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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             -----------------------

                                    FORM 10-Q


                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                             -----------------------

                  FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2002

                        COMMISSION FILE NUMBER 000-21930


                          BIOSOURCE INTERNATIONAL, INC.
             (Exact name of Registrant as specified in its charter)

           DELAWARE                                              77-0340829
(State or other jurisdiction of                             (I.R.S. Employer
 incorporation or organization)                              Identification No.)


 542 FLYNN ROAD, CAMARILLO, CALIFORNIA                             93012
(Address of principal executive offices)                        (Zip Code)


       Registrant's telephone number, including area code: (805) 987-0086


     Indicate  by check mark  whether the  Registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during the  preceding  12 months  (or for such  shorter  periods  that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.


                             YES /X/      NO /_/


     The number of shares of the  Registrant's  common  stock,  $.001 par value,
outstanding as of May 8, 2002 was 9,638,863.

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                 BIOSOURCE INTERNATIONAL, INC. AND SUBSIDIARIES
                                    FORM 10-Q
                                 MARCH 31, 2002

                                      INDEX


                                                                        PAGE NO.
                          PART I. FINANCIAL INFORMATION

ITEM 1.  FINANCIAL STATEMENTS

             Condensed Consolidated Balance Sheets as of
             March 31, 2002 (unaudited) and December 31, 2001               3

             Condensed Consolidated Statements of Operations
             for the three months ended March 31, 2002 and
             2001 (unaudited)                                               4

             Condensed Consolidated Statements of Cash Flows
             for the three months ended March 31, 2002 and
             2001 (unaudited)                                               5

             Notes to Condensed Consolidated Unaudited
             Financial Statements                                           6

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
         CONDITION AND RESULTS OF OPERATIONS                               10

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT
         MARKET RISK                                                       23


                           PART II. OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS                                                 23

ITEM 2.  CHANGES IN SECURITIES AND USE OF PROCEEDS                         24

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES                                   24

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS               24

ITEM 5.  OTHER INFORMATION                                                 24

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K                                  24

SIGNATURES                                                                 25


                                       2





                 BIOSOURCE INTERNATIONAL, INC. AND SUBSIDIARIES
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                             (Amounts in thousands)
                                   (Unaudited)


                                                        MARCH 31,   DECEMBER 31,
                                                          2002           2001
                                                        --------       --------

                     ASSETS
Current assets:
   Cash and cash equivalents .....................      $  6,340          9,471
   Accounts receivable, less allowance for
     doubtful accounts of $249 at March 31,
     2002 and $261 at December 31, 2001 ..........         6,543          6,184
   Inventories, net (note 3) .....................         7,313          7,184
   Prepaid expenses and other current assets .....           529            540
   Deferred income taxes .........................         1,584          1,584
                                                        --------       --------
              Total current assets ...............        22,309         24,963

Property and equipment, net (note 4) .............         5,645          5,408
Intangible assets net of accumulated amortization
   of $2,013 at March 31, 2002 and $2,101 at
   December 31, 2001 (note 5) ....................         6,565          6,912
Goodwill, net of accumulated amortization of
   $161 at March 31, 2002 and $1,276 at December
   31, 2001 (note 5) .............................           299          4,741
Other assets .....................................           560            491
Deferred tax assets ..............................         9,085          7,326
                                                        --------       --------
                                                        $ 44,463         49,841
                                                        ========       ========
      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Accounts payable ..............................      $  2,849          2,416
   Accrued expenses ..............................         2,365          2,707
   Deferred revenue ..............................           371            404
   Income tax payable ............................           540            436
                                                        --------       --------
              Total current liabilities ..........         6,125          5,963
Commitments and contingencies (note 9)

Stockholders' equity:
Common stock, $.001 par value. Authorized
   20,000,000 shares: issued 10,461,363 and
   outstanding 9,832,539 shares at March 31,
   2002; issued 10,449,817 shares and outstanding
   10,353,817 shares at December 31, 2001 ........            10             10
Additional paid-in capital .......................        45,723         48,761
Accumulated deficit ..............................        (4,829)        (2,330)
Accumulated other comprehensive loss .............        (2,566)        (2,563)
                                                        --------       --------
              Net stockholders' equity ...........        38,338         43,878
                                                        --------       --------
                                                        $ 44,463         49,841
                                                        ========       ========

The  accompanying  notes are an integral  part of these  condensed  consolidated
financial statements.


                                       3





                 BIOSOURCE INTERNATIONAL, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                   THREE MONTHS ENDED MARCH 31, 2002 AND 2001
                  (Amounts in thousands, except per share data)
                                   (Unaudited)


                                                          2002           2001
                                                        --------       --------

Net sales ........................................      $  9,781          8,657
Cost of sales ....................................         4,196          3,957
                                                        --------       --------
    Gross profit .................................         5,585          4,700

Operating expenses:
    Research and development .....................         1,293            954
    Sales and marketing ..........................         2,266          1,922
    General and administrative ...................         1,460          1,807
    Amortization of intangibles ..................           160            275
                                                        --------       --------
         Total operating expenses ................         5,179          4,958
                                                        --------       --------
Operating income (loss) ..........................           406           (258)

Interest income (expense), net ...................            40            137
Other income (expense), net ......................            30             49
                                                        --------       --------
Income (loss) before income taxes (benefit) ......           476            (72)
Income tax expense (benefit) .....................           105            (22)
                                                        --------       --------
         Net income (loss) before cumulative
           effect of accounting change ...........           371            (50)
Cumulative effect of accounting change (net
    of applicable income taxes of $1,759)
    (note 5) .....................................        (2,870)          --
                                                        --------       --------
Net loss .........................................      $ (2,499)           (50)
                                                        ========       ========

Net income (loss) per share before accounting
    change:
    Basic ........................................      $   0.04          (0.00)
                                                        ========       ========
    Diluted ......................................      $   0.03          (0.00)
                                                        ========       ========

Net income (loss) per share after accounting
    change:
    Basic ........................................      $  (0.25)          0.00
                                                        ========       ========
    Diluted ......................................      $  (0.23)          0.00
                                                        ========       ========

Shares used to compute net income (loss)
    per share:
    Basic ........................................        10,190         10,352
                                                        ========       ========
    Diluted ......................................        10,757         10,352
                                                        ========       ========

The  accompanying  notes are an integral  part of these  condensed  consolidated
financial statements.


                                       4





                 BIOSOURCE INTERNATIONAL, INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                   THREE MONTHS ENDED MARCH 31, 2002 AND 2001
                             (Amounts in thousands)
                                   (Unaudited)


                                                               2002       2001
                                                             -------    -------
Cash flows from operating activities:
    Net loss .............................................   $(2,499)       (50)
    Adjustments to reconcile net loss to net
      cash provided by (used in) operating
      activities:
         Depreciation and amortization ...................       496        551
         Stock compensation ..............................      --          339
    Changes in assets and liabilities, net of
      effects of acquisitions
         Accounts receivable .............................      (379)      (642)
         Inventories .....................................      (162)       233
         Prepaid expenses and other current assets .......        16        (67)
         Deferred taxes ..................................    (1,759)      --
         Other assets ....................................     4,560        365
         Accounts payable ................................       436     (1,008)
         Accrued expenses ................................      (306)      (475)
         Deferred revenue ................................       (33)       (51)
         Income taxes payable ............................       104          6
                                                             -------    -------
    Net cash provided from (used in) operating
      activities .........................................       474       (799)
                                                             -------    -------

Cash flows from investing activities:
    Purchase of property and equipment ...................      (623)      (213)
                                                             -------    -------
         Net cash flows from investing activities ........      (623)      (213)
                                                             -------    -------
Cash flows from financing activities:
    Proceeds from the exercise of options ................        40        201
    Purchase of treasury stock ...........................    (3,080)      --
                                                             -------    -------
         Net cash used in financing activities ...........    (3,040)       201
                                                             -------    -------

         Net decrease in cash and cash equivalents .......    (3,189)      (811)
Effect of exchange rates on cash and cash equivalents ....        58       (365)

Cash and cash equivalents at beginning of period .........     9,471     10,633
                                                             -------    -------

Cash and cash equivalents at end of period ...............   $ 6,340      9,457
                                                             =======    =======

Supplemental  disclosure of cash flow  information:
    Cash paid during the period for:
         Interest ........................................   $     1          1
                                                             =======    =======
         Income taxes ....................................   $  --         --
                                                             =======    =======

Supplemental disclosure of non-cash information:
         Income tax benefit from exercise of stock options   $    95       --
                                                             =======    =======


The  accompanying  notes are an integral  part of these  condensed  consolidated
financial statements.


                                       5





BIOSOURCE INTERNATIONAL, INC. AND SUBSIDIARIES
NOTES TO CONDENSED CONSOLIDATED UNAUDITED FINANCIAL STATEMENTS

1.   BASIS OF PRESENTATION

The  accompanying  condensed  consolidated  financial  statements  of  BioSource
International,  Inc.  (the  "Company")  are  unaudited  and have  been  prepared
pursuant to the rules and regulations of the Securities and Exchange  Commission
regarding interim financial reporting.  Accordingly,  they do not include all of
the  information  and  footnotes  required  by  generally  accepted   accounting
principles for complete  financial  statements and should be read in conjunction
with the  consolidated  financial  statements and notes thereto  included in our
Annual Report on Form 10-K,  for the fiscal year ended December 31, 2001. In the
opinion  of  management,   the  accompanying  unaudited  condensed  consolidated
financial  statements  include all  adjustments  that are  necessary  for a fair
presentation.  The results of  operations  for the three  months ended March 31,
2002,  are not  necessarily  indicative  of results to be expected  for the full
fiscal year.

2.   GENERAL

Our  company  develops,  manufactures,  markets  and  distributes  products  and
services that are widely used in biomedical research.  Our products and services
enable  scientists to better  understand the  biochemistry,  immunology and cell
biology of the human body, aging and certain diseases such as cancer,  arthritis
and other inflammatory diseases,  AIDS and certain other infectious diseases. We
have a wide  variety of  products,  including  immunoassay  and ELISA test kits;
immunological reagents, including bioactive proteins (cytokines,  growth factors
and  adhesion  molecules),   oligonucleotides,  and  monoclonal  and  polyclonal
antibodies. We also manufacture and market custom oligonucleotides, peptides and
antibodies  to the  specifications  of our  customers.  We use  recombinant  DNA
technology to produce cytokines and other proteins.

RECENTLY ISSUED ACCOUNTING STANDARDS

In  July  2001,   the  FASB  issued  SFAS  No.141,   "Accounting   For  Business
Combinations,"  and SFAS No. 142,  "Accounting For Goodwill and Other Intangible
Assets."  SFAS No. 141 requires  that the purchase  method of accounting be used
for all  business  combinations  initiated  after  June 30,  2001.  SFAS No. 142
requires that goodwill and  intangible  assets with  indefinite  useful lives no
longer be  amortized  to earnings,  but instead be reviewed  for  impairment  in
accordance with SFAS No. 142. The amortization of goodwill and intangible assets
with indefinite lives was  approximately  $160,000 and $275,000 for the quarters
ended  March 31,  2002 and 2001  respectively.  Effective  January 1, 2002,  the
Company's  goodwill and other intangible assets are accounted for under SFAS No.
141 "Business  Combinations"  and SFAS No. 142  "Goodwill  and Other  Intangible
Assets." In the quarter ended March 31, 2002, the Company  recognized a non-cash
impairment  charge,  net of applicable income taxes, of $2,870,000  representing
the  cumulative  effect of a change in accounting  principle  resulting from the
implementation  of FAS 142. This impairment  charge for goodwill  resulting from
the  adoption  of FAS 142 is  non-operational  in  nature  and is  shown  in the
accompanying  condensed  consolidated  statement of  operations  as a cumulative
effect of an accounting change net of the related tax impact.

In October 2001, the FASB issued SFAS No. 144, "Accounting for the Impairment or
Disposal  of  Long-Lived  Assets,"  which  addresses  financial  accounting  and
reporting for the  impairment or disposal of long-lived  assets.  While SFAS No.
144 supersedes SFAS No.121,  "Accounting for the Impairment of Long-Lived Assets
and for Long-Lived Assets to be Disposed Of," it retains many of the fundamental
provisions  of that  statement.  The  standard  is  effective  for fiscal  years
beginning after December 15, 2001. The Company expects that the adoption of SFAS
No. 144 will not have a material  impact on the  financial  position  or results
from operations.

3.   INVENTORIES (AMOUNTS IN THOUSANDS)

                                            MAR. 31, 2002         DEC. 31, 2001

     Raw materials                           $    2,344                 2,367
     Work in process                                357                   304
     Finished goods                               4,612                 4,513
                                             ----------            ----------
                                             $    7,313                 7,184
                                             ==========            ==========


                                       6





4.   PROPERTY AND EQUIPMENT (AMOUNTS IN THOUSANDS)

                                            MAR. 31, 2002         DEC. 31, 2001

     Machinery and equipment                 $    7,326                 6,919
     Office furniture and equipment               2,709                 2,604
     Leasehold improvements                         979                   907
                                             ----------            ----------
                                                 11,014                10,430
     Less accumulated depreciation and
       amortization                               5,369                 5,022
                                             ----------            ----------
                                             $    5,645                 5,408
                                             ==========            ==========

5.   GOODWILL AND INTANGIBLE ASSET - ADOPTION OF FINANCIAL  ACCOUNTING STATEMENT
     142

In  July  2001,   the  FASB  issued  SFAS  No.141,   "Accounting   For  Business
Combinations,"  and SFAS No. 142,  "Accounting For Goodwill and Other Intangible
Assets."  SFAS No. 141 requires  that the purchase  method of accounting be used
for all  business  combinations  initiated  after  June 30,  2001.  SFAS No. 142
requires that goodwill and  intangible  assets with  indefinite  useful lives no
longer be  amortized  to earnings,  but instead be reviewed  for  impairment  in
accordance with SFAS No. 142. The amortization of goodwill and intangible assets
with indefinite lives was  approximately  $160,000 and $275,000 for the quarters
ended  March 31, 2002 and 2001,  respectively.  Effective  January 1, 2002,  the
Company's  goodwill and other intangible assets are accounted for under SFAS No.
141 "Business  Combinations"  and SFAS No. 142  "Goodwill  and Other  Intangible
Assets." In the quarter ended March 31, 2002, the Company  recognized a non-cash
impairment  charge,  net of applicable income taxes, of $2,870,000  representing
the  cumulative  effect of a change in accounting  principle  resulting from the
implementation  of FAS 142. This impairment  charge for goodwill  resulting from
the  adoption  of FAS 142 is  non-operational  in  nature  and is  shown  in the
accompanying  condensed  consolidated  statement of  operations  as a cumulative
effect of an accounting change net of the related tax impact.

The pro forma effects of  implementation of FAS 142 to prior periods would be as
follows: (amounts in thousands)

                                                   QUARTER ENDED MARCH 31,
                                                 2002                 2001
                                             ----------           ----------

     REPORTED LOSS                           $   (2,499)                 (50)
     Add:
     Impairment charge                            2,870                   --
     Goodwill Amortization                           --                  115
                                             ----------           ----------
     Adjusted net Income                     $      371                   65
                                             ==========           ==========

     BASIC NET INCOME PER SHARE:
         Reported loss                       $    (0.25)                0.00
         Impairment charge                         0.29                 0.00
         Goodwill amortization                     0.00                 0.01
                                             ----------           ----------
         Adjusted net Income                 $     0.04                 0.01
                                             ==========           ==========

     DILUTED NET INCOME PER SHARE:
         Reported loss                       $    (0.23)                0.00
         Impairment charge                         0.26                 0.00
         Goodwill amortization                     0.00                 0.01
                                             ----------           ----------
         Adjusted net Income                 $     0.03                 0.01
                                             ==========           ==========


                                       7





EARNINGS PER SHARE

The  reconciliation  of basic to diluted  weighted  average shares is as follows
(amounts in thousands):

                                                   THREE MONTHS ENDED MARCH 31,
                                                     2002                2001
                                                  ---------           ---------
     Net income (loss) before cumulative
       effect of accounting change                $     371           $     (50)
                                                  =========           =========

     Weighted average shares used in basic
       computation                                   10,190              10,352

     Dilutive stock options and warrants                567                  --
                                                  ---------           ---------

     Weighted average shares used for diluted
       computation                                   10,757              10,352
                                                  =========           =========


Options to purchase  1,241,848  and  2,601,887  shares were not  included in the
computation  of diluted  net loss per share for the three  month  periods  ended
March  31,  2002  and  2001,   respectively   because   their  effect  would  be
anti-dilutive.

Warrants to purchase  1,287,000  shares at a weighted  average exercise price of
$7.77  per share  were  outstanding  as of March 31,  2002 and 2001 but were not
included in the computation of diluted net income (loss) per share for the three
months   ended  March  31,  2002  and  2001   because   their  effect  would  be
anti-dilutive.

7.   STOCKHOLDERS' EQUITY

Comprehensive loss is determined as follows (amounts in thousands):

                                                  THREE MONTHS ENDED MARCH 31,
                                                     2002                2001
                                                  ---------           ---------

     Net loss                                     $  (2,499)                (50)

     Foreign currency translation adjustments            (3)               (290)
                                                  ---------           ---------

     Total comprehensive loss                     $  (2,502)               (340)
                                                  =========           =========

8.   BUSINESS SEGMENTS

The  Company  is  engaged  in a single  industry,  the  licensing,  development,
manufacture, marketing and distribution of immunological reagents, test kits and
oligonucleotides  used  in  biomedical  research  and  human  diagnostics.   Our
customers are not concentrated in any specific  geographic  region and no single
customer accounts for a significant amount of our sales.

Management of the Company has determined  its reportable  segments are strategic
business  units  that offer both sales to  external  customers  from  geographic
company  facilities  and  sales to  external  customers  in  certain  geographic
regions.  Significant  reportable  business  segments are the United  States and
European  facilities,  and sales to external  customers are  summarized as those
located in the United States,  Europe,  Japan and other. We evaluate performance
for  the  "Sales-from"  segments  on  net  revenue  and  profit  and  loss  from
operations.  Our  reportable  segments are strategic  business  units that offer
geographical  product  availability.  They are managed  separtely  because  each
business  requires  different  marketing and distribution  strategies.  Business
information is summarized as follows:


                                       8





     SALES-FROM SEGMENTS (AMOUNTS IN THOUSANDS):   THREE MONTHS ENDED MARCH 31,
                                                     2002                2001
                                                   --------            --------
     Net sales to external customers from:
         United States:
              Domestic                             $  5,895               4,797
              Export                                  1,106               1,276
                                                   --------            --------
                  Total United States                 7,001               6,073
         Europe                                       2,780               2,584
                                                   --------            --------
                  Consolidated                     $  9,781               8,657
                                                   ========            ========
     Operating income (loss):
              United States                        $   (233)               (808)
              Europe                                    639                 550
                                                   --------            --------
                  Consolidated                     $    406                (258)
                                                   ========            ========

     SALES-TO SEGMENTS:
     Net sales to external customers in:
              United States                        $  5,895               4,797
              Europe                                  2,451               2,396
              Japan                                     932                 887
              Other                                     503                 577
                                                   --------            --------
                  Consolidated                     $  9,781               8,657
                                                   ========            ========

9.   COMMITMENTS AND CONTINGENCIES

On June 14, 2000, one of our former employees,  Jordan Fishman,  Ph.D.,  filed a
legal  action  against  us in  the  United  States  Central  District  Court  of
California alleging breach of Dr. Fishman's Employment Agreement and a number of
other causes of action. BioSource filed a counter claim against Dr. Fishman, and
a number of pre-trial  motions,  the result of which was that only the breach of
contract claim and BioSource's  counter claim remained for trial. On January 14,
2002,  shortly before the scheduled trial date,  plaintiff  agreed to settle the
case and the DiSorbo Lawsuit discussed below for $275,000.

Dr.  Fishman  also sued  Dennis  DiSorbo,  Ph.D.,  a Vice  President  of our QCB
division,  in the Superior  Court of Worcester,  Massachusetts,  for  wrongfully
interfering with his employment contract with BioSource (the "DiSorbo Lawsuit").
The DiSorbo  Lawsuit  was stayed  pending the  determination  of the  California
Lawsuit.  The  parties  agreed  to settle  the  DiSorbo  Lawsuit  as part of the
settlement of the California Lawsuit without additional consideration.

In June of 2000,  the former  shareholders  of QCB  commenced a AAA  arbitration
proceeding  against the Company  seeking the recovery of escrowed funds from the
purchase of QCB that were withheld  from the purchase  price paid by the Company
as security for claims the Company might discover after Closing. The Company has
counterclaimed against the former shareholders of QCB, including Dr. Fishman, in
the  arbitration  to recover  damages  management  believes  it has  suffered in
connection  with  inaccuracies  in, and/or breaches of the  representations  and
warranties  contained in the original Stock Purchase  Agreement for QCB executed
on December 9, 1998.  The Company seeks to recover  $1,347,000 of escrowed funds
for this claim. In addition,  the Company also brought a fraud claim against Dr.
Fishman  for the  intentional  misrepresentations  and/or  omissions  he made in
connection with the Stock Purchase  Agreement.  In its fraud claim,  the Company
seeks to recover the amount of its  overpayment  for the  purchase  of QCB,  the
amount of lost profits that BioSource  would  reasonably  have  anticipated  and
earned had QCB  possessed  the  characteristics  fraudulently  attributed to it,
punitive  damages,  and attorneys'  fees and costs.  The parties have selected a
panel of three  arbitrators  who will hear the  dispute.  The parties are in the
process of conducting discovery in connection with the arbitration. Discovery is
scheduled to conclude on July 15, 2002. The arbitration is scheduled to begin on
October 2, 2002.  The company has not recorded an accrual for any potential gain
realized  upon a  successful  recovery  of any or all of the  escrowed  funds or
recoverable  damages.  The  Company  is  expensing  all  legal  fees as they are
incurred.


                                       9





The Company is involved in various  other claims and lawsuits  incidental to its
business. In the opinion of management,  these claims and suits in the aggregate
will not  materially  affect the  financial  position,  results of operations or
liquidity of the Company.


ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

This  discussion  and analysis of financial  condition and results of operations
should be read in conjunction with the consolidated  financial  statements,  the
notes thereto and other information, including information set forth in our 10-K
for the fiscal year ended  December  31, 2001,  and all other recent  filings we
have made with the Securities and Exchange Commission.

This Form 10-Q contains forward-looking  statements,  which are made pursuant to
the safe-harbor  provisions of the Private  Securities  Litigation Reform Act of
1995.   Within   this  Form  10-Q,   words  such  as   "believes,"   "designed,"
"anticipates," and similar expressions are intended to identify  forward-looking
statements,  but are not the exclusive  means of  identifying  such  statements.
These  forward-looking  statements  involve a number of risks and uncertainties,
including  the timely  development  and market  acceptance  of our  products and
technologies  and other factors  described  throughout this Form 10-Q and in our
other filings with the  Securities and Exchange  Commission.  The actual results
that we achieve may differ from any forward-looking statements due to such risks
and  uncertainties.  We do not undertake any  obligation to revise or update any
forward-looking  statements in order to reflect events or circumstances that may
arise after the date of this report.

OVERVIEW

Our  company  develops,  manufactures,  markets  and  distributes  products  and
services that are widely used in biomedical research.  Our products and services
enable  scientists to better  understand the  biochemistry,  immunology and cell
biology of the human body, aging and certain diseases such as cancer,  arthritis
and other inflammatory diseases,  AIDS and certain other infectious diseases. We
have a wide  variety of  products,  including  immunoassay  and ELISA test kits;
immunological reagents, including bioactive proteins (cytokines,  growth factors
and  adhesion  molecules),   oligonucleotides,  and  monoclonal  and  polyclonal
antibodies. We also manufacture and market custom oligonucleotides, peptides and
antibodies  to the  specifications  of our  customers.  We use  recombinant  DNA
technology  to produce  cytokines and other  proteins.  We have  registered  our
analyte specific reagents with the FDA and have received a license to sell these
products  as Class I Medical  Devices.  We  market  these  products  to in vitro
diagnostic   manufacturers  and  clinical  reference   laboratories  as  "active
ingredients" in the tests they produce to identify various specific  diseases or
conditions.  In order to  market  these  products  as  medical  devices,  we are
required to be in compliance with the FDA's Current Good Manufacturing Practices
and Regulations.

CRITICAL ACCOUNTING POLICIES

General

Our discussion and analysis of our financial condition and results of operations
are based upon our consolidated  financial statements,  which have been prepared
in  accordance  with  accounting  principles  generally  accepted  in the United
States.  The  preparation  of these  financial  statements  requires  us to make
estimates and judgments that affect the reported amounts of assets, liabilities,
revenues  and  expenses,   and  related  disclosure  of  contingent  assets  and
liabilities.  On an on-going  basis,  we  evaluate  our  estimates.  We base our
estimates on historical  experience  and on various other  assumptions  that are
believed to be reasonable under the circumstances, the results of which form the
basis for making  judgments  about the carrying values of assets and liabilities
that are not readily apparent from other sources. Actual results may differ from
these  estimates  under  different  assumptions  or  conditions.   Specifically,
management must make estimates in the following areas:


     ALLOWANCE FOR DOUBTFUL ACCOUNTS.  The Company has $6,792,000 in gross trade
     accounts  receivable  and  $249,000 in allowance  for doubtful  accounts at
     March 31, 2002.  The Company has  procedures  in place to review the credit
     worthiness  of new  customers  and  also to  properly  review  orders  from
     existing customers to determine if a change in credit terms is warranted. A
     review of our allowance for doubtful accounts is


                                       10





     done timely and consistently  throughout the year. As of March 31, 2002, we
     believe our allowance for doubtful  accounts is fairly  stated.  We do have
     accounts  receivable  amounts from  certain  customers as of March 31, 2002
     that if their  financial  condition  changed  and a  significant  allowance
     needed to be created, could have a material adverse effect on the Company's
     financial results for 2002.


     INVENTORY  ADJUSTMENTS.  We review the  components  of our  inventory  on a
     regular  basis  for  excess,  obsolete  and  impaired  inventory  based  on
     estimated  future usage and sales. The Company reserves its entire antibody
     inventory  at 100% of its value  because the  ability to sell the  antibody
     inventory is questionable. As of March 31, 2002, the Company had $3,672,000
     of antibodies in its inventory and a reserve for these antibodies  totaling
     $3,672,000.  The Company  will  continue to monitor  its  antibody  reserve
     policy.  Additionally,  material inventory write-downs in our inventory can
     occur  if  competitive  conditions  or  new  product  introductions  by our
     customers or us vary from our current expectations.


     DEFERRED TAX ASSETS AND DEFERRED INCOME TAXES.  The Company has $10,669,000
     in  deferred  income  taxes and  deferred  tax  assets on its  consolidated
     balance  sheet as of March 31,  2002.  As of March 31,  2002,  no valuation
     allowance  has been set up to offset any of the  deferred  tax assets.  The
     ability to  realize  these  deferred  tax assets  depends  entirely  on the
     Company  generating  taxable  income in the  future.  The  Company has used
     historical  information as well as a projected financial outlook to project
     taxable  income  amounts.  The Company  believes it is more likely than not
     that they will be able to realize these benefits in the future.  A material
     change in our  expected  realization  of these  assets  would  occur if the
     ability to deduct tax loss  carryforwards  against future taxable income is
     altered. If our projections involving tax planning and operating strategies
     do not  materialize or if significant  changes in tax laws occur within the
     various tax  jurisdictions  in which we operate,  we would have to set up a
     valuation  allowance  against our deferred tax assets that could materially
     affect our tax expense and our financial results.

     We believe  the  following  critical  accounting  policies  affect our more
     significant judgments and estimates used in preparation of our consolidated
     financial statements.

     REVENUE  RECOGNITION.  Our revenue is  generated  from the sale of products
     primarily manufactured by us. We do have a small amount of products we sell
     on an outside  equipment  manufactured  ("OEM") basis. We recognize revenue
     from all of our product sales upon transfer of title to the customer, which
     occurs upon  shipment.  We  typically  ship to our  customers  FOB shipping
     point.  We do have  customers  who order and pay for certain  cell  culture
     products  and  request  that we store a portion  of the batch for them.  In
     these  instances,  we  record  all  payments  as  deferred  revenue  in the
     consolidated  balance  sheets and  recognize  revenue upon  shipment of the
     product to the customer.  The  Securities and Exchange  Commission's  Staff
     Accounting  Bulletin No. 101, "Revenue  Recognition,"  ("SAB 101") provides
     guidance on the application of generally accepted accounting  principles to
     selected  revenue   recognition   issues.   We  believe  that  our  revenue
     recognition  policy is consistent with this guidance and in accordance with
     generally accepted accounting principles.  We do not anticipate any changes
     to our revenue recognition and shipping policies in the future.

     LONG-LIVED  ASSETS.  In October,  2001 the Financial  Accounting  Standards
     Board ("FASB") issued Statement on Financial  Accounting Standards ("SFAS")
     No. 144,  "Accounting for the Impairment or Disposal of Long-Lived Assets,"
     which  addresses  financial  accounting and reporting for the impairment or
     disposal of long-lived  assets.  While SFAS No. 144 supersedes SFAS No.121,
     "Accounting  for the  Impairment  of Long-Lived  Assets and for  Long-Lived
     Assets to be Disposed Of," it retains many of the fundamental provisions of
     that statement.  The standard is effective for fiscal years beginning after
     December 15, 2001. It is our policy,  and in accordance  with SFAS No. 144,
     to account for long-lived assets, including intangibles, at amortized cost.
     As  part  of an  ongoing  review  of  the  valuation  and  amortization  of
     long-lived assets, management assesses the carrying value of such assets if
     facts and circumstances  suggest that they may be impaired.  If this review
     indicates that long-lived assets will not be recoverable,  as determined by
     a non-discounted cash flow analysis over the remaining amortization period,
     the carrying value of the Company's  long-lived  assets would be reduced to
     its estimated fair value based on discounted  cash flows.  As a result,  we
     have determined that our long-lived assets are not impaired as of March 31,
     2002 and 2001.


                                       11





     GOODWILL.  In July 2001,  the FASB  issued  SFAS  No.141,  "Accounting  For
     Business  Combinations,"  and SFAS No. 142,  "Accounting  For  Goodwill and
     Other Intangible Assets." SFAS No. 141 requires that the purchase method of
     accounting be used for all business  combinations  initiated after June 30,
     2001.  SFAS No. 142  requires  that  goodwill  and  intangible  assets with
     indefinite useful lives no longer be amortized to earnings,  but instead be
     reviewed for impairment in accordance  with SFAS No. 142. The  amortization
     of goodwill and intangible  assets with indefinite lives was  approximately
     $160,000  and  $275,000  for the  quarters  ended  March 31, 2002 and 2001,
     respectively.  Effective January 1, 2002, the Company's  goodwill and other
     intangible   assets  are   accounted  for  under  SFAS  No.  141  "Business
     Combinations"  and SFAS No. 142 "Goodwill and Other Intangible  Assets." In
     the  quarter  ended  March 31,  2002,  the  Company  recognized  a non-cash
     impairment   charge,   net  of  applicable   income  taxes,  of  $2,870,000
     representing  the  cumulative  effect of a change in  accounting  principle
     resulting from the  implementation  of FAS 142. This impairment  charge for
     goodwill  resulting  from the  adoption  of FAS 142 is  non-operational  in
     nature and is shown in the accompanying condensed consolidated statement of
     operations  as a  cumulative  effect  of an  accounting  change  net of the
     related tax impact.

RESULTS OF OPERATIONS FOR THE THREE MONTHS ENDED MARCH 31, 2002

Revenues:  Net sales for the quarter ended March 31, 2002 were $9.8 million,  an
increase of $1.1 million,  or 13%, (14% after  eliminating the $127,000 negative
impact of foreign  exchange)  compared to net sales for the quarter  ended March
31, 2001.  For the three months ended March 31, 2002,  the Company  achieved net
sales growth in North America of 21% as compared to the three months ended March
31, 2001.  European sales for the three months ended March 31, 2002 increased 2%
(8% in local currency),  as compared to the comparable prior year period.  Sales
in Japan and the rest of the world  increased  1%,  for the three  months  ended
March 31, 2002 as compared to the three months ended March 31, 2001.

Gross profit:  Gross profit margin for the three months ended March 31, 2002 was
57%, an increase  from 54% for the three months ended March 31, 2001.  The gross
profit  margin was higher for the quarter  ended March 31, 2002, in part because
of  increased  productivity  resulting  from  higher  demand of  certain  custom
products,  but  continued to be  negatively  impacted by increased  raw material
costs.

Research and development:  Research and development expense for the three months
ended March 31, 2002 and 2001 was  $1,293,000 and $954,000,  respectively.  As a
percentage of sales,  research and  development  expense was 13% and 11% for the
three  months  ended  March 31,  2002 and 2001  respectively.  The  increase  in
expenses  for the three  months  ended  March  31,  2002  when  compared  to the
comparable  prior  year  period  reflects  the  Company's  previously  announced
strategy of increasing R & D spending with the goal of producing more new, novel
and proprietary products.

Sales and  marketing:  Selling and marketing  expenses were $2.3 million for the
three months  ended March 31, 2002,  and $1.9 million for the three months ended
March 31, 2001, an increase of approximately $400,000. As a percentage of sales,
selling and  marketing  expenses  represented  23% and 22% for the three  months
ended March 31, 2002 and 2001,  respectively.  The increase in expenses from the
comparable  prior year  quarter is due to  approximately  $160,000 in  increased
expenses related to our sales catalog, $120,000 in payroll and related expenses,
including  sales  commissions,   and  $120,000  in  other  sales  and  marketing
expenditures.

General  and  administrative:  General  and  administrative  expenses  were $1.5
million for the three  months  ended March 31,  2002,  and $1.8  million for the
three months ended March 31,  2001, a decrease of $300,000.  As a percentage  of
sales, general and administrative expenses represented 15% and 21% for the three
months ended March 31, 2002 and 2001, respectively.  The decrease in expenses is
due to $495,000 of legal fees and a non-cash stock compensation  charge incurred
in the  quarter  ended  March 31,  2001,  that were not  incurred in the current
quarter, offset by an increase in ongoing general and administrative expenses of
$195,000 related to general office and personnel compensation expenses.

Amortization of intangible assets: Amortization of intangible assets for each of
the three  months  ended  March  31,  2002 and 2001  amounted  to  $160,000  and
$275,000,  respectively  and is related to the  amortization  of the  intangible
assets from the QCB and Biofluids acquisitions. The reduction in amortization in
the current quarter compared to


                                       12





the quarter  ended March 31, 2001, is related to the  implementation  of FAS 142
which eliminated the amortization of goodwill.

Interest income, net: Interest income for the three months ended March 31, 2002,
and March 31,  2001,  was  $40,000  and  $137,000  which was related to interest
income on cash invested in short-term  securities  during each of the respective
quarters.

Income  tax  expense  (benefit):  The  effective  income tax rate and income tax
amount for the three months ending March 31, 2002 was 22% or $105,000, and (31%)
or  ($22,000)  for the three  months  ended  March 31,  2001.  The  Company  has
benefited  from R & D and other tax  credits  which  when  applied  to the lower
income for the periods  presented  results in a lower effective tax rate for the
three  months  ended  March 31,  2002,  and an income tax  benefit for the three
months ended March 31, 2001.

Cumulative  effect of  accounting  change:  The  Company  recognized  a non-cash
charge,  net  of  applicable  income  taxes,  of  $2,870,000   representing  the
cumulative  effect  of a  change  in  accounting  principle  resulting  from the
implementation of FAS 142, Accounting for Goodwill and Other Intangible Assets.

LIQUIDITY AND CAPITAL RESOURCES:

Cash and cash  equivalents  as of March 31,  2002,  of  $6,340,000  decreased by
$3,131,000  from  $9,471,000 at December 31, 2001.  The decrease in cash was due
primarily  from a cash  outlay of $3.1  million  for the  repurchase  of 529,000
shares of the  Company's  common  stock  through  its stock  repurchase  program
initiated in October  2001.  Net cash  provided  from  operating  activities  of
$474,000 was offset by capital expenditures of $623,000.  Working capital, which
is the excess of current  assets over current  liabilities,  was  $16,184,000 at
March 31, 2002, as compared to $19,000,000 at December 31, 2001,  representing a
decrease of $2,816,000.

In the three months ended March 31, 2002, the Company  received $40,000 from the
issuance of common stock related to the exercise of stock options.

In  October of 2001,  the  Company  announced  that its Board of  Directors  had
approved a stock  repurchase  program.  The Board has  authorized the Company to
repurchase up to $5,000,000 of its common stock.  The repurchases are to be made
at the  discretion  of  management  and  can be  made  at any  time,  as  market
conditions  warrant.  The stock repurchase program will end June 30, 2003. As of
March 31, 2002, the Company had  repurchased  625,000 shares of Common Stock and
incurred a cash outlay totaling $3.7 million.

The Company has never paid  dividends  on common stock and has no plans to do so
in fiscal 2002. Our earnings will be retained for reinvestment in the business.

The  Company  expects to be able to meet its  future  cash and  working  capital
requirements for operations and capital additions  through  currently  available
funds  and  cash  generated  from  operations,  if any.  However,  we may  raise
additional  capital or secure debt financing from time to time to take advantage
of  favorable  conditions  in the  market or in  connection  with our  corporate
development activities.


                                  RISK FACTORS

You  should  carefully  consider  the  following  risk  factors  and  all  other
information  contained  in this report  before  purchasing  shares of our common
stock.  Investing in our common stock  involves a high degree of risk. If any of
the following events or outcomes actually occur, our business, operating results
and financial  condition would likely suffer. As a result,  the trading price of
our common  stock could  decline,  and you may lose all or part of the money you
paid to purchase our common stock.


                                       13





                          RISKS RELATED TO OUR BUSINESS

FAILURE TO MANAGE OUR GROWTH AND EXPANSION COULD IMPAIR OUR BUSINESS.

We  historically  have sought,  and will continue to seek, to increase our sales
and profitability  primarily through the acquisition or internal  development of
new product  lines,  additional  customers and new  businesses.  Our  historical
revenue growth is primarily  attributable  to our  acquisitions  and new product
development  and, to a lesser  extent,  to increased  revenues from our existing
products. We expect that future acquisitions,  if successfully consummated, will
create  increased  working  capital  requirements,  which will likely precede by
several  months any material  contribution  of an acquisition to our net income.
Our  ability  to  achieve  our  expansion  objectives  and to manage  our growth
effectively and profitably depends upon a variety of factors, including:

o    our ability to internally develop new products;

o    our ability to make profitable acquisitions;

o    integration of new facilities into existing operations;

o    hiring, training and retention of qualified personnel;

o    establishment of new  relationships or expansion of existing  relationships
     with customers and suppliers; and

o    availability of capital.

In addition,  the  implementation  of our growth strategy will place significant
strain on our administrative,  operational and financial resources and increased
demands on our financial systems and controls.  Our ability to manage our growth
successfully  will require us to continue to improve and expand these resources,
systems and controls.  If our management is unable to manage growth effectively,
our operating  results could be adversely  affected.  Moreover,  there can be no
assurance that our historic rate of growth will continue,  that we will continue
to successfully expand or that growth or expansion will result in profitability.

WE CANNOT GUARANTEE THAT OUR FUTURE ACQUISITIONS WILL BE SUCCESSFUL.

We compete for acquisition and expansion opportunities with companies which have
significantly  greater financial and management  resources than us. There can be
no assurance  that  suitable  acquisition  or investment  opportunities  will be
identified,  that any of these  transactions  can be  consummated,  or that,  if
acquired,  these new  businesses can be integrated  successfully  and profitably
into our  operations.  These  acquisitions  and  investments  may also require a
significant  allocation of resources,  which will reduce our ability to focus on
the other portions of our business,  including many of the factors listed in the
prior risk factor.

REDUCTION  OR DELAYS IN  RESEARCH  AND  DEVELOPMENT  BUDGETS  AND IN  GOVERNMENT
FUNDING MAY NEGATIVELY IMPACT OUR SALES.

Our customers include researchers at pharmaceutical and biotechnology companies,
academic institutions and government and private  laboratories.  Fluctuations in
the  research  and   development   budgets  of  these   researchers   and  their
organizations  could have a  significant  effect on the demand for our products.
Research and  development  budgets  fluctuate  due to numerous  factors that are
outside our control and are difficult to predict, including changes in available
resources,   spending  priorities  and  institutional  budgetary  policies.  Our
business could be seriously damaged by any significant decrease in life sciences
research  and  development  expenditures  by  pharmaceutical  and  biotechnology
companies, academic institutions or government and private laboratories.

A  significant  portion  of our  sales  has been to  researchers,  universities,
government  laboratories and private foundations whose funding is dependent upon
grants from government  agencies such as the U.S. National  Institutes of Health
and similar domestic and international agencies.  Although the level of research
funding has increased  during the past several years, we cannot assure that this
trend will continue.  Government  funding of research and development is subject
to the political  process,  which is  inherently  fluid and  unpredictable.  Our
revenues may be


                                       14





adversely affected if our customers delay purchases as a result of uncertainties
surrounding  the  approval of  government  budget  proposals.  Also,  government
proposals to reduce or eliminate  budgetary  deficits  have  sometimes  included
reduced  allocations to the NIH and other government agencies that fund research
and  development  activities.  A reduction in government  funding for the NIH or
other government research agencies could seriously damage our business.

Many of our customers  receive funds from approved grants at particular times of
the year,  as determined  by the federal  government.  Grants have, in the past,
been frozen for extended periods or have otherwise become unavailable to various
institutions  without advance  notice.  The timing of the receipt of grant funds
affects the timing of purchase  decisions by our customers and, as a result, can
cause fluctuations in our sales and operating results.

WE RELY ON RAW MATERIALS AND SPECIALIZED EQUIPMENT FOR OUR MANUFACTURING,  WHICH
WE MAY NOT ALWAYS BE ABLE TO OBTAIN ON FAVORABLE TERMS.

Our manufacturing  process relies on the continued  availability of high-quality
raw  materials  and  specialized  equipment.  It is  possible  that a change  in
vendors,  or in the quality of the raw  materials  supplied to us, could have an
adverse impact on our manufacturing process and, ultimately,  on the sale of our
finished  products.  We have from time to time  experienced  a disruption in the
quality or availability of key raw materials,  which has created minor delays in
our ability to fill orders for specific test kits. This could occur again in the
future,  resulting in significant delays, and could have a detrimental impact on
the sale of our products and our results of operations.  In addition, we rely on
highly  specialized  manufacturing  equipment  that if damaged or disabled could
adversely   affect  our  ability  to  manufacture  our  products  and  therefore
negatively impact our business.

OUR ABILITY TO RAISE THE CAPITAL NECESSARY TO EXPAND OUR BUSINESS IS UNCERTAIN.

In the future,  in order to expand our business through internal  development or
acquisitions,  we may need to raise substantial  additional funds through equity
or  debt  financings,  research  and  development  financings  or  collaborative
relationships.  However,  this  additional  funding may not be available  or, if
available,  it  may  not be  available  on  economically  reasonable  terms.  In
addition,  any additional funding may result in significant dilution to existing
stockholders. If adequate funds are not available, we may be required to curtail
our operations or obtain funds through  collaborative  partners that may require
us to release material rights to our products.

OUR RESEARCH AND DEVELOPMENT EFFORTS FOR NEW PRODUCTS MAY BE UNSUCCESSFUL.

We incur significant  research and development  expenses to develop new products
and  technologies.  There  can be no  assurance  that any of these  products  or
technologies  will be  successfully  developed  or that  if  developed,  will be
commercially   successful.   In  the  event   that  we  are  unable  to  develop
commercialized  products  from our  research and  development  efforts or we are
unable or  unwilling  to  allocate  amounts  beyond  our  currently  anticipated
research and  development  investment,  we could lose our entire  investment  in
these new  products  and  technologies.  Any failure to  translate  research and
development expenditures into successful new product introductions could have an
adverse effect on our business.

FAILURE TO LICENSE NEW TECHNOLOGIES COULD IMPAIR OUR NEW PRODUCT DEVELOPMENT.

Our business model of providing products to researchers  working on a variety of
genetic projects requires us to develop a wide spectrum of products. To generate
broad product lines it is advantageous to sometimes  license  technologies  from
others rather than depending  exclusively on our own employees.  As a result, we
believe our ability to license new  technologies  from third parties is and will
continue to be important to our ability to offer new products.

In  addition,  from time to time we are notified or become aware of patents held
by third parties that are related to  technologies we are selling or may sell in
the future.  After a review of these patents,  we may decide to obtain a license
for these  technologies  from these third parties or  discontinue  the products.
There  can be no  assurance  that we will be able to  continue  to  successfully
identify new technologies  developed by others.  Even if we are able to identify
new  technologies  of  interest,  we may not be able to  negotiate  a license on
favorable terms, or at all. If we


                                       15





lose the  rights to  patented  technology,  we may need to  discontinue  selling
certain  products  or  redesign  our  products,  and we may  lose a  competitive
advantage.  Potential competitors could in-license  technologies that we fail to
license  and  potentially  erode our  market  share for  certain  products.  Our
licenses  typically  subject  us  to  various  commercialization,  sublicensing,
minimum  payment,  and  other  obligations.  If we fail  to  comply  with  these
requirements,  we could lose  important  rights  under a license.  In  addition,
certain  rights  granted  under the license could be lost for reasons out of our
control.  For example, the licensor could lose patent protection for a number of
reasons,  including  invalidity of the licensed patent. We do not always receive
significant  indemnification  from a  licensor  against  third  party  claims of
intellectual property infringement.

We are  currently in the process of  negotiating  several of these  licenses and
expect that we will also negotiate these types of licenses in the future.  There
can be no  assurances  that  we will be able  to  negotiate  these  licenses  on
favorable terms, or at all.

OUR FUTURE SUCCESS  DEPENDS ON THE TIMELY  INTRODUCTION  OF NEW PRODUCTS AND THE
ACCEPTANCE OF THESE NEW PRODUCTS IN THE MARKETPLACE.

Our ability to gain access to technologies  needed for new products and services
also  depends  in  part  on  our  ability  to  convince  licensors  that  we can
successfully  commercialize  their inventions.  We cannot assure that we will be
able to continue to identify new  technologies  developed by others.  Even if we
are  able  to  identify  new  technologies  of  interest,  we may not be able to
negotiate a license on favorable terms, or at all.

IF WE FAIL TO INTRODUCE  NEW  PRODUCTS,  OR OUR NEW PRODUCTS ARE NOT ACCEPTED BY
POTENTIAL CUSTOMERS, WE MAY LOSE MARKET SHARE.

Rapid  technological  change and frequent new product  introductions are typical
for the markets we serve.  Our future success will depend in part on continuous,
timely development and introduction of new products that address evolving market
requirements.   We  believe  successful  new  product  introductions  provide  a
significant  competitive  advantage because customers make an investment of time
in  selecting  and  learning to use a new  product,  and then are  reluctant  to
switch. To the extent we fail to introduce new and innovative  products,  we may
lose market share to our  competitors,  which will be difficult or impossible to
regain.  Any inability,  for  technological  or other reasons,  to  successfully
develop and  introduce  new products  could reduce our growth rate or damage our
business.

In the past we have  experienced,  and are likely to  experience  in the future,
delays in the development and introduction of products. We cannot assure that we
will keep pace with the rapid rate of change in life sciences research,  or that
our new products will  adequately  meet the  requirements  of the marketplace or
achieve market  acceptance.  Some of the factors  affecting market acceptance of
new products include:

o    availability, quality and price relative to competitive products;

o    the timing of introduction of the product relative to competitive products;

o    customers' opinion of the products utility;

o    ease of use;

o    consistency with prior practices;

o    scientists' opinion of the product's usefulness;

o    citation of the product in published research; and

o    general trends in life sciences research.

The  expenses  or  losses  associated  with  unsuccessful   product  development
activities  or lack of market  acceptance of our new products  could  materially
adversely affect our business, operating results and financial condition.


                                       16





The  development,  introduction  and  marketing  of  innovative  products in our
rapidly  evolving  markets will require  significant  sustained  investment.  We
cannot assure their cash from  operations or other sources will be sufficient to
meet these ongoing requirements.

FAILURE TO ATTRACT AND RETAIN  QUALIFIED  SCIENTIFIC OR PRODUCTION  PERSONNEL OR
LOSS OF KEY MANAGEMENT OR KEY PERSONNEL COULD HURT OUR BUSINESS.

Recruiting  and  retaining  qualified  scientific  and  production  personnel to
perform research and development  work and product  manufacturing is critical to
our success.  Because the industry in which we compete is very  competitive,  we
face significant  challenges  attracting and retaining this qualified  personnel
base.  Although  we believe we have been and will be able to attract  and retain
these  personnel,  there can be no assurance that we will be able to continue to
successfully  attract qualified personnel.  In addition,  our anticipated growth
and expansion into areas and activities requiring additional expertise,  such as
clinical testing,  government approvals,  production and marketing, will require
the addition of new  management  personnel  and the  development  of  additional
expertise by existing  management  personnel.  The failure to attract and retain
these personnel or,  alternatively,  to develop this expertise  internally would
adversely  affect  our  business.  We  generally  do not enter  into  employment
agreements  requiring  these  employees  to continue in our  employment  for any
period of time.

Our success also will continue to depend to a significant  extent on the members
of our management team and, in particular,  on our Chief  Executive  Officer and
President,  Leonard M.  Hendrickson.  We do not maintain any "key man" insurance
policies  regarding any of these  individuals.  We may not be able to retain the
services of our  executive  officers  and key  personnel  or attract  additional
qualified  members to  management  in the  future.  The loss of  services of Mr.
Hendrickson,  or of any of our other key  management or employees,  could have a
material adverse effect upon our business.

MANY OF OUR  CUSTOMERS  ARE  OBTAINING  OUR  PRODUCTS  THROUGH NEW  DISTRIBUTION
CHANNELS AND METHODS THAT MAY  ADVERSELY  IMPACT OUR RESULTS OF  OPERATIONS  AND
FINANCIAL CONDITION.

A number of our customers  have developed  purchasing  initiatives to reduce the
number of vendors they purchase  from in order to lower their supply  costs.  In
some cases, these customers have established  agreements with large distributors
which  include  discounts  and the  distributors'  direct  involvement  with the
purchasing process.  For similar reasons,  many larger customers,  including the
federal  government,  have  special  pricing  arrangements,   including  blanket
purchase  agreements.  These  agreements may limit our pricing  flexibility with
respect to our products,  which could adversely  impact our business,  financial
condition and results of operations. In addition, although we accept and process
some orders  through our Internet  website,  we also  implement  sales through a
third  party  Internet  vendor.   Internet  sales  through  third  parties  will
negatively  impact our gross margins because we pay commission on these Internet
sales. On the other hand, if we do not enter into  arrangements with third-party
e-commerce  providers,  we may lose  customers  who prefer to purchase  products
using these Web sites. Our business may be harmed as a result of these Web sites
or other sales methods which may be developed in the future.

WE RELY ON INTERNATIONAL SALES, WHICH ARE SUBJECT TO ADDITIONAL RISKS.

International  sales accounted for  approximately 40% and 45% of our revenues in
the first three months of 2002 and 2001,  respectively.  International sales can
be subject to many inherent  risks that are  difficult or  impossible  for us to
predict or control, including:

o    unexpected changes in regulatory requirements and tariffs;

o    difficulties  and costs  associated  with in staffing and managing  foreign
     operations, including foreign distributor relationships;

o    longer accounts receivable collection cycles in certain foreign countries;

o    adverse economic or political changes;

o    unexpected changes in regulatory requirements;


                                       17





o    more limited protection for intellectual property in some countries;

o    changes in our international distribution network and direct sales force;

o    potential  trade  restrictions,  exchange  controls  and  import and export
     licensing requirements;

o    problems in collecting accounts receivable; and

o    potentially adverse tax consequences of overlapping tax structure.

We intend to continue to generate  revenues  from sales outside North America in
the future.  Future  distribution of our products outside North America also may
be subject to greater governmental regulation. These regulations,  which include
requirements for approvals or clearance to market,  additional time required for
regulatory  review and sanctions  imposed for  violations,  as well as the other
risks indicated in the bullets listed above, vary by country. We may not be able
to obtain  regulatory  approvals in the countries in which we currently sell our
products  or in  countries  where we may sell our  products  in the  future.  In
addition,  we may be required to incur significant costs in obtaining  necessary
regulatory  approvals.  Failure to obtain necessary  regulatory approvals or any
other failure to comply with regulatory  requirements could result in a material
reduction in our revenues and earnings.

We also  depend  on  third-party  distributors  for a  material  portion  of our
international sales. If we lose or suffer any significant  reduction in sales to
any material distributor, our business could be materially adversely affected.

In addition,  approximately 26% of our sales in the three months ended March 31,
2002, were made in foreign currencies, primarily the Euro. A significant portion
of the foreign currencies in which we conduct our business is currently,  or may
in the future be,  denominated in Euros.  We are not certain about the effect of
the Euro on our business,  financial condition or results of operations.  In the
past, gains and losses on the collection of our accounts receivable arising from
international  operations  have  contributed  to  negative  fluctuations  in our
results of operations. In general,  increases in the exchange rate of the United
States dollar to foreign currencies cause our products to become relatively more
expensive to customers  in those  countries,  leading to a reduction in sales or
profitability  in some cases. We  historically  have not, and currently are not,
using hedging transactions or other means to reduce our exposure to fluctuations
in the value of the United States  dollar as compared to the foreign  currencies
in which many of our sales are made.

OUR OPERATING RESULTS MAY FLUCTUATE.

Our operating results may vary significantly quarter to quarter and from year to
year as a result of a variety of factors. These factors include:

o    level of demand for our products;

o    changes in our customer and product mix;

o    timing of acquisitions and investments in infrastructure;

o    competitive conditions;

o    timing and extent of intellectual property litigation;

o    exchange rate fluctuations; and

o    general economic conditions.

We  believe  that  quarterly  comparisons  of  our  financial  results  may  not
necessarily  be  meaningful  and should not be relied upon as an  indication  of
future  performance.  Additionally,  if our  operating  results  in one or  more
quarters do


                                       18





not meet the  expectations  of  security  analysts  or others,  the price of our
common stock could be materially adversely affected.

Our  continued  investment  in product  development  and sales and marketing are
significantly ongoing expenses. If revenue in a particular period falls short of
expectations,  we may not be able to reduce  significantly  our expenditures for
that period,  which would materially  adversely affect the operating results for
that period.

WE MAY BE UNABLE TO PROTECT OUR TRADEMARKS, TRADE SECRETS AND OTHER INTELLECTUAL
PROPERTY RIGHTS THAT ARE IMPORTANT TO OUR BUSINESS.

We regard our  trademarks,  trade secrets and other  intellectual  property as a
component of our success.  We rely on trademark law and trade secret  protection
and  confidentiality  and/or  license  agreements  with  employees,   customers,
partners and others to protect our intellectual  property.  Effective  trademark
and trade secret  protection  may not be available in every country in which our
products are  available.  We cannot be certain that we have taken adequate steps
to protect our intellectual property, especially in countries where the laws may
not  protect  our  rights as fully as in the United  States.  In  addition,  our
third-party  confidentiality  agreements can be breached and, if they are, there
may not be an  adequate  remedy  available  to us. If our trade  secrets  become
known, we may lose our competitive position.

INTELLECTUAL PROPERTY OR OTHER LITIGATION COULD HARM OUR BUSINESS.

Litigation regarding patents and other intellectual property rights is extensive
in the biotechnology  industry. We are aware that patents have been applied for,
and in some  cases  issued to others,  claiming  technologies  that are  closely
related to ours. As a result,  and in part due to the  ambiguities  and evolving
nature  of  intellectual  property  law,  we  periodically  receive  notices  of
potential  infringement  of  patents  held by others.  Although  to date we have
successfully  resolved these types of claims, we may not be able to do so in the
future.

In the event of an intellectual  property dispute, we may be forced to litigate.
This  litigation  could  involve  proceedings  declared  by the U.S.  Patent and
Trademark Office or the International  Trade Commission,  as well as proceedings
brought directly by affected third parties. Intellectual property litigation can
be extremely expensive,  and these expenses,  as well as the consequences should
we not prevail, could seriously harm our business.

If a third party claimed an intellectual property right to technology we use, we
might need to  discontinue  an  important  product or  product  line,  alter our
products  and  processes,  pay  license  fees or  cease  our  affected  business
activities.  Although  we might under  these  circumstances  attempt to obtain a
license to this intellectual  property, we may not be able to do so on favorable
terms, or at all.

In addition to intellectual property litigation,  other substantial,  complex or
extended  litigation could result in large expenditures by us and distraction of
our management. For example, lawsuits by employees, stockholders,  collaborators
or  distributors  could be very costly and  substantially  disrupt our business.
Disputes from time to time with companies or individuals are not uncommon in our
industry,  and we cannot  assure you that we will always be able to resolve them
out of court.

ACCIDENTS RELATED TO HAZARDOUS MATERIALS COULD ADVERSELY AFFECT OUR BUSINESS.

Portions  of  our  operations  require  the  controlled  use  of  hazardous  and
radioactive materials. Although we believe our safety procedures comply with the
standards prescribed by federal, state, local and foreign regulations,  the risk
of  accidental  contamination  of property or injury to  individuals  from these
materials cannot be completely eliminated. In the event of an accident, we could
be liable for any damages that result, which could seriously damage our business
and results of operations.

OUR SALES ARE SUBJECT TO  SEASONALITY,  WHICH MEANS THAT WE HAVE LESS REVENUE IN
SOME MONTHS.

We  experience  a slowing  of sales in  Europe  during  the  summer  months  and
worldwide during the Christmas holidays.  Generally, our fourth quarter revenues
are lower than our revenues in each of the first three  quarters of the year. We
believe  that  period to period  comparisons  of our  operating  results may not
necessarily be reliable


                                       19





indicators  of our future  performance.  It is likely that in some future period
our  operating  results  will not meet  expectations  or those of public  market
analysts,  which could  result in  reductions  in the market price of our common
stock.

POTENTIAL  PRODUCT  LIABILITY  CLAIMS COULD  AFFECT OUR  EARNINGS AND  FINANCIAL
CONDITION.

We face a potential risk of liability claims based on our products and services,
and we have faced such claims in the past. We carry product liability  insurance
coverage  which is  limited  in scope  and  amount  but which we  believe  to be
adequate.  We cannot assure you, however,  that we will be able to maintain this
insurance at reasonable cost and on reasonable terms. We also cannot assure that
this insurance will be adequate to protect us against a product liability claim,
should one arise.

THE  LABOR  LAWS  APPLICABLE  TO  OUR  EMPLOYEES  IN  EUROPE  MAY  RESTRICT  THE
FLEXIBILITY OF OUR MANAGEMENT.

As of May 1,  2002,  55 of our 261  employees  worked for our  BioSource  Europe
subsidiary,  which is located in Nivelles, Belgium. As a result of Belgian labor
laws,  we are  required  to make  specified  severance  payments in the event we
terminate a European employee. Accordingly, our management may be limited by the
application of the Belgian labor laws in the  determination  of staffing levels,
and may have less flexibility in making such determinations than our competitors
whose employees are not subject to similar labor laws.

                       RISKS ASSOCIATED WITH OUR INDUSTRY

THE BIOMEDICAL  RESEARCH PRODUCTS  INDUSTRY IS VERY  COMPETITIVE,  AND WE MAY BE
UNABLE TO CONTINUE TO COMPETE EFFECTIVELY IN THIS INDUSTRY IN THE FUTURE.

We are engaged in a segment of the biomedical research products industry that is
highly  competitive.  We compete with many other  suppliers and new  competitors
continue  to enter the  markets.  Many of our  competitors,  both in the  United
States and  elsewhere,  are major  pharmaceutical,  chemical  and  biotechnology
companies,  and  many of them  have  substantially  greater  capital  resources,
marketing  experience,  research and development  staffs, and facilities than we
do. Any of these  companies  could succeed in developing  products that are more
effective  than the  products  that we have or may  develop and may also be more
successful  than us in producing and marketing  their  products.  We expect this
competition to continue and intensify in the future.  Competition in our markets
is primarily driven by:

o    product performance, features and liability;

o    price;

o    timing of product introductions;

o    ability  to  develop,   maintain  and  protect  proprietary   products  and
     technologies;

o    sales and distribution capabilities;

o    technical support and service;

o    brand royalty;

o    applications support; and

o    breadth of product line.

If a competitor develops superior  technology or cost-effective  alternatives to
our products, our business,  financial condition and results of operations could
be materially adversely affected.


                                       20





Our industry has also seen substantial  consolidation in recent years, which has
led to the creation of  competitors  with  greater  financial  and  intellectual
property resources than us. In addition, we believe that the success that others
have had in our industry will attract new  competitors.  Some of our current and
future  competitors  also may cooperate to better compete against us. We may not
be able to compete  effectively  against  these  current or future  competitors.
Increased competition could result in price reductions for our products, reduced
margins  and loss of market  share,  any of which  could  adversely  impact  our
business, financial condition and results of operations.

AS A  RESULT  OF  CONSOLIDATION  IN THE  PHARMACEUTICAL  INDUSTRY,  WE MAY  LOSE
EXISTING CUSTOMERS OR HAVE GREATER DIFFICULTY OBTAINING NEW CUSTOMERS.

In recent  years,  the  United  States  pharmaceutical  industry  has  undergone
substantial  consolidation.  As part of many  business  combinations,  companies
frequently  reduce the number of suppliers  used and we may not be selected as a
supplier  after  any  business  combination.   Further,   mergers  or  corporate
consolidations  in the  pharmaceutical  industry could cause us to lose existing
customers and potential  future  customers,  which could have a material adverse
effect on our business, financial condition and results of operations.

WE ARE CURRENTLY SUBJECT TO GOVERNMENT REGULATION.

Our business is currently  subject to regulation,  supervision  and licensing by
federal,  state and local governmental  authorities.  Also, from time to time we
must expend  resources  to comply  with newly  adopted  regulations,  as well as
changes in existing regulations. If we fail to comply with these regulations, we
could be subject to disciplinary actions or administrative  enforcement actions.
These actions could result in penalties, including fines.

                     RISKS ASSOCIATED WITH OUR COMMON STOCK

OUR STOCK PRICE HAS BEEN VOLATILE.

Our common  stock is quoted on the Nasdaq  National  Market,  and there has been
substantial  volatility  in the market  price of our common  stock.  The trading
price of our common stock has been,  and is likely to continue to be, subject to
significant fluctuations due to a variety of factors, including:

o    fluctuations in our quarterly operating and earnings per share results;

o    the gain or loss of significant contracts;

o    loss of key personnel;

o    announcements  of  technological  innovations  or new products by us or our
     competitors;

o    delays in the development and introduction of new products;

o    legislative or regulatory changes;

o    general trends in the industry;

o    recommendations  and/or changes in estimates by equity and market  research
     analysts;

o    biological or medical discoveries;

o    disputes and/or developments  concerning  intellectual property,  including
     patents and litigation matters;

o    public concern as to the safety of new technologies;

o    sales of common stock of existing holders;


                                       21





o    securities class action or other litigation;

o    developments  in our  relationships  with current or future  customers  and
     suppliers; and

o    general economic conditions, both in the United States and abroad.

As a result of these factors,  and  potentially  others,  the sales price of our
common  stock has ranged  from  $2.41 to $32.00 per share from  January 1, 1998,
through  May 3, 2002,  and from  $5.19 to $8.20 per share from  January 1, 2002,
through May 3, 2002.

In  addition,  the stock  market in general has  experienced  extreme  price and
volume  fluctuations that have affected the market price of our common stock, as
well as the stock of many biotechnology companies. Often, price fluctuations are
unrelated to operating  performance  of the  specific  companies  whose stock is
affected.

In the past,  following periods of volatility in the market price of a company's
stock,  securities  class action  litigation  has  occurred  against the issuing
company.  If we were subject to this type of litigation in the future,  we could
incur  substantial  costs and a  diversion  of our  management's  attention  and
resources, each of which could have a material adverse effect on our revenue and
earnings.  Any  adverse  determination  in this type of  litigation  could  also
subject us to significant liabilities.

ANTI-TAKEOVER  PROVISIONS IN OUR GOVERNING  DOCUMENTS AND UNDER  APPLICABLE  LAW
COULD IMPAIR THE ABILITY OF A THIRD PARTY TO TAKE OVER OUR COMPANY.

We are subject to various  legal and  contractual  provisions  that may impede a
change in our control, including the following:

o    our  adoption of a  stockholders'  rights  plan,  which could result in the
     significant  dilution  of the  proportionate  ownership  of any person that
     engages in an unsolicited attempt to take over our company; and

o    the ability of our board of  directors  to issue  additional  shares of our
     preferred stock,  which shares may be given superior  voting,  liquidation,
     distribution and other rights as compared to our common stock.

These   provisions,   as  well  as  other   provisions  in  our  certificate  of
incorporation  and bylaws and under the Delaware General  Corporations  Law, may
make it more  difficult  for a third party to acquire our  company,  even if the
acquisition  attempt was at a premium  over the market value of our common stock
at that time.

Our principal  stockholders  and management own a significant  percentage of our
capital  stock  and  will be able to  exercise  significant  influence  over our
affairs.  Our executive  officers,  directors and  principal  stockholders  will
continue to beneficially own 34.3% of our outstanding  common stock,  based upon
the  beneficial  ownership of our common  stock as of May 1, 2002.  In addition,
these same persons also hold options to acquire  additional shares of our common
stock, which may increase their percentage ownership of the common stock further
in the future. Accordingly, these stockholders:

o    will be able to  significantly  influence the  composition  of our board of
     directors;

o    will significantly  influence all matters requiring  stockholder  approval,
     including change of control transactions; and

o    will continue to have significant influence over our business.

This  concentration  of  ownership  of our common stock could have the effect of
delaying or  preventing  a change of control of us or otherwise  discouraging  a
potential  acquirer from  attempting to obtain control of us. This in turn could
have a negative  effect on the market price of our common  stock.  It could also
prevent our  stockholders  from  realizing a premium over the market  prices for
their shares of common stock.


                                       22





OUR PRINCIPAL  STOCKHOLDERS  AND MANAGEMENT OWN A SIGNIFICANT  PERCENTAGE OF OUR
CAPITAL  STOCK  AND  WILL BE ABLE TO  EXERCISE  SIGNIFICANT  INFLUENCE  OVER OUR
AFFAIRS.

Our executive officers,  directors and principal  stockholders  beneficially own
approximately  34.3% of our outstanding  common stock, based upon the beneficial
ownership  of  our  common  stock  as  of  May  1,  2002.  As  a  result,  these
stockholders,  if they act  together,  could exert  substantial  influence  over
matters requiring stockholder approval,  including the election of directors and
approval of mergers and other  significant  corporate  transactions.  The voting
power of such persons may have the effect of delaying, preventing or deterring a
change in control, and could affect the market price of our common stock.

ABSENCE OF DIVIDENDS COULD REDUCE OUR ATTRACTIVENESS TO YOU.

Some  investors  favor  companies that pay  dividends,  particularly  in general
downturns in the stock market. We have never declared or paid any cash dividends
on our common  stock.  We  currently  intend to retain any future  earnings  for
funding growth and we do not currently  anticipate  paying cash dividends on our
common stock in the foreseeable  future.  Because we may not pay dividends,  the
return on this investment likely depends on selling this stock at a profit.


ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES OF MARKET RISK:

We conduct business in various foreign  currencies and are therefore  subject to
the  transaction  exposures  that arise from  foreign  exchange  rate  movements
between the dates that foreign currency  transactions are initiated and the date
that they are converted.  We are also subject to certain  exposures arising from
the  translation  and  consolidation  of the  financial  results of our  foreign
subsidiaries.  There can be no  assurance  that  actions  taken to  manage  such
exposures  will  continue to be  successful  or that future  changes in currency
exchange  rates will not have a material  impact on our future cash  collections
and operating results.  We do not currently hedge either our transaction risk or
our economic risk.


                                     PART II

                                OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

On June 14, 2000, one of our former employees,  Jordan Fishman,  Ph.D.,  filed a
legal  action  against  us in  the  United  States  Central  District  Court  of
California alleging breach of Dr. Fishman's Employment Agreement and a number of
other causes of action. BioSource filed a counter claim against Dr. Fishman, and
a number of pre-trial  motions,  the result of which was that only the breach of
contract claim and BioSource's  counter claim remained for trial. On January 14,
2002,  shortly before the scheduled trial date,  plaintiff  agreed to settle the
case and the  DiSorbo  Lawsuit  discussed  below for  $275,000.  This amount was
included in our consolidated  financial  results for the year ended December 31,
2001.

Dr.  Fishman  also sued  Dennis  DiSorbo,  Ph.D.,  a Vice  President  of our QCB
division,  in the Superior  Court of Worcester,  Massachusetts,  for  wrongfully
interfering with his employment contract with BioSource (the "DiSorbo Lawsuit").
The DiSorbo  Lawsuit  was stayed  pending the  determination  of the  California
Lawsuit.  The  parties  agreed  to settle  the  DiSorbo  Lawsuit  as part of the
settlement of the California Lawsuit without additional consideration.

In June of 2000,  the former  shareholders  of QCB  commenced a AAA  arbitration
proceeding  against the Company  seeking the recovery of escrowed funds from the
purchase of QCB that were withheld  from the purchase  price paid by the Company
as security for claims the Company might discover after closing. The Company has
counterclaimed against the former shareholders of QCB, including Dr. Fishman, in
the  arbitration  to recover  damages  management  believes  it has  suffered in
connection  with  inaccuracies  in, and/or breaches of the  representations  and
warranties  contained in the original Stock Purchase  Agreement for QCB executed
on December


                                       23





9, 1998.  The Company  seeks to recover  $1,347,000  of escrowed  funds for this
claim.  In addition,  the Company also brought a fraud claim against Dr. Fishman
for the intentional  misrepresentations  and/or  omissions he made in connection
with the Stock  Purchase  Agreement.  In its fraud claim,  the Company  seeks to
recover the amount of its  overpayment  for the  purchase of QCB,  the amount of
lost profits that BioSource would reasonably have anticipated and earned had QCB
possessed the characteristics  fraudulently  attributed to it, punitive damages,
and  attorneys'  fees and  costs.  The  parties  have  selected a panel of three
arbitrators  who will  hear the  dispute.  The  parties  are in the  process  of
conducting discovery in connection with the arbitration.  Discovery is scheduled
to conclude on July 15, 2002.  The  arbitration is scheduled to begin on October
2, 2002. The company has not recorded an accrual for any potential gain realized
upon a successful  recovery of any or all of the escrowed  funds or  recoverable
damages. The Company is expensing all legal fees as they are incurred.

The Company is involved in various  other claims and lawsuits  incidental to its
business. In the opinion of management,  these claims and suits in the aggregate
will not  materially  affect the  financial  position,  results of operations or
liquidity of the Company.

ITEM 2.  CHANGE IN SECURITIES AND USE OF PROCEEDS
         None

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES
         None.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
         None.

ITEM 5.  OTHER INFORMATION
         None.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

         (a)   Exhibits
                  None
         (b)   Reports on Form 8-K
                  Current  Report on Form 8-K dated  April 23,  2002,  reporting
                  Item 5 and filed with the Securities  and Exchange  Commission
                  on April 30, 2002.


                                       24





                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.




                                             BIOSOURCE INTERNATIONAL, INC.
                                                    (Registrant)




Date:  May 13, 2002                            /s/ LEONARD M. HENDRICKSON
                                               --------------------------
                                                  Leonard M. Hendrickson
                                                  President and
                                                  Chief Executive Officer




Date:  May 13, 2002                            /s/ CHARLES C. BEST
                                               -------------------
                                                  Charles C. Best
                                                  Executive Vice President and
                                                  Chief Financial Officer


                                       25