to do so.

                                                             --5--








(d) Unless Lessor requires their removal,  as set forth in Paragraph 7.3(a), all
alterations,  improvements,  additions and Utility Installations (whether or not
such Utility  Installations  constitute trade fixtures of Lessee),  which may be
made on the Premises, shall become the property of Lessor and remain upon and be
surrendered with the Premises at the expiration of the term. Notwithstanding the
provisions of this Paragraph  7.3(d),  Lessee's  machinery and equipment,  other
than that which is affixed to the Premises so that it cannot be removed  without
material damage to the Premises,  shall remain the property of Lessee and may be
removed by Lessee subject to the provisions of Paragraph 7.2(c).

8. Insurance; Indemnity.
          8.1 Liability  Insurance - Lessee.  Lessee shall, at Lessee's expense,
obtain  and keep in force  during  the term of this  Lease a policy of  Combined
Single Limit Bodily Injury and Property  Damage  Insurance  insuring  Lessee and
Lessor against any liability arising out of the use, occupancy or maintenance of
the Premises and any other areas appurtenant thereto. Such insurance shall be in
an amount  not less than  $500,000  per  occurrence.  The  policy  shall  insure
performance  by Lessee of the  indemnity  provisions  of this  Paragraph  8. The
limits of said  insurance  shall not,  however,  limit the  liability  of Lessee
hereunder.
          8.2  Liability  Insurance - Lessor.  Lessor  shall  obtain and keep in
force  during the term of this Lease a policy of Combined  Single  Limit  Bodily
Injury and Property Damage  Insurance,  insuring Lessor but not Lessee,  against
any liability arising out of the ownership, use, occupancy or maintenance of the
Premises and all areas  appurtenant  thereto in an amount not less than $5oo,ooo
per occurrence.
          8.3 Property  Insurance.  Lessor shall obtain and keep in force during
the term of this Lease a policy or policies of insurance covering loss or damage
to the Premises, but not Lessee's fixtures,  equipment or tenant improvements in
an amount  not to exceed the full  replacement  value  thereof,  as the same may
exist from time to time, providing protection against all perils included within
the classification of fire,  extended coverage,  vandalism,  malicious mischief,
flood (in the event same is required by a lender  having a lien on the Premises)
special  extended  perils  ("all  risk",  as such term is used in the  insurance
industry) but not plate glass  insurance.  In addition,  the Lessor shall obtain
and keep in force,  during  the term of this  Lease,  a policy  of rental  value
insurance  covering a period of one year,  with loss  payable  to Lessor,  which
insurance  shall also cover all real estate taxes and  insurance  costs for said
period. 8.4 Payment of Premium Increase.
              (a)  Lessee  shall  pay to  Lessor,  during  the term  hereof,  in
addition to the rent, the amount,  of any increase in premiums for the insurance
required  under  Paragraphs 8.2 and 8.3 over and above such premiums paid during
the Base Period, as hereinafter defined,  whether such premium increase shall be
the result, of the nature of Lessee's occupancy,  any act or omission of Lessee,
requirements of the holder of a mortgage or deed of trust covering the Premises,
increased  valuation of the Premises,  or general rate  increases.  In the event
that the Premises have been occupied previously, the words "Base Period"

- --6--





shall mean the last twelve months of the prior occupancy.  In the event that the
Premises  have never been  previously  occupied,  the premiums  during the "Base
Period" shall be deemed to be the lowest premiums reasonably obtainable for said
insurance assuming the most nominal use of the Premises.  Provided,  however, in
lieu of the Base  Period,  the parties may insert a dollar  amount at the end of
this sentence which figure shall be considered as the insurance  premium for the
Base Period:  $$2947. In no event, however,  shall Lessee be responsible for any
portion of the premium  cost  attributable  to liability  insurance  coverage in
excess of $1,000,000 procured under paragraph 8.2.
              (b) Lessee shall pay any such premium  increases to Lessor  within
30 days after  receipt by Lessee of a copy of the premium  statement  or further
satisfactory  evidence of the amount due. If the insurance  policies  maintained
hereunder  cover other  improvements  in addition to the Premises,  Lessor shall
also deliver to Lessee a statement of the amount of such  increase  attributable
to the  Premises  and  showing in  reasonable  detail,  the manner in which such
amount was  computed.  If the term of this Lease  shall not expire  concurrently
with the expiration of the period covered by such insurance,  Lessee's liability
for premium increases shall be prorated on an annual basis.
              (c) If the  Premises  are part of a larger  building,  then Lessee
shall not be  responsible  for paying any  increase  in the  property  insurance
premium  caused by the acts or  omissions of any other tenant of the building of
which the Premises are a part.
          8.5  Insurance  Policies.  Insurance  required  hereunder  shall be in
companies holding a "General  Policyholders  Rating" of at least B plus, or such
other rating as may be required by a lender  having a lien on the  Premises,  as
set forth in the most current issue of "Best's  Insurance  Guide".  Lessee shall
deliver to Lessor  copies of  policies of  liability  insurance  required  under
Paragraph  8.1 or  certificates  evidencing  the  existence  and amounts of such
insurance.  No such  policy  shall be  cancellable  or subject to  reduction  of
coverage or other  modification  except  after  thirty  (30) days prior  written
notice  to  Lessor.  Lessee  shall,  at  least  thirty  (30)  days  prior to the
expiration of such policies,  furnish Lessor with renewals or "binders" thereof,
or Lessor may order such insurance and charge the cost thereof to Lessee,  which
amount shall be payable by Lessee upon demand.  Lessee shall not do or permit to
be done anything which shall  invalidate the insurance  policies  referred to in
Paragraph 8.3.
          8.6 Waiver of  Subrogation.  Lessee and Lessor each hereby release and
relieve the other,  and waive their entire  right of recovery  against the other
for loss or damage  arising  out of or incident  to the perils  insured  against
under  paragraph 8.3,  which perils occur in, on or about the Premises,  whether
due  to  the  negligence  of  Lessor  or  Lessee  or  their  agents,  employees,
contractors  and/or  invitees.  Lessee  and Lessor  shall,  upon  obtaining  the
policies of insurance required  hereunder,  give notice to the insurance carrier
or carriers that the foregoing mutual waiver of subrogation is contained in this
Lease.
     8.7  Indemnity.  Lessee shall  indemnify and hold harmless  Lessor from and
against any and all claims  arising from Lessee's use of the  Premises,  or from
the conduct of Lessee's business or from any

                                                             --7--









activity,  work or things done,  permitted or suffered by Lessee in or about the
Premises or elsewhere and shall further  indemnify and hold harmless Lessor from
and  against  any and all  claims  arising  from any  breach or  default  in the
performance of any  obligation on Lessee's part to be performed  under the terms
of this Lease,  arising from any  negligence  of the Lessee,  or any of Lessee's
agents,  contractors,  or employees,  and from and against all costs, attorney's
fees, expenses and liabilities  incurred in the defense of any such claim or any
action or proceeding  brought  thereon;  and in case any action or proceeding be
brought  against Lessor by reason of any such  consideration  to Lessor,  hereby
assumes all risk of damage to  property or injury to persons,  in, upon or about
the  Premises  arising  from any cause and  Lessee  hereby  waives all claims in
respect thereof against Lessor.
          8.8  Exemption of Lessor from  Liability.  Lessee  hereby  agrees that
Lessor shall not be liable for injury to Lessee's business or any loss of income
therefrom or for damage to the goods,  wares,  merchandise  or other property of
Lessee, Lessee's employees, invitees, customers, or any other person in or about
the  Premises,  nor shall  Lessor be liable  for injury to the person of Lessee,
Lessee's  employees,  agents or  contractors,  whether  such damage or injury is
caused by or results from fire, steam, electricity,  gas, water or rain, or from
the breakage, leakage, obstruction or other defects of pipes, sprinklers, wires,
appliances,  plumbing,  air conditioning or lighting fixtures, or from any other
cause,  whether the said damage or injury results from  conditions  arising upon
the Premises or upon other  portions of the building of which the Premises are a
part,  or from other  sources or places and  regardless  of whether the cause of
such  damage or injury or the means of  repairing  the same is  inaccessible  to
Lessee.  Lessor  shall not be liable  for any  damages  arising  from any act or
neglect of any other  tenant,  if any, of the building in which the Premises are
located.

9. Damage or Destruction.
9.1 Definitions.
              (a)  "Premises   Partial  Damage"  shall  herein  mean  damage  or
destruction  to the  Premises to the extent that the cost of repair is less than
50% of the fair market value of the Premises immediately prior to such damage or
destruction.  "Premises  Building  Partial  Damage"  shall herein mean damage or
destruction  to the building of which the Premises are a part to the extent that
the cost of repair,  is less than 50% of the fair market value of such  building
as a whole immediately prior to such damage or destruction.
              (b)  "Premises  Total  Destruction"  shall  herein  mean damage or
destruction to the Premises to the extent that the cost of repair is 50% or more
of the fair market  value of the  Premises  immediately  prior to such damage or
destruction.  "Premises  Building Total Destruction" shall herein mean damage or
destruction  to the building of which the Premises are a part to the extent that
the cost of repair is SO% or more of the fair market value of such building as a
whole immediately prior to such damage or destruction.
              (c) "Insured Loss" shall herein mean damage or  destruction  which
was caused by an event  required  to be covered by the  insurance  described  in
paragraph 8.



                                                             --8--







9.2 Partial Damage - Insured Loss.  Subject to the provisions of paragraphs 9.4,
9.5 and 9.6, if at anytime  during the term of this Lease there is damage  which
is an Insured Loss and which falls into the  classification  of Premises Partial
Damage or Premises Building Partial Damage,  then Lessor shall, at Lessor's sole
cost,  repair  such  damage,  but not  Lessee's  fixtures,  equipment  or tenant
improvements,  as soon as reasonably  possible and this Lease shall  continue in
full force and effect.
          9.3 Partial  Damage - Uninsured  Loss.  Subject to the  provisions  of
Paragraphs  9.4, 9.5 and 9.6, if at any time during the term of this Lease there
is damage which is not an Insured Loss and which falls within the classification
of Premises Partial Damage or Premises Building Partial Damage, unless caused by
a  negligent  or willful  act of Lessee (in which  event  Lessee  shall make the
repairs at Lessee's  expense),  Lessor may at Lessor's  option either (i) repair
such damage as soon as reasonably  possible at Lessor's expense,  in which event
this Lease shall continue in full force and effect,  or (ii) give written notice
to Lessee  within  thirty  (30) days  after the date of the  occurrence  of such
damage of Lessor's  intention to cancel and terminate this Lease, as of the date
of the occurrence of such damage. In the event Lessor elects to give such notice
of Lessor's intention to cancel and terminate this Lease,  Lessee shall have the
right  within ten (10) days after the  receipt  of such  notice to give  written
notice  to Lessor of  Lessee's  intention  to  repair  such  damage at  Lessee's
expense,  without  reimbursement  from  Lessor,  in which event this Lease shall
continue in full force and effect, and Lessee shall proceed to make such repairs
as soon as reasonably possible.  If Lessee does not give such notice within such
10-day period this Lease shall be cancelled and terminated as of the date of the
occurrence of such damage.
          9.4 Total  Destruction.  If at any time  during the term of this Lease
there is damage, whether or not an Insured Loss, (including destruction required
by any authorized  public  authority),  which falls into the  classification  of
Premises Total  Destruction or Premises Building Total  Destruction,  this Lease
shall  automatically  terminate  as of the date of such total  destruction.  9.5
Damage Near End of Term.
              (a) If at any time  during the last six months of the term of this
Lease there is damage,  whether or not an Insured  Loss,  which falls within the
classification of Premises Partial Damage,  Lessor may at Lessor's option cancel
and  terminate  this Lease as of the date of occurrence of such damage by giving
written notice to Lessee of Lessor's  election to do so within 30 days after the
date of occurrence of such damage.
              (b) Notwithstanding paragraph 9.5(a), in the event that Lessee has
an option to extend or renew this Lease,  and the time within  which said option
may be exercised has not yet expired,  Lessee shall exercise such option,  if it
is to be  exercised  at all,  no later than 20 days after the  occurrence  of an
Insured Loss falling within the classification of Premises Partial Damage during
the last six months of the term of this  Lease.  If Lessee duly  exercises  such
option during said 20 day period, Lessor shall, at Lessor's expense, repair such
damage as soon as reasonably possible and this Lease shall


                                                             -9-








continue  in full force and  effect.  If Lessee  fails to  exercise  such option
during said 20 day period,  then Lessor may at  Lessor's  option  terminate  and
cancel this Lease as of the  expiration of said 20 day period by giving  written
notice  to  Lessee  of  Lessor's  election  to do so  within  10 days  after the
expiration of said 20 day period,  notwithstanding  any term or provision in the
grant of option to the contrary. 9.6 Abatement of Rent; Lessee's Remedies.
              (a) In the event of damage described in paragraphs 9.2 or 9.3, and
Lessor or Lessee repairs or restores the Premises  pursuant to the provisions of
this  Paragraph 9, the rent payable  hereunder  for the period during which such
damage,  repair or  restoration  continues  shall be abated in proportion to the
degree to which  Lessee's use of the Premises is impaired.  Except for abatement
of rent,  if any,  Lessee  shall  have no claim  against  Lessor  for any damage
suffered by reason of any such damage, destruction, repair or restoration.
              (b) If Lessor shall be obligated to repair or restore the Premises
under the  provisions of this  Paragraph 9 and shall not commence such repair or
restoration  within 90 days after such obligations  shall accrue,  Lessee may at
Lessee's  option cancel and terminate this Lease by giving Lessor written notice
of  Lessee's  election  to do so at any time prior to the  commencement  of such
repair or  restoration.  In such event this Lease shall terminate as of the date
of such notice.
          9.7  Termination - Advance  Payments.  Upon  termination of this Lease
pursuant to this Paragraph 9, an equitable  adjustment  shall be made concerning
advance rent and any advance payments made by Lessee to Lessor. Lessor shall, in
addition,  return to  Lessee so much of  Lessee's  security  deposit  as has not
theretofore been applied by Lessor.
          9.8 Waiver.  Lessor and Lessee  waive the  provisions  of any statutes
which relate to  termination  of leases when leased  property is  destroyed  and
agree that such event shall be governed by the terms of this Lease.

10. Real Property Taxes.
          10.1 Payment of Tax Increase.  Lessor shall pay the real property tax,
as defined in paragraph  10.3,  applicable to the Premises;  provided,  however,
that Lessee  shall pay, in addition to rent,  the amount,  if any, by which real
property taxes  applicable to the Premises  increase over the fiscal real estate
tax year 9~/95.  Such payment  shall be made by Lessee  within  thirty (30) days
after  receipt of Lessor's  written  statement  setting forth the amount of such
increase and the computation thereof. If the term of this Lease shall not expire
concurrently with the expiration of the tax fiscal year,  Lessee's liability for
increased  taxes for the last partial  lease year shall be prorated on an annual
basis.
     10.2 Additional Improvements. Notwithstanding paragraph 10.1 hereof, Lessee
shall pay to Lessor upon demand  therefor  the  entirety of any increase in real
property tax if assessed solely by reason of additional improvements placed upon
the Premises by Lessee or at Lessee's request. 10.3 Definition of "Real Property
Tax". As used herein, the
- -10-





term  "real  property  tax"  shall  include  any  form  of  real  estate  tax or
assessment,  general, special,  ordinary or extraordinary,  and any license fee,
commercial  rental  tax,  improvement  bond or bonds,  levy or tax  (other  than
inheritance,  personal  income or estate  taxes)  imposed on the Premises by any
authority having the direct or indirect power to tax,  including any city, state
or federal  government,  or any school,  agricultural,  sanitary,  fire, street,
drainage  or  other  improvement  district  thereof,  as  against  any  legal or
equitable  interest of Lessor in the  Premises or in the real  property of which
the  Premises  are a part,  as against  Lessor's  right to rent or other  income
therefrom,  and as against Lessor's  business of leasing the Premises.  The term
"real property tax" shall also include any tax, fee, levy,  assessment or charge
(i) in substitution of, partially or totally, any tax, fee, levy,  assessment or
charge  hereinabove  included  within the  definition of "real property tax," or
(ii) the nature of which was  hereinbefore  included  within the  definition  of
"real  property tax," or (iii) which is for a service or right not charged prior
to June 1, 1978, or, if previously  charged,  has been  increased  since June 1,
1978,  or (iv)  which is imposed as a result of a  transfer,  either  partial or
total, of Lessor's interest in the Premises or which is added to a tax or charge
hereinbefore  included  within the  definition of real property tax by reason of
such  transfer,  or (v) which is  imposed  by reason  of this  transaction,  any
modifications or changes hereto, or any transfers hereof.
          10.4 Joint  Assessment.  If the Premises are not separately  assessed,
Lessee's  liability shall be an equitable  proportion of the real property taxes
for all of the land and  improvements  included within the tax parcel  assessed,
such  proportion  to be  determined  by Lessor  from the  respective  valuations
assigned  in the  assessor's  work  sheets or such other  information  as may be
reasonably available.  Lessor's reasonable determination thereof, in good faith,
shall be conclusive. 10.5 Personal Property Taxes.
              (a)  Lessee  shall pay  prior to  delinquency  all taxes  assessed
against and levied upon trade  fixtures,  furnishings,  equipment  and all other
personal  property  of Lessee  contained  in the  Premises  or  elsewhere.  When
possible, Lessee shall cause said trade fixtures, furnishings, equipment and all
other  personal  property to be  assessed  and billed  separately  from the real
property of Lessor.
              (b) If any of Lessee's  said personal  property  shall be assessed
with Lessor's real property,  Lessee shall pay Lessor the taxes  attributable to
Lessee  within 10 days after  receipt of a written  statement  setting forth the
taxes applicable to Lessee's property.  11. Utilities.  Lessor shall pay for all
water  and trash  removal  supplied  to the  Premises,  together  with any taxes
thereon.  Lessee  shall pay,  in  addition  to the rent  described  herein,  its
proportional  share of the gas, heat, light, and power utilities supplied to the
premises,  together  with  any  taxes  thereon.  Terms  of  payment  shall be as
described in paragraph 10.1 above.

12. Assignment and Subletting.
12.1 Lessor's Consent Required.
Lessee shall not voluntarily

                                                             -11-







or by operation of law assign, transfer, mortgage, sublet, or otherwise transfer
or  encumber  all or any  part of  Lessee's  interest  in this  Lease  or in the
Premises,  without  Lessor's  prior  written  consent,  which  Lessor  shall not
unreasonably  withhold.  Lessor  shall  respond to Lessee's  request for consent
hereunder in a timely manner and any attempted assignment,  transfer,  mortgage,
encumbrance  or  subletting  without  such  consent  shall  be void,  and  shall
constitute a breach of this Lease.
          12.2 Lessee  Affiliate.  Notwithstanding  the  provisions of paragraph
12.1 hereof,  Lessee may assign or sublet the Premises,  or any portion thereof,
without Lessor's consent, to any corporation which controls, is controlled by or
is under common control with Lessee,  or to any  corporation  resulting from the
merger or consolidation  with Lessee,  or to any person or entity which acquires
all the  assets of  Lessee  as a going  concern  of the  business  that is being
conducted on the Premises,  provided that said assignee  assumes,  in full,  the
obligations of Lessee under this Lease.  Any such  assignment  shall not, in any
way,  affect or limit the liability of Lessee under the terms of this Lease even
if after such  assignment or subletting  the terms of this Lease are  materially
changed or altered without the consent of Lessee,  the consent of whom shall not
be necessary.
          12.3  No  Release  of  Lessee.  Regardless  of  Lessor's  consent,  no
subletting or assignment  shall release  Lessee of Lessee's  obligation or alter
the  primary  liability  of  Lessee  to pay the rent and to  perform  all  other
obligations  to be  performed by Lessee  hereunder.  The  acceptance  of rent by
Lessor from any other person shall not be deemed to be a waiver by Lessor of any
provision  hereof.  Consent to one assignment or subletting  shall not be deemed
consent to any subsequent  assignment or subletting.  In the event of default by
any assignee of Lessee or any successor of Lessee,  in the performance of any of
the terms  hereof,  Lessor may  proceed  directly  against  Lessee  without  the
necessity of exhausting  remedies  against said assignee.  Lessor may consent to
subsequent   assignments   or   subletting   of  this  Lease  or  amendments  or
modifications to this Lease with assignees of Lessee,  without notifying Lessee,
or any successor of Lessee,  and without  obtaining its or their consent thereto
and such action shall not relieve Lessee of liability under this Lease.
          12.4  Attorney's  Fees. In the event Lessee shall assign or sublet the
Premises or request the consent of Lessor to any  assignment or subletting or if
Lessee  shall  request the  consent of Lessor for any act Lessee  proposes to do
then Lessee shall pay Lessor's reasonable  attorneys fees incurred in connection
therewith, such attorneys fees not to exceed $350.00 for each such request.

13. Defaults; Remedies.
          13.1  Defaults.  The  occurrence  of any one or more of the  following
events shall constitute a material default and breach of this Lease by Lessee:
(a) The vacating or abandonment of the Premises By Lessee.
              (b) The failure by Lessee to make any payment of rent or any other
payment  required to be made by Lessee  hereunder,  as and when due,  where such
failure shall  continue for a period of three days after written  notice thereof
from Lessor to Lessee. In the event that


                                                             -12-







Lessor  serves  Lessee with a Notice to Pay Rent or Quit  pursuant to applicable
Unlawful Detainer statutes such Notice to Pay Rent or Quit shall also constitute
the notice required by this subparagraph.
              (c) The  failure  by  Lessee  to  observe  or  perform  any of the
covenants, conditions or provisions of this Lease to be observed or performed by
Lessee,  other than  described in paragraph (b) above,  where such failure shall
continue  for a period of 30 days after  written  notice  thereof from Lessor to
Lessee;  provided,  however, that if the nature of Lessee's default is such that
more than 30 days are reasonably required for its cure, then Lessee shall not be
deemed to be in default if Lessee  commenced such cure within said 30-day period
and thereafter diligently prosecutes such cure to completion.
              (d) (i)  The  making  by  Lessee  of any  general  arrangement  or
assignment  for the  benefit of  creditors;  (ii)  Lessee  becomes a "debtor" as
defined in 11 U.S.C.  Paragraph 101 or any successor statute thereto (unless, in
the case of a petition  filed against  Lessee,  the same is dismissed  within 60
days);  (iii) the  appointment  of a trustee or receiver to take  possession  of
substantially  all of  Lessee's  assets  located at the  Premises or of Lessee's
interest in this Lease,  where  possession  is not restored to Lessee  within 30
days;  or  (iv)  the  attachment,   execution  or  other  judicial   seizure  of
substantially  all of  Lessee's  assets  located at the  Premises or of Lessee's
interest in this Lease,  where such  seizure is not  discharged  within 30 days.
Provided,  however, in the event that any provision of this paragraph 13.1(d) is
contrary to any applicable law, such provision shall be of no force or effect.
              (e) The discovery by Lessor that any financial  statement given to
Lessor by Lessee, any assignee of Lessee, any subtenant of Lessee, any successor
in interest of Lessee or any guarantor of Lessee's obligation hereunder, and any
of them, was materially false.
          13.2 Remedies.  In the event of any such material default or breach by
Lessee, Lessor may at any time thereafter,  with or without notice or demand and
without  limiting Lessor in the exercise of any right or remedy which Lessor may
have by reason of such default or breach:
              (a) Terminate  Lessee's right to possession of the Premises by any
lawful  means,  in which  case this  Lease  shall  terminate  and  Lessee  shall
immediately surrender possession of the Premises to Lessor. In such event Lessor
shall be  entitled  to recover  from  Lessee all  damages  incurred by Lessor by
reason of Lessee's default including, but not limited to, the cost of recovering
possession  of  the  Premises;   expenses  of  reletting,   including  necessary
renovation and alteration of the Premises,  reasonable  attorney's fees, and any
real  estate  commission  actually  paid;  the worth at the time of award by the
court having jurisdiction thereof of the amount by which the unpaid rent for the
balance  of the term  after the time of such  award  exceeds  the amount of such
rental loss for the same period that Lessee proves could be reasonably  avoided;
that portion of the leasing  commission  paid by Lessor pursuant to Paragraph 15
applicable to the unexpired term of this Lease.
              (b) Maintain Lessee's right to possession in which case this Lease
shall  continue  in effect  whether  or not  Lessee  shall  have  abandoned  the
Premises. In such event Lessor shall be entitled to

                                                             -13-








enforce all of Lessor rights and remedies under this Lease,  including the right
to recover the rent as it becomes due hereunder.
              (c) Pursue any other remedy now or  hereafter  available to Lessor
under the laws or  judicial  decisions  of the state  wherein the  Premises  are
located.  Unpaid  installments of rent and other unpaid monetary  obligations of
Lessee  under the terms of this Lease shall bear  interest  from the date due at
the maximum rate then allowable by law.
          13.3 Default by Lessor.  Lessor shall not be in default  unless Lessor
fails to perform obligations required of Lessor within a reasonable time, but in
no event later than thirty  (30) days after  written  notice by Lessee to Lessor
and to the holder of any first mortgage or deed of trust the Premises whose name
and  address  shall  have  theretofore  been  furnished  to Lessee  in  writing,
specifying  wherein  Lessor  has failed to perform  such  obligation;  provided,
however, that if the nature of Lessor's obligation is such that more than thirty
(30) days are  required for  performance  then Lessor shall not be in default if
Lessor commences performance within such 30-day period and thereafter diligently
prosecutes the same to completion.
          13.4 Late  Charges.  Lessee hereby  acknowledges  that late payment by
Lessee to Lessor of rent and other sums due hereunder will cause Lessor to incur
costs  not  contemplated  by this  Lease,  the  exact  amount  of which  will be
extremely  difficult to ascertain.  Such costs include,  but are not limited to,
processing  and  accounting  charges,  and late charges  which may be imposed on
Lessor  by the  terms of any  mortgage  or trust  deed  covering  the  Premises.
Accordingly,  if any  installment of rent or any other sum due from Lessee shall
not be received by Lessor or Lessor's  designee  within ten (10) days after such
amount shall be due, then, without any requirement for notice to Lessee,  Lessee
shall  pay to  Lessor a late  charge  equal to 6% of such  overdue  amount.  The
parties  hereby  agree that such late charge  represents  a fair and  reasonable
estimate  of the costs  Lessor  will incur by reason of late  payment by Lessee.
Acceptance  of such late charge by Lessor shall in no event  constitute a waiver
of Lessee's default with respect to such overdue amount, nor prevent Lessor from
exercising any of the other rights and remedies granted hereunder.  In the event
that a late charge is payable hereunder, whether or not collected, for three (3)
consecutive  installments of rent, then rent shall automatically  become due and
payable quarterly in advance, rather than monthly,  notwithstanding  paragraph 4
or any other provision of this Lease to the contrary.
          13.5 Impounds.  In the event that a late charge is payable  hereunder,
whether  or not  collected,  for  three  (3)  installments  of rent or any other
monetary obligation of Lessee under the terms of this Lease, Lessee shall pay to
Lessor,  if Lessor shall so request,  in addition to any other payments required
under this Lease, a monthly advance installment, payable at the same time as the
monthly  rent,  as estimated  by Lessor,  for real  property  tax and  insurance
expenses on the  Premises  which are  payable by Lessee  under the terms of this
Lease.  Such fund  shall be  established  to  insure  payment  when due,  before
delinquency,  of any or all such real property taxes and insurance premiums.  If
the amounts paid to Lessor by Lessee under the  provisions of this paragraph are
insufficient to discharge the

                                                             -14-








obligations of Lessee to pay such real property taxes and insurance  premiums as
the same become due,  Lessee shall pay to Lessor,  upon  Lessor's  demand,  such
additional  sums  necessary to pay such  obligations.  All moneys paid to Lessor
under this paragraph may be  intermingled  with other moneys of Lessor and shall
not bear  interest.  In the event of a default in the  obligations  of Lessee to
perform under this Lease,  then any balance  remaining from funds paid to Lessor
under the provisions of this paragraph may, at the option of Lessor,  be applied
to the payment of any monetary default of Lessee in lieu of being applied to the
payment of real property tax and insurance premiums.

14.  Condemnation.  If the  Premises or any portion  thereof are taken under the
power of eminent domain,  or sold under the threat of the exercise of said power
(all of which are herein called  "condemnation"),  this Lease shall terminate as
to the part so taken as of the date  the  condemning  authority  takes  title or
possession,  whichever  first occurs.  If more than 10% of the floor area of the
building  on the  Premises,  or more than 25% of the land  area of the  Premises
which is not occupied by any building, is taken by condemnation,  Lessee may, at
Lessee's  option,  to be  exercised  in writing  only within ten (10) days after
Lessor shall have given Lessee  written notice of such taking (or in the absence
of such notice,  within ten (10) days after the condemning  authority shall have
taken possession)  terminate this Lease as of the date the condemning  authority
takes such  possession.  If Lessee does not  terminate  this Lease in accordance
with the  foregoing,  this Lease shall remain in full force and effect as to the
portion of the Premises remaining,  except that the rent shall be reduced in the
proportion  that the floor area of the  building  taken bears to the total floor
area of the building situated on the Premises.  No reduction of rent shall occur
if the only area taken is that which does not have a building  located  thereon.
Any award for the taking of all or any part of the  Premises  under the power of
eminent  domain or any payment  made under  threat of the exercise of such power
shall  be  the  property  of  Lessor,  whether  such  award  shall  be  made  as
compensation  for  diminution in value of the leasehold or for the taking of the
fee, or as severance damages;  provided,  however, that Lessee shall be entitled
to any award for loss of or damage to  Lessee's  trade  fixtures  and  removable
personal  property.  In the event that this Lease is not terminated by reason of
such  condemnation,  Lessor shall to the extent of severance damages received by
Lessor in connection with such  condemnation,  repair any damage to the Premises
caused by such condemnation except to the extent that Lessee has been reimbursed
therefor by the condemning  authority.  Lessee shall pay any amount in excess of
such severance damages required to complete such repair.

15. Broker's Fee.
              (a) Upon execution of this Lease by both parties, Lessor shall pay
to Sommers,  Oates and Associates,  licensed real estate broker(s), a fee as set
forth in a separate agreement between Lessor and said broker(s), or in the event
there is no separate  agreement between Lessor and said broker(s),  the sum of $
$2760.00, for brokerage

                                                             -15-








services rendered by said broker(s) to Lessor in this transaction.
              (b) Lessor further  agrees that if Lessee  exercises any Option as
defined in paragraph  39.1 of this Lease,  which is granted to Lessee under this
Lease, or any subsequently  granted option which is substantially  similar to an
Option granted to Lessee under this Lease,  or if Lessee  acquires any rights to
the Premises or other premises  described in this Lease which are  substantially
similar to what  Lessee  would have  acquired  had an Option  herein  granted to
Lessee been exercised,  or if Lessee remains in possession of the Premises after
the  expiration  of the term of this Lease  after  having  failed to exercise an
Option,  or if said broker(s) are the procuring cause of any other lease or sale
entered into between the parties  pertaining to the Premises and/or any adjacent
property in which Lessor has an interest,  then as to any of said  transactions,
Lessor shall pay said broker(s) a fee in accordance  with the schedule of Lessor
in effect at the time of  execution  of this Lease,  or in  accordance  with any
separate agreement between Lessor and said broker.
              (c) Lessor agrees to pay said fee not only on behalf of Lessor but
also on behalf of any person,  corporation,  association, or other entity having
an ownership  interest in said real property or any part thereof,  when such fee
is due  hereunder.  Any transferee of Lessor's  interest in this Lease,  whether
such  transfer is by agreement  or by operation of law,  shall be deemed to have
assumed  Lessor's  obligation  under this  Paragraph  15. Said broker shall be a
third party beneficiary of the provisions of this Paragraph 15.

16. Estoppel Certificate.
              (a)  Lessee  shall at any time upon not less  than ten (10)  days'
prior written notice from Lessor  execute,  acknowledge  and deliver to Lessor a
statement in writing (i)  certifying  that this Lease is unmodified  and in full
force and effect (or, if modified,  stating the nature of such  modification and
certifying that this Lease, as so modified, is in full force and effect) and the
date to which the rent and other  charges are paid in advance,  if any, and (ii)
acknowledging that there are not, to Lessee's knowledge, any uncured defaults on
the part of Lessor  hereunder,  or specifying  such defaults if any are claimed.
Any such statement may be conclusively relied upon by any prospective  purchaser
or encumbrancer of the Premises.
              (b) At Lessor's option, Lessee's failure to deliver such statement
within such time shall be a material breach of this Lease or shall be conclusive
upon  Lessee  (i)  that  this  Lease  is  in  full  force  and  effect,  without
modification  except as may be  represented  by  Lessor,  (ii) that there are no
uncured  defaults  in  Lessor's  performance,  and (iii)  that not more than one
month's  rent has been paid in  advance or such  failure  may be  considered  by
Lessor as a default by Lessee under this Lease.
              (c) If Lessor desires to finance, refinance, or sell the Premises,
or any part thereof,  Lessee hereby agrees to deliver to any lender or purchaser
designated  by Lessor such  financial  statements of Lessee as may be reasonably
required by such lender or  purchaser.  Such  statements  shall include the past
three years' financial statements of Lessee. All such financial statements shall
be received by Lessor and such lender or  purchaser in  confidence  and shall be
used

                                                             -16-







only for the purposes herein set forth.17. Lessor's Liability. The term "Lessor"
as used  herein  shall mean only the owner or owners at the time in  question of
the fee title or a lessee's  interest  in a ground  lease of the  Premises,  and
except as expressly  provided in  Paragraph  15, in the event of any transfer of
such title or  interest,  Lessor  herein  named  (and in case of any  subsequent
transfers  then the grantor)  shall be relieved  from and after the date of such
transfer of all  liability as respects  Lessor's  obligations  thereafter  to be
performed, provided that any funds in the hands of Lessor or the then grantor at
the time of such transfer,  in which Lessee has an interest,  shall be delivered
to the  grantee.  The  obligations  contained  in this Lease to be  performed by
Lessor  shall,  subject as  aforesaid,  be binding on  Lessor's  successors  and
assigns, only during their respective periods of ownership.

     18.  Severability.  The  invalidity  of any  provision  of  this  Lease  as
determined  by a court of  competent  jurisdiction,  shall in no way  affect the
validity of any other provision hereof.

19. Interest on Past-due Obligations.  Except as expressly herein provided,  any
amount due to Lessor not paid when due shall bear  interest at the maximum  rate
then  allowable  by law from the date due.  Payment of such  interest  shall not
excuse or cure any default by Lessee under this Lease,  provided,  however, that
interest  shall not be payable  on late  charges  incurred  by Lessee nor on any
amounts upon which late charges are paid by Lessee.

20. Time of Essence. Time is of the essence.

     21. Additional Rent. Any monetary obligations of Lessee to Lessor under the
terms of this Lease shall be deemed to be rent.

22.  Incorporation  of Prior  Agreements;  Amendments.  This Lease  contains all
agreements of the parties with respect to any matter mentioned  herein. No prior
agreement or  understanding  pertaining  to any such matter shall be  effective.
This Lease may be modified in writing only, signed by the parties in interest at
the time of the modification.  Except as otherwise stated in this Lease,  Lessee
hereby  acknowledges  that neither the real estate broker listed in Paragraph 15
hereof  nor any  cooperating  broker on this  transaction  nor the Lessor or any
employees  or  agents  of any of said  persons  has  made  any  oral or  written
warranties  or  representations  to Lessee  relative to the  condition or use by
Lessee  of said  Premises  and  Lessee  acknowledges  that  Lessee  assumes  all
responsibility  regarding the Occupational  Safety Health Act, the legal use and
adaptability of the Premises and the compliance thereof with all applicable laws
and  regulations  in effect  during the term of this Lease  except as  otherwise
specifically stated in this Lease.

     23.  Notices.  Any notice required or permitted to be given hereunder shall
be in writing and may be given by personal delivery or by certified mail. and if
given Personally or by mail, shall be deemed.

                                                             -17-







sufficiently  given if  addressed  to Lessee or to Lessor at the  address  noted
below the signature of the respective  parties, as the case may be. Either party
may by notice to the other  specify a  different  address  for  notice  purposes
except that upon Lessee's taking possession of the Premises,  the Premises shall
constitute Lessee's address for notice purposes.  A copy of all notices required
or permitted to be given to Lessor  hereunder shall be concurrently  transmitted
to such  party or  parties  at such  addresses  as Lessor  may from time to time
hereafter designate by notice to Lessee.

24.  Waivers.  No waiver by Lessor  or any  provision  hereof  shall be deemed a
waiver of any other  provision  hereof or of any subsequent  breach by Lessee of
the same or any other  provision.  Lessor's  consent to, or approval of any act,
shall not be deemed to render  unnecessary the obtaining of Lessor's  consent to
or approval of any subsequent act by Lessee. The acceptance of rent hereunder by
Lessor shall not be a waiver of any preceding  breach by Lessee of any provision
hereof, other than the failure of Lessee to pay the particular rent so accepted,
regardless  of  Lessor's  knowledge  of such  preceding  breach  at the  time of
acceptance of such rent.

     25.  Recording.  Either Lessor or Lessee shall,  upon request of the other,
execute,  acknowledge and deliver to the other a "short form" memorandum of this
Lease for recording purposes.

26. Holding Over. If Lessee, with Lessor's consent, remains in possession of the
Premises or any part  thereof  after the  expiration  of the term  hereof,  such
occupancy shall be a tenancy from month to month upon all the provisions of this
Lease  pertaining to the  obligations  of Lessee,  but all options and rights of
first  refusal,  if any,  granted  under the terms of this Lease shall be deemed
terminated and be of no further effect during said month to month tenancy.

     27. Cumulative  Remedies.  No remedy or election  hereunder shall be deemed
exclusive but shall, wherever possible, be cumulative with all other remedies at
law or in equity.

     28. Covenants and Conditions.  Each provision of this Lease  performable by
Lessee shall be deemed both a covenant and a condition.

29. Binding Effect;  Choice of Law. Subject to any provisions hereof restricting
assignment or  subletting  by Lessee and subject to the  provisions of Paragraph
17,  this  Lease  shall  bind  the  parties,  their  personal   representatives,
successors and assigns. This Lease shall be governed by the laws of the State of
California.

30. Subordination.
              (a) This Lease,  at Lessor's  option,  shall be subordinate to any
ground lease,  mortgage,  deed of trust, or any other  hypothecation or security
now or hereafter  placed upon the real property of which the Premises are a part
and to any and all advances  made on the security  thereof and to all  renewals,
modifications,    consolidations,    replacements   and   extensions    thereof.
Notwithstanding such
                                                             -18-


subordination,  Lessee's right to quiet  possession of the Premises shall not be
disturbed  if Lessee is not in default and so long as Lessee  shall pay the rent
and observe and perform all of the  provisions of this Lease,  unless this Lease
is otherwise  terminated  pursuant to its terms.  If any  mortgagee,  trustee or
ground  lessor shall elect to have this Lease prior to the lien of its mortgage,
deed of trust or ground lease,  and shall give written notice thereof to Lessee,
this Lease  shall be deemed  prior to such  mortgage,  deed of trust,  or ground
lease,  whether  this  Lease is dated  prior or  subsequent  to the date of said
mortgage, deed of trust or ground lease or the date of recording thereof.
              (b) Lessee agrees to execute any documents  required to effectuate
an attornment,  a  subordination  or to make this Lease prior to the lien of any
mortgage, deed of trust or ground lease, as the case may be. Lessee's failure to
execute such documents  within 10 days after written  demand shall  constitute a
material  default by Lessee  hereunder,  or, at Lessor's  option,  Lessor  shall
execute such documents on behalf of Lessee as Lessee's attorney-in-fact.  Lessee
does  hereby  make,  constitute  and  irrevocably  appoint  Lessor  as  Lessee's
attorney-in-fact  and in  Lessee's  name,  place  and  stead,  to  execute  such
documents in accordance with this paragraph 30(b).

31. Attorney's Fees. If either party or the broker named herein brings an action
to enforce the terms hereof or declare rights hereunder, the prevailing party in
any such  action,  on trial or  appeal,  shall  be  entitled  to his  reasonable
attorney's  fees to be paid by the  losing  party  as fixed  by the  court.  The
provisions  of this  paragraph  shall inure to the  benefit of the broker  named
herein who seeks to enforce a right hereunder.

32.  Lessor's  Access.  Lessor and Lessor's agents shall have the right to enter
the Premises at reasonable times for the purpose of inspecting the same, showing
the same to  prospective  purchasers,  lenders,  or  lessees,  and  making  such
alterations,  repairs,  improvements  or  additions  to the  Premises  or to the
building  of which they are a part as Lessor may deem  necessary  or  desirable.
Lessor may at any time place on or about the Premises  any  ordinary  "For Sale"
signs and  Lessor may at any time  during  the last 120 days of the term  hereof
place on or about the  Premises  any  ordinary  "For Lease"  signs,  all without
rebate of rent or liability to Lessee.

33.  Auctions.  Lessee shall not  conduct,  nor permit to be  conducted,  either
voluntarily or involuntarily, any auction upon the Premises without first having
obtained  Lessor's  prior  written  consent.  Notwithstanding  anything  to  the
contrary in this Lease,  Lessor  shall not be obligated to exercise any standard
of reasonableness in determining whether to grant such consent.

     34.  Signs.  Lessee  shall not place  any sign  upon the  Premises  without
Lessor's prior written consent except that Lessee shall have the right,  without
the prior  permission  of Lessor to place  ordinary and usual for rent or sublet
signs thereon.  Lessor shall allow Lessee one  identification  sign for Lessee's
business upon Lessee's door or

                                                             -19-

an  adjacent  wall or window  panel,  with the letters of said sign to be of the
same size and  general  type style as used for other  Lessees  in the  Premises.
Further,  Lessor  shall  provide a directory  listing for Lessee in the building
directory if said building directory exists.

35.  Merger.  The  voluntary or other  surrender  of this Lease by Lessee,  or a
mutual  cancellation  thereof,  or a  termination  by  Lessor,  shall not work a
merger,  and  shall,  at the  option of Lessor,  terminate  all or any  existing
subtenancies or may, at the option of Lessor, operate as an assignment to Lessor
of any or all of such subtenancies.

36. Consents. Except for paragraph 33 hereof, wherever in this Lease the consent
of one party is required to an act of the other party, such consent shall not be
unreasonably withheld.

37.  Guarantor.  In the event  that there is a  guarantor  of this  Lease,  said
guarantor shall have the same  obligations as Lessee under this Lease. 38. Quiet
Possession.  Upon Lessee  paying the rent for the  Premises  and  observing  and
performing all of the  covenants,  conditions and provisions on Lessee's part to
be observed and performed  hereunder,  Lessee shall have quiet possession of the
Premises  for the entire term hereof  subject to all of the  provisions  of this
Lease.  The individuals  executing this Lease on behalf of Lessor  represent and
warrant  to  Lessee  that they are  fully  authorized  and  legally  capable  of
executing this Lease on behalf of Lessor and that such execution is binding upon
all parties holding an ownership interest in the Premises.

39. Options.
          39.1 Definition.  As used in this paragraph the word "Options" has the
following  meaning:  (1) the right or option to extend the term of this Lease or
to renew  this  Lease;  (2) the  option or right of first  refusal  to lease the
Premises or the right of first offer to lease the Premises.
          39.2 Options Personal.  Each Option granted to Lessee in this Lease is
personal  to Lessee and may not be  exercised  or be  assigned,  voluntarily  or
involuntarily,  by or to any  person  or entity  other  than  Lessee,  provided,
however,  the Option may be exercised by or assigned to any Lessee  Affiliate as
defined in paragraph  12.2 of this Lease.  The Options  herein granted to Lessee
are not assignable separate and apart from this Lease.
          39.3  Multiple  Options.  In the event that  Lessee  has any  multiple
options to extend or renew this Lease a later option cannot be exercised  unless
the prior option to extend or renew this Lease has been so exercised.
39.4 Effect of Default on Options.
              (a)   Lessee   shall  have  no  right  to   exercise   an  Option,
notwithstanding any provision in the grant of Option to the contrary, (i) during
the time  commencing  from the date  Lessor  gives to Lessee a notice of default
pursuant to paragraph 13.1 (b) or 13.1(c)and continuing

                                                             -20-







until the default alleged in said notice of default is cured, or (ii) during the
period of time  commencing  on the day after a monetary  obligation to Lessor is
due from Lessee and unpaid  (without any necessity for notice thereof to Lessee)
continuing  until the obligation is paid. or (iii) at any time after an event or
default  described  in  paragraphs  13.1(a),  13.1(d),  or 13.1(e)  (without any
necessity  of Lessor to give notice of such  default to Lessee),  or (iv) in the
event that  Lessor has given to Lessee  three or more  notices of default  under
paragraph 13.1(b),  where a late charge becomes payable under paragraph 13.4 for
each of such  defaults,  or paragraph  13.1(c),  whether or not the defaults are
cured,  during  the 12 month  period  prior to the time that  Lessee  intends to
exercise the subject Option.
              (b) The period of time  within  which an Option  may be  exercised
shall not be extended or enlarged by reason of Lessee's inability to exercise an
Option because of the provisions of paragraph 39.4(a)
              (c) All rights of Lessee under the  provisions  of an Option shall
terminate and be of no further force or effect, notwithstanding Lessee's due and
timely  exercise of the Option,  if, after such  exercise and during the term of
this Lease,  (i) Lessee fails to pay to Lessor a monetary  obligation  of Lessee
for a period of 30 days after such obligation becomes due (without any necessity
of Lessor to give notice thereof to Lessee), or (ii) Lessee fails to commence to
cure a default specified in paragraph 13.1(c) within 30 days after the date that
Lessor gives notice to Lessee of such default and/or Lessee fails  thereafter to
diligently prosecute said cure to completion,  or (iii) Lessee commits a default
described in paragraph  13.1(a),  13.1(d) or 13.1(e)  (without any  necessity of
Lessor to give notice of such default to Lessee), or (iv) Lessor gives to Lessee
three or more notices of default under  paragraph  13.1 (b), where a late charge
becomes  payable under  paragraph 13.4 for each such default,  or paragraph 13.1
(c), whether or not the defaults are cured.
          39.5 Option To Renew.  Upon the  expiration of the initial lease term,
Lessee shall have the option to renew this lease for 0 additional period(s) of 0
months  each upon the same  terms and  conditions  herein  set forth at a rental
mutually agreeable to Lessor and Lessee, subject to the following limitations on
increases in the monthly rental.  The base monthly rental for each option period
shall not  exceed () percent of the  monthly  rental for the final  month of the
previous  lease term.  Said option  shall be  exercised by delivery of a written
election at least one hundred  twenty (120) days prior to the  expiration of the
then current lease term,  and shall  terminate if no agreement on rental for the
extended  term is  reached  within  sixty  (60)  days  after  such  election  is
delivered.

40.  Multiple  Tenant  Building.  In the event that the  Premises  are part of a
larger  building or group of buildings then Lessee agrees that it will abide by,
keep and observe all reasonable rules and regulations which Lessor may make from
time to time for the management,  safety,  care, and cleanliness of the building
and grounds,  the parking of vehicles and the preservation of good order therein
as well as for the  convenience of other  occupants and tenants of the building.
The  violations  of any such  rules and  regulations  shall be deemed a material
breach of this lease by Lessee.

                                                             -21-



41. Security  Measures.  Lessee hereby  acknowledges  that the rental payable to
Lessor  hereunder  does not include the cost of guard service or other  security
measures,  and that Lessor shall have no obligation  whatsoever to provide same.
Lessee assumes all  responsibility  for the protection of Lessee, its agents and
invitees from acts of third parties.

42. Easements.  Lessor reserves to itself the right, from time to time, to grant
such easements, rights and dedications that Lessor deems necessary or desirable,
and to cause the  recordation of Parcel Maps and  restrictions,  so long as such
easements,  rights,  dedications,  Maps  and  restrictions  do not  unreasonably
interfere  with the use of the Premises by Lessee.  Lessee shall sign any of the
aforementioned  documents  upon  request  of Lessor  and  failure to do so shall
constitute a material breach of this Lease.

43.  Performance  Under Protest.  If at any time a dispute shall arise as to any
amount or sum of money to be paid by one party to the other under the provisions
hereof, the party against whom the obligation to pay the money is asserted shall
have the right to make payment  "under  protest"  and such payment  shall not be
regarded as a voluntary  payment,  and there shall survive the right on the part
of said  party  to  institute  suit for  recovery  of such  sum.  If it shall be
adjudged  that  there was no legal  obligation  on the part of said party to pay
such sum or any part  thereof,  said party shall be entitled to recover such sum
or so much thereof as it was not legally required to pay under the provisions of
this Lease.

44.  Authority.  If  Lessee is a  corporation,  trust,  or  general  or  limited
partnership,  each  individual  executing  this  Lease on behalf of such  entity
represents and warrants that he or she is duly authorized to execute and deliver
this  Lease on behalf of said  entity.  If  Lessee  is a  corporation,  trust or
partnership,  Lessee  shall,  within  thirty (30) days after  execution  of this
Lease, deliver to Lessor evidence of such authority satisfactory to Lessor.

     45. Conflict. Any conflict between the printed provisions of this Lease and
the typewritten or handwritten provisions shall be controlled by the typewritten
or handwritten provisions.

     46.  Addendum.  Attached  hereto  is  an  addendum  or  addenda  containing
paragraphs A through A which constitutes a part of this Lease.

LESSOR AND LESSEE HAVE  CAREFULLY READ AND REVIEWED THIS LEASE AND EACH TERM AND
PROVISION  CONTAINED HEREIN AND, BY EXECUTION OF THIS LEASE, SHOW THEIR INFORMED
AND VOLUNTARY  CONSENT THERETO.  THE PARTIES HEREBY AGREE THAT, AT THE TIME THIS
LEASE IS  EXECUTED,  THE TERMS OF THIS  LEASE ARE  COMMERCIALLY  REASONABLE  AND
EFFECTUATE  THE INTENT AND  PURPOSE  OF LESSOR  AND LESSEE  WITH  RESPECT TO THE
PREMISES.



                                                             -22-








IF THIS LEASE HAS BEEN FILLED IN IT HAS BEEN  PREPARED  FOR  SUBMISSION  TO YOUR
ATTORNEY FOR HIS APPROVAL.  NO  REPRESENTATION  OR RECOMMENDATION IS MADE BY THE
AMERICAN  INDUSTRIAL REAL ESTATE ASSOCIATION OR BY THE REAL ESTATE BROKER OR ITS
AGENTS  OR  EMPLOYEES  AS  TO  THE  LEGAL  SUFFICIENCY,  LEGAL  EFFECT,  OR  TAX
CONSEQUENCES  OF THIS LEASE OR THE  TRANSACTION  RELATING  THERETO;  THE PARTIES
SHALL RELY SOLELY UPON THE ADVICE OF THEIR OWN LEGAL COUNSEL AS TO THE LEGAL AND
TAX CONSEQUENCES OF THIS LEASE.

The Parties hereto have executed this Lease at the Place on the dates  specified
immediately adjacent to their respective signatures.

Executed at Rohnert Park, California on_______________________

By: Western Business Park Associates
  100 Professional Center Drive, Suite 100
  Rohnert Park California 94928

  By_______________________________

Executed at ______________________

On________________________________

By________________________________


Address___________________________


















                                                             -23-







ADDENDUM A

RENTAL PAYMENT SCHEDULE SUITE 105-100 PROFESSIONAL CENTER DRIVE, ROHNERT PARK
PERIOD OF TIME         RENT DUE PER MONTH1st 6 months              $1883.70
2nd 6 months               2152.80 3rd 6 months               2421.90
4th 6 months               2691.00
5th 6 months               2960.10
6th 6 months               3229.20


DATE________________

IMMECOR INC. BY:



DATE________________

WESTERN BUSINESS PARK ASSOC. BY:






                                              LEASE MODIFICATION


The office lease dated December 13, 1994, by and between  WESTERN  BUSINESS PARK
ASSOCIATES,  Lessor,  and IMMECOR  CORPORATION,  Lessee,  is hereby  modified as
follows:

          1.  Effective  with  the rent due June 1,  1995,  the  leased  area is
increased by the area of those offices identified as Suites 105-A and 105-C, and
the base monthly rent shall be $2,173.15.

          2.  Effective  with the rent due  August 1, 1995,  the leased  area is
increased by the area of that office  identified  as Suite  105-D,  and the base
monthly rent shall be increased to  $2,738.35.  This base monthly rent  includes
the $.10 per square foot increase  (effective on each six month  anniversary) on
the original 2,691 square feet as provided for in the original lease.

All other terms and conditions of the original lease shall remain in force.

Dated _____________

Western Business Park Associates
By: ________________

 General Partner

Dated: ___________ IMMECOR CORPORATION

By:__________________









                                              LEASE MODIFICATION

The office lease dated December 13, 1994, by and between  WESTERN  BUSINESS PARK
ASSOCIATES,  Lessor,  and IMMECOR  CORPORATION,  Lessee,  is hereby  modified as
follows:

1. Effective with the rent due February 1, 1996, the leased area is increased by
the area of that office  identified  as Suite  105-B,  being 371 sq. ft. more or
less. The monthly rent for this additional area shall be calculated at $ .70 per
sq. ft.
          2. Also effective  with the rent due February,  the total monthly rent
due shall be  increased  to $ 3349.  This  includes  the $ .10 per  square  foot
increase  effective  on each  six  months  anniversary  as  provided  for in the
original lease.

All other terms and conditions of the original lease shall remain in force.

Dated: _________________

Western Business Park Associates

  By:________________
  General Partner


Dated:__________________


IMMECOR CORRORATION

By:___________________









                                              LEASE MODIFICATION

The office lease dated December 13, 1994, by and between  WESTERN  BUSINESS PARK
ASSOCIATES,  Lessor,  and IMMECOR  CORPORATION,  Lessee,  is hereby  modified as
follows:

          1.  Effective with the rent due August 1, 1996, the total monthly rent
due shall be increased by $351 from $ 3349 to $3,700.  This represents the $ .10
per square foot increase  effective on each six months  anniversary  as provided
for in the original lease.

All other terms and conditions of the original lease shall remain in force.

Dated: _________________

Western Business Park Associates

  By:________________
  General Partner


Dated:__________________


IMMECOR CORRORATION

By:___________________








                                  WESTERN BUSINESS PARK ASSOCIATES
                              100 Professional Center Drive, Suite 100
                                   Rohnert Park, California 94928
                                            707 585-3131

LEASE MODIFICATION

The office lease dated December 13, 1994, by and between  WESTERN  BUSINESS PARK
ASSOCIATES,  Lessor,  and IMMECOR  CORPORATION,  Lessee,  is hereby  modified as
follows:

1.   Effective  with the rent due April 1, 1997, the leased area is increased by
     the area of that of office identified as Suite 104, and the monthly rent is
     increased by $ 663.00.

All other terms and conditions of the original lease shall remain in force.

Dated: _________________

Western Business Park Associates

  By:________________
  General Partner


Dated:__________________


IMMECOR CORRORATION

By:___________________