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SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q



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

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2006

OR



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from  to

Commission
file number: 000-25317

INVITROGEN CORPORATION

(Exact name of registrant as specified in its charter)



|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Delaware                                                       |  | 33-0373077                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)



|                                         |  |           
|---------------------------------------- |  | ----------
|1600 Faraday Avenue, Carlsbad, CA        |  | 92008     
|(Address of principal executive offices) |  | (Zip Code)

Registrants telephone number, including area code: (760) 603-7200

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 period 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 ̈.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2
of the Exchange Act. (Check One)

Large accelerated filer  x                Accelerated filer ̈Non-accelerated filer ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 126-2 of the Act).
Yes ̈or No  x

As of April 26, 2006, there were 53,206,877 shares of the registrants Common Stock, par value $.01 per share, outstanding.



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PART I. FINANCIAL INFORMATION



|ITEM 1. | FINANCIAL STATEMENTS
|------- | --------------------

INVITROGEN CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par value and share data)



|                                                                                                                    |  |               |           |   |                  |   |           |  
|------------------------------------------------------------------------------------------------------------------- |  | ------------- | --------- | - | ---------------- | - | --------- | -
|                                                                                                                    |  | March 31,2006 |           |   | December 31,2005 |  
|                                                                                                                    |  | (Unaudited)   |           |   |                  |  
|ASSETS                                                                                                              |  |               |           |   |                  |   |           |  
|Current Assets:                                                                                                     |  |               |           |   |                  |   |           |  
|Cash and cash equivalents                                                                                           |  | $             | 479,982   |   |                  | $ | 435,230   |  
|Short-term investments                                                                                              |  |               | 230,992   |   |                  |   | 310,510   |  
|Restricted cash and investments                                                                                     |  |               | 4,650     |   |                  |   | 6,132     |  
|Trade accounts receivable, net of allowance for doubtful accounts of $5,176 and $5,368, respectively                |  |               | 195,056   |   |                  |   | 194,942   |  
|Inventories                                                                                                         |  |               | 145,786   |   |                  |   | 136,753   |  
|Deferred income tax assets                                                                                          |  |               | 39,958    |   |                  |   | 35,147    |  
|Prepaid expenses                                                                                                    |  |               | 16,418    |   |                  |   | 16,972    |  
|Other current assets                                                                                                |  |               | 16,539    |   |                  |   | 15,510    |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total current assets                                                                                                |  |               | 1,129,381 |   |                  |   | 1,151,196 |  
|Long-term investments                                                                                               |  |               | 27        |   |                  |   | 187       |  
|Property and equipment, net                                                                                         |  |               | 280,531   |   |                  |   | 278,447   |  
|Goodwill                                                                                                            |  |               | 1,882,477 |   |                  |   | 1,866,288 |  
|Intangible assets, net                                                                                              |  |               | 468,589   |   |                  |   | 490,996   |  
|Deferred income tax assets                                                                                          |  |               | 5,442     |   |                  |   | 4,306     |  
|Other assets                                                                                                        |  |               | 84,053    |   |                  |   | 85,629    |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total assets                                                                                                        |  | $             | 3,850,500 |   |                  | $ | 3,877,049 |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|LIABILITIES AND STOCKHOLDERS EQUITY                                                                                |  |               |           |   |                  |   |           |  
|Current Liabilities:                                                                                                |  |               |           |   |                  |   |           |  
|Current portion of long-term debt                                                                                   |  | $             | 189,745   |   |                  | $ | 234,246   |  
|Accounts payable                                                                                                    |  |               | 81,972    |   |                  |   | 85,335    |  
|Accrued expenses and other current liabilities                                                                      |  |               | 124,381   |   |                  |   | 159,009   |  
|Income taxes                                                                                                        |  |               | 44,448    |   |                  |   | 32,987    |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total current liabilities                                                                                           |  |               | 440,546   |   |                  |   | 511,577   |  
|Long-term debt                                                                                                      |  |               | 1,151,902 |   |                  |   | 1,151,923 |  
|Pension liabilities                                                                                                 |  |               | 19,934    |   |                  |   | 16,431    |  
|Deferred income tax liabilities                                                                                     |  |               | 132,738   |   |                  |   | 141,432   |  
|Other long-term obligations, deferred credits and reserves                                                          |  |               | 13,279    |   |                  |   | 13,892    |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total liabilities                                                                                                   |  |               | 1,758,399 |   |                  |   | 1,835,255 |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Commitments and contingencies (Note 8)                                                                              |  |               |           |   |                  |   |           |  
|Stockholders Equity:                                                                                               |  |               |           |   |                  |   |           |  
|Preferred stock; $0.01 par value, 6,405,884 shares authorized; no shares issued or outstanding                      |  |               |          |   |                  |   |          |  
|Common stock; $0.01 par value, 125,000,000 shares authorized; 58,526,504 and 58,289,752 shares issued, respectively |  |               | 585       |   |                  |   | 583       |  
|Additional paid-in-capital                                                                                          |  |               | 2,166,353 |   |                  |   | 2,158,565 |  
|Deferred compensation                                                                                               |  |               |          |   |                  |   | (16,023   | )
|Accumulated other comprehensive (loss) income                                                                       |  |               | (9,412    | ) |                  |   | (16,688   | )
|Retained earnings                                                                                                   |  |               | 155,595   |   |                  |   | 136,377   |  
|Less cost of treasury stock: 5,331,562 shares at March 31, 2006 and December 31, 2005                               |  |               | (221,020  | ) |                  |   | (221,020  | )
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total stockholders equity                                                                                          |  |               | 2,092,101 |   |                  |   | 2,041,794 |  
|                                                                                                                    |  |               |           |   |                  |   |           |  
|Total liabilities and stockholders equity                                                                          |  | $             | 3,850,500 |   |                  | $ | 3,877,049 |  
|                                                                                                                    |  |               |           |   |                  |   |           |  

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



2



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INVITROGEN CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share data)



|                                                       |  |                                     |         |   |      |   |         |  
|------------------------------------------------------ |  | ----------------------------------- | ------- | - | ---- | - | ------- | -
|                                                       |  | For the Three MonthsEnded March 31, |        
|                                                       |  | 2006                                |         |   | 2005 |  
|                                                       |  | (Unaudited)                         |        
|Revenues                                               |  | $                                   | 309,004 |   |      | $ | 277,081 |  
|Cost of revenues                                       |  |                                     | 119,347 |   |      |   | 106,422 |  
|                                                       |  |                                     |         |   |      |   |         |  
|Gross profit                                           |  |                                     | 189,657 |   |      |   | 170,659 |  
|                                                       |  |                                     |         |   |      |   |         |  
|Operating Expenses:                                    |  |                                     |         |   |      |   |         |  
|Sales and marketing                                    |  |                                     | 60,191  |   |      |   | 48,480  |  
|General and administrative                             |  |                                     | 39,422  |   |      |   | 30,004  |  
|Research and development                               |  |                                     | 28,900  |   |      |   | 21,241  |  
|Purchased intangibles amortization                     |  |                                     | 29,952  |   |      |   | 25,901  |  
|Purchased in-process research and development          |  |                                     |        |   |      |   | 1,200   |  
|Business consolidation costs                           |  |                                     | 2,131   |   |      |   |        |  
|                                                       |  |                                     |         |   |      |   |         |  
|Total operating expenses                               |  |                                     | 160,596 |   |      |   | 126,826 |  
|                                                       |  |                                     |         |   |      |   |         |  
|Operating income                                       |  |                                     | 29,061  |   |      |   | 43,833  |  
|                                                       |  |                                     |         |   |      |   |         |  
|Other income (expense):                                |  |                                     |         |   |      |   |         |  
|Interest income                                        |  |                                     | 6,466   |   |      |   | 5,876   |  
|Interest expense                                       |  |                                     | (8,369  | ) |      |   | (7,258  | )
|Other income, net                                      |  |                                     | 454     |   |      |   | 25,673  |  
|                                                       |  |                                     |         |   |      |   |         |  
|Total other income (expense), net                      |  |                                     | (1,449  | ) |      |   | 24,291  |  
|                                                       |  |                                     |         |   |      |   |         |  
|Income before provision for income taxes               |  |                                     | 27,612  |   |      |   | 68,124  |  
|Income tax provision                                   |  |                                     | (8,394  | ) |      |   | (21,050 | )
|                                                       |  |                                     |         |   |      |   |         |  
|Net income                                             |  | $                                   | 19,218  |   |      | $ | 47,074  |  
|                                                       |  |                                     |         |   |      |   |         |  
|Earnings per common share:                             |  |                                     |         |   |      |   |         |  
|Basic                                                  |  | $                                   | 0.36    |   |      | $ | 0.91    |  
|                                                       |  |                                     |         |   |      |   |         |  
|Diluted                                                |  | $                                   | 0.35    |   |      | $ | 0.82    |  
|                                                       |  |                                     |         |   |      |   |         |  
|Weighted average shares used in per share calculation: |  |                                     |         |   |      |   |         |  
|Basic                                                  |  |                                     | 53,000  |   |      |   | 51,455  |  
|Diluted                                                |  |                                     | 54,822  |   |      |   | 60,229  |  

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



3



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INVITROGEN CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)



|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------------ | ------- | - | ---- | - | -------- | -
|                                                                                                                                      |  | For the Three Months Ended March 31, |        
|                                                                                                                                      |  | 2006                                 |         |   | 2005 |  
|                                                                                                                                      |  | (Unaudited)                          |        
|CASH FLOWS FROM OPERATING ACTIVITIES:                                                                                                 |  |                                      |         |   |      |   |          |  
|Net income                                                                                                                            |  | $                                    | 19,218  |   |      | $ | 47,074   |  
|Adjustments to reconcile net income to net cash provided by operating activities, net of effects of businesses acquired and
divested: |  |                                      |         |   |      |   |          |  
|Depreciation                                                                                                                          |  |                                      | 10,019  |   |      |   | 9,247    |  
|Amortization of intangible assets                                                                                                     |  |                                      | 30,455  |   |      |   | 26,897   |  
|Amortization of deferred debt issue costs                                                                                             |  |                                      | 597     |   |      |   | 870      |  
|Amortization of premiums on investments, net of accretion of discounts                                                                |  |                                      | (1,339  | ) |      |   | 1,926    |  
|Share-based compensation                                                                                                              |  |                                      | 12,045  |   |      |   | 1,525    |  
|Incremental tax benefits from stock options exercised                                                                                 |  |                                      | (1,485  | ) |      |   |         |  
|Deferred income taxes                                                                                                                 |  |                                      | (15,510 | ) |      |   | (6,094   | )
|In-process research and development                                                                                                   |  |                                      |        |   |      |   | 1,200    |  
|Other non-cash adjustments                                                                                                            |  |                                      | 3,528   |   |      |   | 2,088    |  
|Changes in operating assets and liabilities:                                                                                          |  |                                      |         |   |      |   |          |  
|Trade accounts receivable                                                                                                             |  |                                      | 910     |   |      |   | (14,901  | )
|Inventories                                                                                                                           |  |                                      | (12,036 | ) |      |   | (2,914   | )
|Prepaid expenses and other current assets                                                                                             |  |                                      | (428    | ) |      |   | 6,028    |  
|Other assets                                                                                                                          |  |                                      | 895     |   |      |   | (2,404   | )
|Accounts payable                                                                                                                      |  |                                      | (3,557  | ) |      |   | (3,953   | )
|Accrued expenses and other current liabilities                                                                                        |  |                                      | (25,576 | ) |      |   | (22,006  | )
|Income taxes                                                                                                                          |  |                                      | 15,443  |   |      |   | 18,427   |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Net cash provided by operating activities                                                                                             |  |                                      | 33,179  |   |      |   | 63,010   |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|CASH FLOWS FROM INVESTING ACTIVITIES:                                                                                                 |  |                                      |         |   |      |   |          |  
|Maturities of available-for-sale securities                                                                                           |  |                                      | 82,980  |   |      |   | 598,088  |  
|Purchases of available-for-sale securities                                                                                            |  |                                      |        |   |      |   | (134,692 | )
|Net cash paid for business combinations                                                                                               |  |                                      | (19,057 | ) |      |   | (63,243  | )
|Purchases of property and equipment                                                                                                   |  |                                      | (14,191 | ) |      |   | (11,865  | )
|Payments for intangible assets                                                                                                        |  |                                      | (6,058  | ) |      |   | (253     | )
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Net cash provided by investing activities                                                                                             |  |                                      | 43,674  |   |      |   | 388,035  |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|CASH FLOWS FROM FINANCING ACTIVITIES:                                                                                                 |  |                                      |         |   |      |   |          |  
|Proceeds from long-term obligations                                                                                                   |  |                                      |        |   |      |   | 700      |  
|Principal payments on long-term obligations                                                                                           |  |                                      | (45,098 | ) |      |   | (10,881  | )
|Proceeds from sale of common stock                                                                                                    |  |                                      | 10,287  |   |      |   | 19,076   |  
|Incremental tax benefits from stock options exercised                                                                                 |  |                                      | 1,485   |   |      |   |         |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Net cash (used in) provided by financing activities                                                                                   |  |                                      | (33,326 | ) |      |   | 8,895    |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Effect of exchange rate changes on cash                                                                                               |  |                                      | 1,225   |   |      |   | (17,552  | )
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Net increase in cash and cash equivalents                                                                                             |  |                                      | 44,752  |   |      |   | 442,388  |  
|Cash and cash equivalents, beginning of period                                                                                        |  |                                      | 435,230 |   |      |   | 198,396  |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  
|Cash and cash equivalents, end of period                                                                                              |  | $                                    | 479,982 |   |      | $ | 640,784  |  
|                                                                                                                                      |  |                                      |         |   |      |   |          |  

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



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INVITROGEN CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)



|1. | Basis of Presentation
|-- | ---------------------

Financial Statement Preparation

The unaudited condensed consolidated financial statements have been prepared by Invitrogen Corporation according to the rules and
regulations of the Securities and Exchange Commission (SEC), and therefore, certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have
been condensed or omitted.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements for the
periods presented reflect all adjustments, which are normal and recurring, necessary to fairly state the financial position, results of operations and cash flows. These unaudited condensed consolidated financial statements should be read in
conjunction with the audited financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2005 filed with the Securities and Exchange Commission (SEC) on March 1, 2006.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make
estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting
period. Actual results could differ from those estimates. During the three months ended March 31, 2006, the Company revised its estimated royalty obligation due to retroactive changes made to certain licensing agreements.

Principles of Consolidation

The condensed
consolidated financial statements include the accounts of Invitrogen Corporation and its majority owned or controlled subsidiaries collectively referred to as Invitrogen (the Company). All significant intercompany accounts and transactions have been
eliminated.

Long-Lived Assets

The Company periodically re-evaluates the original assumptions and rationale utilized in the establishment of the carrying value and estimated lives of its long-lived assets. The criteria used for these evaluations include managements
estimate of the assets continuing ability to generate income from operations and positive cash flow in future periods as well as the strategic significance of any intangible asset to the Companys business objectives. If assets are
considered to be impaired, the impairment recognized is the amount by which the carrying value of the assets exceeds the fair value of the assets, which is determined by applicable market prices, when available.

Computation of Earnings Per Share

Basic
earnings per share was computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflects the potential dilution that could occur from the following items:



| |  |  | Convertible subordinated notes and contingently convertible notes where the effect of those securities is dilutive;
| | - |  | -------------------------------------------------------------------------------------------------------------------



| |  |  | Dilutive stock options; and
| | - |  | ---------------------------



| |  |  | Unvested restricted stock
| | - |  | -------------------------



5



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Computations for basic and diluted earnings per share are as follows:



|                                                                                |  |                    |        |                     |        |                    |   |     
|------------------------------------------------------------------------------- |  | ------------------ | ------ | ------------------- | ------ | ------------------ | - | ----
|(in thousands, except per share data)                                           |  | Income (Numerator) |        | Shares(Denominator) |        | Earnings Per Share
|Three Months Ended March 31, 2006                                               |  |                    |        |                     |        |                    |   |     
|Basic earnings per share:                                                       |  |                    |        |                     |        |                    |   |     
|Net income                                                                      |  | $                  | 19,218 |                     | 53,000 |                    | $ | 0.36
|                                                                                |  |                    |        |                     |        |                    |   |     
|Diluted earnings per share:                                                     |  |                    |        |                     |        |                    |   |     
|Dilutive stock options                                                          |  |                    |       |                     | 841    |                    |   |     
|Unvested restricted stock                                                       |  |                    |       |                     | 82     |                    |   |     
|2% Convertible Senior Notes due 2023                                            |  |                    | 117    |                     | 610    |                    |   |     
|11/2%
Convertible Senior Notes due 2024                                         |  |                    | 72     |                     | 289    |                    |   |     
|                                                                                |  |                    |        |                     |        |                    |   |     
|Net income plus assumed conversions                                             |  | $                  | 19,407 |                     | 54,822 |                    | $ | 0.35
|                                                                                |  |                    |        |                     |        |                    |   |     
|Potentially dilutive securities not included above since they are antidilutive: |  |                    |        |                     |        |                    |   |     
|Antidilutive stock options                                                      |  |                    |        |                     | 4,184  |                    |   |     
|21/4%
Convertible Subordinated Notes due 2006                                   |  |                    |        |                     | 2,591  |                    |   |     
|Three Months Ended March 31, 2005                                               |  |                    |        |                     |        |                    |   |     
|Basic earnings per share:                                                       |  |                    |        |                     |        |                    |   |     
|Net income                                                                      |  | $                  | 47,074 |                     | 51,455 |                    | $ | 0.91
|                                                                                |  |                    |        |                     |        |                    |   |     
|Diluted earnings per share:                                                     |  |                    |        |                     |        |                    |   |     
|Dilutive stock options                                                          |  |                    |       |                     | 1,461  |                    |   |     
|Unvested restricted stock                                                       |  |                    |       |                     | 175    |                    |   |     
|21/4%
Convertible Subordinated Notes due 2006                                   |  |                    | 2,099  |                     | 5,807  |                    |   |     
|2% Convertible Senior Notes due 2023                                            |  |                    | 190    |                     | 954    |                    |   |     
|11/2%
Convertible Senior Notes due 2024                                         |  |                    | 93     |                     | 377    |                    |   |     
|                                                                                |  |                    |        |                     |        |                    |   |     
|Net income plus assumed conversions                                             |  | $                  | 49,456 |                     | 60,229 |                    | $ | 0.82
|                                                                                |  |                    |        |                     |        |                    |   |     
|Potentially dilutive securities not included above since they are antidilutive: |  |                    |        |                     |        |                    |   |     
|Antidilutive stock options                                                      |  |                    |        |                     | 1,318  |                    |   |     

Share-Based Compensation

The Company has ten stock option plans: the 1995, 1997, 2000, 2001, 2002 and 2004 Invitrogen Corporation stock option plans, the 1996 and 1998 NOVEX Stock
Option/Stock Issuance Plans, the Life Technologies 1995 and 1997 Long-Term Incentive Plans. During 2004, the Companys shareholders approved the 2004 Invitrogen Equity Incentive Plan (the 2004 Plan), which replaced the Companys 1997,
2000, 2001 and 2002 stock option plans (collectively, the Prior Plans). Upon approval of the 2004 Plan, all Prior Plans were frozen and a total of 5.7 million shares of the Companys common stock were reserved for granting of new awards
under the 2004 Plan. The 2004 Plan share reserve includes all options and other awards that the Company has granted that are still outstanding under the Prior Plans as of December 31, 2005. Pursuant to an employment agreement entered in May
2003, the Company granted an option to purchase 675,000 shares of the Companys common stock to its Chief Executive Officer, which is not included in any of the Companys option plans discussed above.

The Companys 2004 Plan permits the granting of stock options, stock appreciation rights, restricted stock awards, restricted stock units,
performance awards and deferred stock awards of up to 10.8 million shares of stock. Shares of the Companys common stock granted under the 2004 Plan in the form of stock options or stock appreciation rights are counted against the 2004
Plan share reserve on a one for one basis. Shares of the Companys common stock granted under the 2004 Plan as an award other than as an option or as a stock appreciation right are counted against the 2004 Plan share reserve on a 1.6 shares for
each share of common stock basis. Stock option awards are granted to eligible employees and directors at an exercise price equal to no less than the fair market value of such stock on the date of grant, generally vest over a period of time ranging
up to four years, are exercisable in whole or in installments and expire ten years from the date of grant. Restricted stock awards and restricted stock units are granted to eligible employees and directors and represent rights to receive shares of
common stock at a future date. In addition, the Company has a qualified employee stock purchase plan (purchase rights) whereby eligible employees may elect to withhold up to 15% of their compensation to purchase shares of the
Companys stock on a quarterly basis at a discounted price equal to 85% of the lower of the employees offering price or the closing price of the stock on the date of purchase.



6



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In December 2004, the Financial Accounting Standards Board (FASB) issued Statement of Financial
Accounting Standards No. 123 (revised 2004), Share-Based Payment (SFAS 123R), which revised Statement of Financial Accounting Standards No. 123, Accounting for Stock-Based Compensation (SFAS 123), supersedes APB
Opinion No. 25, Accounting for Stock Issued to Employees (APB 25) and amends Statement of Financial Accounting Standards No. 95, Statement of Cash Flows (SFAS 95). SFAS 123R establishes the accounting for
share-based awards exchanged for employee services and requires companies to expense the estimated fair value of these awards over the requisite employee service period. The provisions of SFAS 123R are effective for the Company beginning
January 1, 2006. Prior to January 1, 2006, the Company accounted for its share-based awards under the recognition and measurement principles of APB 25 and its related interpretations and adopted the disclosure only provision of SFAS 123.
Accordingly, no compensation cost was recognized for the employee stock option plan or employee stock purchase plan under the fair value recognition provisions of SFAS 123. Effective January 1, 2006, the Company adopted the provisions of SFAS
123R using the modified-prospective-transition method. Under this method, share-based compensation cost is measured at the grant date based on the estimated fair value of the award and is recognized as expense over the employees requisite
service period for all share-based awards granted, modified or cancelled as of January 1, 2006. The Company did not have any awards with market or performance conditions outstanding as of March 31, 2006.

The Company used the Black-Scholes option-pricing model (Black-Scholes model) to value share-based employee stock option and purchase right awards, which
was also used for the Companys pro forma disclosure required under FAS 123 prior to adoption of SFAS 123R on January 1, 2006. The determination of fair value of stock-based payment awards using an option-pricing model requires the use of
certain estimates and assumptions that affect the reported amount of share-based compensation cost recognized in the Condensed Consolidated Statements of Income. Among these include the expected term of options, the expected volatility of the
Companys stock price, the expected dividends and the risk-free interest rate.

The expected term of share-based awards represents the
weighted-average period the awards are expected to remain outstanding and is an input in the Black-Scholes model. In determining the expected term of options, the Company considered various factors including the vesting period of options granted,
employees historical exercise and post-vesting employment termination behavior, expected volatility of the Companys stock and aggregation by homogeneous employee groups. The Company used a combination of the historical volatility of its
stock price and the implied volatility of market-traded options of the Companys stock with terms of up to approximately two years to estimate the expected volatility assumption input to the Black-Scholes model in accordance with SFAS 123R and
the SECs Staff Accounting Bulletin No. 107 (SAB 107). In prior periods, the Company relied solely on the historical volatility of its stock price for its volatility assumption input to the Black-Scholes model. The Companys decision
to use a combination of historical and implied volatility was based upon the availability of actively traded options of its stock and its assessment that such a combination was more representative of future expected stock price trends. The expected
dividend yield assumption is based on the Companys expectation of future dividend payouts. The Company has never declared or paid any cash dividends on its common stock and currently does not anticipate paying such cash dividends. However,
this assumption may be subject to substantial change in the future. The Company currently anticipates that it will retain all of its future earnings for use in the development and expansion of its business and for general corporate purposes. Any
determination to pay dividends in the future will be at the discretion of the Companys Board of Directors and will depend upon the Companys results of operations, financial condition, tax laws, and other factors as the Board of
Directors, in its discretion, deems relevant. The risk-free interest rate is based upon U.S. Treasury securities with remaining terms similar to the expected term of the share-based awards.

The underlying assumptions used to value employee stock options and purchase rights granted during the three months ended March 31, 2006 were as
follows:



|                                                          |  |         |         |   |                |   |         |  
|--------------------------------------------------------- |  | ------- | ------- | - | -------------- | - | ------- | -
|                                                          |  | Options |         |   | PurchaseRights |  
|Weighted average risk free interest rate                  |  |         | 4.56    | % |                |   | 4.82    | %
|Expected term of share-based awards                       |  |         | 4.2 yrs |   |                |   | 1.1 yrs |  
|Expected stock price volatility                           |  |         | 35      | % |                |   | 35      | %
|Expected dividend yield                                   |  |         | 0       | % |                |   | 0       | %
|Weighted average fair value of share-based awards granted |  | $       | 25.46   |   |                | $ | 21.29   |  

SFAS 123R also requires the benefits of tax deductions in excess of recognized compensation cost
to be reported as a financing cash flow, rather than as an operating cash flow as permitted under APB 25. As a result, the Companys net operating cash flows decreased by $1.5 million and net financing cash flows increased by $1.5 million.

The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods on a cumulative
basis in the period the estimated forfeiture rate changes. The Company considered its historical experience of pre-vesting option forfeitures as the basis to arrive at its estimated pre-vesting option forfeiture rate of 9% per year for the
three



7



---

months ended March 31, 2006. All option awards, including those with graded vesting, were valued as a single award with a single average expected term
and are amortized on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. At March 31, 2006, there was $60.4 million remaining in unrecognized compensation cost related to employee stock
options (including stock options assumed in business combinations), which is expected to be recognized over a weighted average period of 2.0 years. No compensation cost was capitalized during the three months ended March 31, 2006.

Total share-based compensation expense for employee stock options (including stock options assumed in business combinations) and purchase rights
recognized for the three months ended March 31, 2006 was comprised of the following:



|                                                       |  |   |       
|------------------------------------------------------ |  | - | ------
|(in thousands, except per share amounts)               |  |  
|Cost of revenues                                       |  | $ | 737   
|Sales and marketing                                    |  |   | 1,211 
|General and administrative                             |  |   | 7,313 
|Research and development                               |  |   | 1,048 
|                                                       |  |   |       
|Share-based compensation expense before taxes          |  |   | 10,309
|Related income tax benefits                            |  |   | 2,374 
|                                                       |  |   |       
|Share-based compensation expense, net of taxes         |  | $ | 7,935 
|                                                       |  |   |       
|Net share-based compensation expense per common share: |  |   |       
|Basic                                                  |  | $ | 0.15  
|Diluted                                                |  | $ | 0.14  

The weighted average grant-date fair value of options granted during the three months ended March 31, 2006
was $25.46. The total intrinsic value of options exercised during the three months ended March 31, 2006 was $4.8 million. Total cash received from the exercise of employee stock options and purchase rights was $7.7 million and $2.6 million,
respectively, for the three months ended March 31, 2006. A summary of employee stock option activity as of March 31, 2006 and during the quarter then ended is presented below:



|                                 |  |                    |   |  |                                           |       |                                             |     |                                      |   |       
|-------------------------------- |  | ------------------ | - |  | ----------------------------------------- | ----- | ------------------------------------------- | --- | ------------------------------------ | - | ------
|                                 |  | Options (in 000s) |   |  | Weighted Average Exercise Price Per Share |       | Weighted Average Remaining Contractual Term |     | Aggregate Intrinsic Value (in 000s)
|Outstanding at December 31, 2005 |  | 6,997              |   |  | $                                         | 58.11 |                                             |     |                                      |   |       
|Granted                          |  | 147                |   |  | $                                         | 72.58 |                                             |     |                                      |   |       
|Exercised                        |  | (171               | ) |  | $                                         | 43.52 |                                             |     |                                      |   |       
|Cancelled                        |  | (193               | ) |  | $                                         | 63.21 |                                             |     |                                      |   |       
|                                 |  |                    |   |  |                                           |       |                                             |     |                                      |   |       
|Outstanding at March 31, 2006    |  | 6,780              |   |  | $                                         | 58.55 |                                             | 7.5 |                                      | $ | 78,243
|                                 |  |                    |   |  |                                           |       |                                             |     |                                      |   |       
|Exercisable at March 31, 2006    |  | 3,133              |   |  | $                                         | 53.56 |                                             | 6.4 |                                      | $ | 51,898
|                                 |  |                    |   |  |                                           |       |                                             |     |                                      |   |       

Restricted stock units represent a right to receive shares of common stock at a future date
determined in accordance with the participants award agreement. There is no exercise price and no monetary payment is required for receipt of restricted stock units or the shares issued in settlement of the award. Instead, consideration is
furnished in the form of the participants services to the Company. Restricted stock units generally vest over three to four years. Compensation cost for these awards is based on the estimated fair value on the date of grant and recognized as
compensation expense on a straight-line basis over the requisite service period. Pre-vesting forfeitures were estimated to be approximately 0% for the three months ended March 31, 2006. For the three months ended March 31, 2006, the
Company recognized $1.3 million in share-based compensation cost related to these restricted stock unit awards. At March 31, 2006, there was $10.4 million remaining in unrecognized compensation cost related to these awards, which is expected to
be recognized over a weighted average period of 2.5 years.

The weighted average grant date fair value of restricted stock units granted
during the three months ended March 31, 2006 was $73.05. A summary of restricted stock activity as of March 31, 2006 and changes during the quarter then ended is presented below:



|                                 |  |                                 |   |  |                                                      |  |                                      |       
|-------------------------------- |  | ------------------------------- | - |  | ---------------------------------------------------- |  | ------------------------------------ | ------
|                                 |  | RestrictedStockUnits (in 000s) |   |  | Weighted Average Remaining Contractual Term in Years |  | Aggregate Intrinsic Value (in 000s)
|Outstanding at December 31, 2005 |  | 224                             |   |  |                                                      |  |                                      |       
|Granted                          |  | 15                              |   |  |                                                      |  |                                      |       
|Exercised                        |  |                                |   |  |                                                      |  |                                      |       
|Cancelled                        |  | (1                              | ) |  |                                                      |  |                                      |       
|                                 |  |                                 |   |  |                                                      |  |                                      |       
|Outstanding at March 31, 2006    |  | 238                             |   |  | 8.2                                                  |  | $                                    | 16,697
|                                 |  |                                 |   |  |                                                      |  |                                      |       
|Exercisable at March 31, 2006    |  | 8                               |   |  | 9.1                                                  |  | $                                    | 592   
|                                 |  |                                 |   |  |                                                      |  |                                      |       



8



---

During 2004 and 2003, the Company issued 20,000 and 155,000 shares of restricted stock awards,
respectively, with a weighted average grant date fair value of $72.77 for issuances during 2004 and $49.34 for issuances during 2003 to certain executive officers and key employees. The awards generally vest over four years. Compensation cost for
these restricted stock awards is based on the estimated fair value on the date of grant and recognized as compensation expense on a straight-line basis over the requisite service period. Pre-vesting forfeitures were estimated to be approximately 0%
for the three months ended March 31, 2006. For the three months ended March 31, 2006, the Company recognized $0.5 million in share-based compensation cost related to these restricted stock awards. At March 31, 2006, there was $2.8
million remaining in unrecognized compensation cost related to these awards, which is expected to be recognized over a weighted average period of 1.5 years.



|                               |  |                                   |   |  |                                       |      
|------------------------------ |  | --------------------------------- | - |  | ------------------------------------- | -----
|                               |  | RestrictedStock Awards (in 000s) |   |  | Weighted Average Grant DateFair
Value
|Nonvested at December 31, 2005 |  | 97                                |   |  | $                                     | 61.37
|Granted                        |  |                                  |   |  |                                       |     
|Vested                         |  | (10                               | ) |  | $                                     | 72.77
|Cancelled                      |  | (10                               | ) |  | $                                     | 58.70
|                               |  |                                   |   |  |                                       |      
|Nonvested at March 31, 2006    |  | 77                                |   |  | $                                     | 51.03
|                               |  |                                   |   |  |                                       |      

Pro Forma Information under FAS 123 for Periods Prior to Fiscal 2006

Prior to adopting the provisions of SFAS 123R, the Company accounted for its employee stock option plans and employee stock purchase plan under the
recognition and measurement principles of APB 25 and the disclosure only provisions of SFAS 123. Accordingly, no compensation cost has been recognized for the fixed stock option plans or stock purchase plan under the fair value recognition
provisions of SFAS 123. The following table illustrates the effect on net income and earnings per share if the Company had applied the fair value recognition provisions of SFAS 123 to stock-based employee compensation.



|                                                                                                                                      |  |                                   |        |  
|------------------------------------------------------------------------------------------------------------------------------------- |  | --------------------------------- | ------ | -
|(in thousands, except per share data)                                                                                                 |  | Three Months Ended March 31, 2005 |       
|Net income, as reported                                                                                                               |  | $                                 | 47,074 |  
|Add: Stock-based compensation expense included in reported net income, net of related tax effects                                     |  |                                   | 1,047  |  
|Deduct: Stock-based employee compensation expense determined under fair value based method for all awards, net of related tax
effects |  |                                   | (9,943 | )
|                                                                                                                                      |  |                                   |        |  
|Pro forma net income                                                                                                                  |  | $                                 | 38,178 |  
|                                                                                                                                      |  |                                   |        |  
|Basic earnings per share:                                                                                                             |  |                                   |        |  
|As reported                                                                                                                           |  | $                                 | 0.91   |  
|                                                                                                                                      |  |                                   |        |  
|Pro forma                                                                                                                             |  | $                                 | 0.74   |  
|                                                                                                                                      |  |                                   |        |  
|Diluted earnings per share:                                                                                                           |  |                                   |        |  
|As reported                                                                                                                           |  | $                                 | 0.82   |  
|                                                                                                                                      |  |                                   |        |  
|Pro forma                                                                                                                             |  | $                                 | 0.67   |  
|                                                                                                                                      |  |                                   |        |  

The fair value of each option grant and purchase right was estimated on the date of grant using the present value
pricing method as described in SFAS 123. The underlying assumptions used to estimate the fair values of options and purchase rights granted during the three months ended March 31, 2005 were as follows:



|                                                          |  |         |         |   |                |   |         |  
|--------------------------------------------------------- |  | ------- | ------- | - | -------------- | - | ------- | -
|                                                          |  | Options |         |   | PurchaseRights |  
|Weighted average risk free interest rate                  |  |         | 3.41    | % |                |   | 2.98    | %
|Expected term                                             |  |         | 4.6 yrs |   |                |   | 1.1 yrs |  
|Expected stock price volatility                           |  |         | 40      | % |                |   | 40      | %
|Expected dividend yield                                   |  |         |        |   |                |   |        |  
|Weighted average fair value of share-based awards granted |  | $       | 26.16   |   |                | $ | 22.04   |  



9



---

Comprehensive Income

Total comprehensive income consists of the following:



|                                                                           |  |                                      |        |   |      |   |         |  
|-------------------------------------------------------------------------- |  | ------------------------------------ | ------ | - | ---- | - | ------- | -
|(in thousands)                                                             |  | For the Three Months Ended March 31, |       
|                                                                           |  | 2006                                 |        |   | 2005 |  
|Net income, as reported                                                    |  | $                                    | 19,218 |   |      | $ | 47,074  |  
|Unrealized gain (loss) on investments, net of related tax effects          |  |                                      | 1,167  |   |      |   | (1,271  | )
|Unrealized gain (loss) on hedging transactions, net of related tax effects |  |                                      | (215   | ) |      |   | 5,163   |  
|Minimum pension liability adjustment, net of related tax effects           |  |                                      |       |   |      |   | 2       |  
|Foreign currency translation adjustment                                    |  |                                      | 6,324  |   |      |   | (24,437 | )
|                                                                           |  |                                      |        |   |      |   |         |  
|Total comprehensive income                                                 |  | $                                    | 26,494 |   |      | $ | 26,531  |  
|                                                                           |  |                                      |        |   |      |   |         |  

Recent Accounting Pronouncements

In February 2006, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards No. 155, Accounting for
Certain Hybrid Financial Instruments, (SFAS 155) which amends Statement of Financial Accounting Standards No. 133, Accounting for Derivative Instruments and Hedging Activities, (SFAS 133) and Statement of Financial Accounting
Standards No. 140, Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities, (SFAS 140). SFAS 155 simplifies the accounting for certain derivatives embedded in other financial instruments by
allowing them to be accounted for as a whole (eliminating the need to bifurcate the derivative from its host) if the holder elects to account for the whole instrument on a fair value basis. SFAS 155 also clarifies and amends certain other provisions
of SFAS 133 and SFAS 140. SFAS 155 is effective for all financial instruments acquired, issued or subject to a remeasurement event occurring in fiscal year beginning after September 15, 2006. Earlier adoption is permitted, provided the Company
has not yet issued financial statements, including for interim periods, for that fiscal year. The Company does not believe that the adoption of this statement will have a material impact on its financial condition, consolidated results of operations
or cash flows.

In May 2005, the FASB issued Statement of Financial Accounting Standards No. 154, Accounting for Changes and
Error Corrections, (SFAS 154). SFAS 154 requires retrospective application to prior-period financial statements of changes in accounting principles, unless it is impracticable to do so or a new accounting pronouncement provides specific
transition provisions to the contrary. SFAS 154 also provides that a change in method of depreciating or amortizing a long-lived nonfinancial asset be accounted for as a change in estimate that was effected by a change in accounting principle and
redefines restatement as the revising of previously issued financial statements to reflect the correction of an error. The Company adopted the provisions of SFAS 154 on January 1, 2006.

Reclassifications

Certain reclassifications
of prior year amounts have been made to conform with the current year presentation.



10



---

|2. | Composition of Certain Financial Statement Items
|-- | ------------------------------------------------

Investments

Investments consisted of the following:



|                                     |  |                |         |                   |   |        
|------------------------------------ |  | -------------- | ------- | ----------------- | - | -------
|(in thousands)                       |  | March 31, 2006 |         | December 31, 2005
|                                     |  | (Unaudited)    |         |                  
|Short-term                           |  |                |         |                   |   |        
|Corporate obligations                |  | $              | 93,819  |                   | $ | 132,791
|U.S. Treasury and Agency obligations |  |                | 130,349 |                   |   | 156,608
|Municipal obligations                |  |                |        |                   |   | 3,443  
|Commercial paper                     |  |                | 6,824   |                   |   | 17,668 
|                                     |  |                |         |                   |   |        
|Total short-term investments         |  | $              | 230,992 |                   | $ | 310,510
|                                     |  |                |         |                   |   |        
|Long-term                            |  |                |         |                   |   |        
|Corporate obligations                |  | $              |        |                   | $ | 171    
|U.S. Treasury and Agency obligations |  |                | 12      |                   |   | 16     
|Equity securities                    |  |                | 15      |                   |   |       
|                                     |  |                |         |                   |   |        
|Total long-term investments          |  | $              | 27      |                   | $ | 187    
|                                     |  |                |         |                   |   |        
|Total investments                    |  | $              | 231,019 |                   | $ | 310,697
|                                     |  |                |         |                   |   |        

Inventories

Inventories consisted of the following:



|                                                        |  |                |         |                   |   |        
|------------------------------------------------------- |  | -------------- | ------- | ----------------- | - | -------
|(in thousands)                                          |  | March 31, 2006 |         | December 31, 2005
|                                                        |  | (Unaudited)    |         |                  
|Raw materials and components                            |  | $              | 28,636  |                   | $ | 20,941 
|                                                        |  |                |         |                   |   |        
|Work in process (materials, labor and overhead)         |  |                | 20,038  |                   |   | 17,982 
|Adjustment to write up acquired inventory to fair value |  |                | 1,475   |                   |   | 3,657  
|                                                        |  |                |         |                   |   |        
|Total work in process                                   |  |                | 21,513  |                   |   | 21,639 
|                                                        |  |                |         |                   |   |        
|Finished goods (materials, labor and overhead)          |  |                | 94,919  |                   |   | 93,442 
|Adjustment to write up acquired inventory to fair value |  |                | 718     |                   |   | 731    
|                                                        |  |                |         |                   |   |        
|Total finished goods                                    |  |                | 95,637  |                   |   | 94,173 
|                                                        |  |                |         |                   |   |        
|                                                        |  | $              | 145,786 |                   | $ | 136,753
|                                                        |  |                |         |                   |   |        

Property and Equipment

Property and equipment consisted of the following:



|                                          |  |                                |  |               |          |   |                  |   |          |  
|----------------------------------------- |  | ------------------------------ |  | ------------- | -------- | - | ---------------- | - | -------- | -
|(in thousands)                            |  | EstimatedUseful Life(in years) |  | March 31,2006 |          |   | December 31,2005 |  
|                                          |  |                                |  | (Unaudited)   |          |   |                  |  
|Land                                      |  |                               |  | $             | 23,311   |   |                  | $ | 23,305   |  
|Building and improvements                 |  | 1-50                           |  |               | 170,231  |   |                  |   | 163,149  |  
|Machinery and equipment                   |  | 1-10                           |  |               | 206,811  |   |                  |   | 201,836  |  
|Construction in process                   |  |                               |  |               | 43,155   |   |                  |   | 43,920   |  
|                                          |  |                                |  |               |          |   |                  |   |          |  
|                                          |  |                                |  |               | 443,508  |   |                  |   | 432,210  |  
|Accumulated depreciation and amortization |  |                                |  |               | (162,977 | ) |                  |   | (153,763 | )
|                                          |  |                                |  |               |          |   |                  |   |          |  
|                                          |  |                                |  | $             | 280,531  |   |                  | $ | 278,447  |  
|                                          |  |                                |  |               |          |   |                  |   |          |  

Goodwill and Other Intangible Assets

The $16.2 million increase in goodwill on the condensed consolidated balance sheets from December 31, 2005 to March 31, 2006 was the result of a
$10.8 million in adjustment for prior year acquisitions and $5.4 million in foreign currency translation. The adjustments were primarily related to additional payments made for the achievement of certain development



11



---

milestones and additional reserves for certain contingent obligations and the termination and relocation of certain employees to other sites.

Intangible assets consisted of the following:



|                                               |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  
|---------------------------------------------- |  | -------------------------- |  | ------------------- | ----------------- | ----------------------- | - | -------- | ------------------- |  | ------------------- |  | ----------------------- | ------- |  | - | -------- | -
|                                               |  | March 31, 2006 (Unaudited) |  |                     | December 31, 2005 |                        
|(in thousands)                                 |  | WeightedAverageLife        |  | GrossCarryingAmount |                   | AccumulatedAmortization |   |          | WeightedAverageLife |  | GrossCarryingAmount |  | AccumulatedAmortization |        
|Amortized intangible assets:                   |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  
|Purchased technology                           |  | 7 years                    |  | $                   | 747,667           |                         | $ | (400,876 | )                   |  | 7 years             |  | $                       | 740,374 |  | $ | (376,187 | )
|Purchased tradenames and trademarks            |  | 7 years                    |  |                     | 81,083            |                         |   | (46,801  | )                   |  | 7 years             |  |                         | 88,258  |  |   | (44,927  | )
|Purchased customer base                        |  | 10 years                   |  |                     | 78,212            |                         |   | (30,217  | )                   |  | 10 years            |  |                         | 78,205  |  |   | (27,679  | )
|Other intellectual properties                  |  | 3 years                    |  |                     | 47,749            |                         |   | (15,679  | )                   |  | 3 years             |  |                         | 39,595  |  |   | (14,094  | )
|                                               |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  
|                                               |  |                            |  | $                   | 954,711           |                         | $ | (493,573 | )                   |  |                     |  | $                       | 946,432 |  | $ | (462,887 | )
|                                               |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  
|Intangible assets not subject to amortization: |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  
|Purchased tradenames and trademarks            |  |                            |  | $                   | 7,451             |                         |   |          |                     |  |                     |  | $                       | 7,451   |  |   |          |  
|                                               |  |                            |  |                     |                   |                         |   |          |                     |  |                     |  |                         |         |  |   |          |  

Amortization expense related to intangible assets for the three months ended March 31, 2006
and 2005 was $30.5 million and $26.9 million, respectively. Estimated aggregate amortization expense is expected to be $109.8 million for the remainder of fiscal year 2006. Estimated aggregate amortization expense for fiscal years 2007, 2008, 2009
and 2010 is $106.4 million, $70.7 million, $60.2 million and $45.9 million, respectively.



|3. | Other income (expense), net
|-- | ---------------------------

Other income
(expense), net for the three months ended March 31, 2006 and 2005 consisted of the following:



|                                           |  |      |     |      |   |        |  
|------------------------------------------ |  | ---- | --- | ---- | - | ------ | -
|(in thousands)                             |  | 2006 |     | 2005 |  
|Gain on forward contract                   |  | $    |    |      | $ | 21,003 |  
|Sale of equity investment                  |  |      |    |      |   | 2,796  |  
|Foreign currency gain on intercompany loan |  |      |    |      |   | 2,200  |  
|Gain on early retirement of debt           |  |      | 269 |      |   |       |  
|Other                                      |  |      | 185 |      |   | (326   | )
|                                           |  |      |     |      |   |        |  
|                                           |  | $    | 454 |      | $ | 25,673 |  
|                                           |  |      |     |      |   |        |  



|4. | Business Combinations
|-- | ---------------------

Dynal Acquisition

On April 1, 2005, the Company acquired all of the outstanding shares of common stock and stock options of Dynal Biotech Holding AS (Dynal). Based
in Oslo, Norway, Dynal is the industry leader in magnetic bead technologies used in cell separation and purification, cell stimulation, protein research, nucleic acid research and microbiology. The primary reason for the acquisition was to leverage
Dynals technologies across the Companys broad product portfolio. This combination has applications in numerous areas of research, including stem cell and cell therapy applications, as well as in products that support molecular
diagnostics, and other key areas of research. The Company has continued Dynals operations as part of its BioDiscovery business segment.

The results of operations have been included in the accompanying condensed consolidated financial statements from the date of acquisition. The total cost of the acquisition was as follows:



|                                                        |  |   |        
|------------------------------------------------------- |  | - | -------
|(in thousands)                                          |  |  
|Cash paid for common stock                              |  | $ | 347,308
|Cash paid to extinguish debt as a result of acquisition |  |   | 53,057 
|Direct costs                                            |  |   | 2,194  
|                                                        |  |   |        
|Total purchase price                                    |  | $ | 402,559
|                                                        |  |   |        



12



---

As of March 31, 2006, the final purchase price allocation is shown below:



|                                                                           |  |   |        
|-------------------------------------------------------------------------- |  | - | -------
|(in thousands)                                                             |  |  
|Fair value of net tangible assets acquired                                 |  | $ | 23,871 
|Fair value of purchased in-process research and development costs acquired |  |   | 12,800 
|Fair value of identifiable intangible assets acquired                      |  |   | 104,100
|Goodwill                                                                   |  |   | 261,788
|                                                                           |  |   |        
|                                                                           |  | $ | 402,559
|                                                                           |  |   |        

Purchased intangibles are being amortized over a weighted average life of 8 years. An established
client list, a history of operating margins and profitability, a strong scientific employee base and operations in an attractive market niche were among the factors that contributed to a purchase price resulting in the recognition of goodwill. The
Company believes none of the intangible assets and goodwill recognized will be deductible for federal income tax purposes.

As part
of the integration of the business, the Company has established a reserve for the termination and relocation of certain employees to other sites. At March 31, 2006, the Company had $1.3 million remaining in accrued expenses and other current
liabilities in the Condensed Consolidated Balance Sheets related to this integration. For the three months ended March 31, 2006, the Company did not make any payments related to severance charges that had been accrued for acquisition and
business integration costs.

Business Consolidation Costs

The Company continues to integrate recent acquisitions into its operations and recorded approximately $2.1 million for the three months ended
March 31, 2006 related to these efforts. These expenses relate primarily to the severance of approximately 30 employees and other costs associated with consolidation.



|5. | Segment Information
|-- | -------------------

The Company has two reportable
segments: BioDiscovery and BioProduction.

The BioDiscovery product segment includes functional genomics, cell biology and drug discovery
product lines. Functional genomics encompasses products from the initial cloning and manipulation of DNA, to examining RNA levels and regulating gene expression in cells, to capturing, separating and analyzing proteins. These include the research
tools used in reagent and kit form that simplify and improve gene acquisition, gene cloning, gene expression, and gene analysis techniques. This segment also includes a full range of enzymes, nucleic acids, other biochemicals and reagents. These
biologics are manufactured to the highest research standards and are matched in a gene specific, validated manner (gene, orf, rnai, protein, antibodies, etc.) to ensure researchers the highest purity and scientific relevance for their
experimentation. The Company also offers software that enables more efficient, accelerated analysis and interpretation of genomic, proteomic and other biomolecular data for application in pharmaceutical, therapeutic and diagnostic development.

The BioProduction product segment includes all of our Gibco cell culture products and BioReliance services. Products include sera, cell
and tissue culture media, reagents used in both life sciences research and in processes to grow cells in the laboratory, and to produce pharmaceuticals and other materials made through cultured cells. BioProduction services include testing to ensure
that biologics are free of disease-causing agents or do not cause adverse effects, characterization of products chemical structures, development of formulations for long-term stability, and validation of purification processes under regulatory
guidelines. The Company also manufactures biologics on behalf of clients both for use in clinical trials and for the worldwide commercial market.

The Company has no intersegment revenues that are material to the overall condensed consolidated financial statements. In addition, the Company does not currently segregate assets by segment as a majority of the Companys total assets
are shared or considered non-segment assets. As a result, the Company has determined it is not useful to assign its shared assets to individual segments.



13



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Segment information is as follows:



|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|-------------------------------------------------------------------------------------------------------- |  | ------------ | ------- | - | ------------- | - | ------- | --------------------------- |  | - | ------- | - |  | - | ------- | -
|(dollars in thousands)                                                                                   |  | BioDiscovery |         |   | BioProduction |   |         | Corporate andUnallocated(1) |  |   | Total   |  
|Three Months Ended March 31, 2006                                                                        |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Revenues from external customers                                                                         |  | $            | 203,459 |   |               | $ | 105,545 |                             |  | $ |        |   |  | $ | 309,004 |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Gross profit                                                                                             |  |              | 141,084 |   |               |   | 51,530  |                             |  |   | (2,957  | ) |  |   | 189,657 |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Gross margin                                                                                             |  |              | 69      | % |               |   | 49      | %                           |  |   |         |   |  |   | 61      | %
|Selling and administrative                                                                               |  |              | 65,856  |   |               |   | 25,233  |                             |  |   | 8,524   |   |  |   | 99,613  |  
|Research and development                                                                                 |  |              | 24,355  |   |               |   | 3,497   |                             |  |   | 1,048   |   |  |   | 28,900  |  
|Purchased intangibles amortization, in-process research and development and business consolidation costs |  |              |        |   |               |   |        |                             |  |   | 32,083  |   |  |   | 32,083  |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Operating income (loss)                                                                                  |  | $            | 50,873  |   |               | $ | 22,800  |                             |  | $ | (44,612 | ) |  | $ | 29,061  |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Operating margin                                                                                         |  |              | 25      | % |               |   | 22      | %                           |  |   |         |   |  |   | 9       | %
|Three Months Ended March 31, 2005                                                                        |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Revenues from external customers                                                                         |  | $            | 162,351 |   |               | $ | 114,730 |                             |  | $ |        |   |  | $ | 277,081 |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Gross profit                                                                                             |  |              | 116,155 |   |               |   | 55,198  |                             |  |   | (694    | ) |  |   | 170,659 |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Gross margin                                                                                             |  |              | 72      | % |               |   | 48      | %                           |  |   |         |   |  |   | 62      | %
|Selling and administrative                                                                               |  |              | 52,975  |   |               |   | 25,439  |                             |  |   | 70      |   |  |   | 78,484  |  
|Research and development                                                                                 |  |              | 18,157  |   |               |   | 2,865   |                             |  |   | 219     |   |  |   | 21,241  |  
|Purchased intangibles amortization and in-process research and development                               |  |              |        |   |               |   |        |                             |  |   | 27,101  |   |  |   | 27,101  |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Operating income (loss)                                                                                  |  | $            | 45,023  |   |               | $ | 26,894  |                             |  | $ | (28,084 | ) |  | $ | 43,833  |  
|                                                                                                         |  |              |         |   |               |   |         |                             |  |   |         |   |  |   |         |  
|Operating margin                                                                                         |  |              | 28      | % |               |   | 23      | %                           |  |   |         |   |  |   | 16      | %

---

|(1) | Unallocated items for the three months ended March 31, 2006 and 2005 include non-cash charges for purchase accounting inventory revaluations of $2.2 million and
$0.6 million, amortization of purchased intangibles of $30.0 million and $25.9 million, in-process research and development of $0 million and $1.2 million, amortization of deferred compensation of $0.2 million and $0.4 million, business
consolidation costs of $2.1 million and $0 million, and expenses related to share-based payments as a result of the adoption of Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based Payments, of $10.1
million and $0 million, respectively. These items are not allocated by management for purposes of analyzing the operations since they are principally non-cash or other costs resulting primarily from business restructuring or purchase accounting that
are separate from ongoing operations.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|6. | Long-Term Debt
|-- | --------------

Long-term debt consists of the
following:



|                                                          |  |                |           |   |                   |   |           |  
|--------------------------------------------------------- |  | -------------- | --------- | - | ----------------- | - | --------- | -
|(in thousands)                                            |  | March 31, 2006 |           |   | December 31, 2005 |  
|                                                          |  | (Unaudited)    |           |   |                   |  
|31/4%
Convertible Senior Notes (principal due 2025)       |  | $              | 350,000   |   |                   | $ | 350,000   |  
|11/2%
Convertible Senior Notes (principal due 2024)       |  |                | 450,000   |   |                   |   | 450,000   |  
|2% Convertible Senior Notes (principal due 2023)          |  |                | 350,000   |   |                   |   | 350,000   |  
|21/4%
Convertible Subordinated Notes (principal due 2006) |  |                | 187,831   |   |                   |   | 231,931   |  
|Capital leases                                            |  |                | 1,043     |   |                   |   | 1,086     |  
|Other                                                     |  |                | 2,773     |   |                   |   | 3,152     |  
|                                                          |  |                |           |   |                   |   |           |  
|                                                          |  |                | 1,341,647 |   |                   |   | 1,386,169 |  
|Less current portion                                      |  |                | (189,745  | ) |                   |   | (234,246  | )
|                                                          |  |                |           |   |                   |   |           |  
|                                                          |  | $              | 1,151,902 |   |                   | $ | 1,151,923 |  
|                                                          |  |                |           |   |                   |   |           |  

During the three months ended March 31, 2006, the Company repurchased $44.1 million of its
21/4% Convertible Subordinated Notes due 2006 for less than par value. The Company recorded a gain of $0.5
million on the repurchase and a loss of $0.2 million related to the write-off of unamortized deferred financing costs for the three months ended March 31, 2006.



|7. | Lines of Credit
|-- | ---------------

On January 9, 2006, the
Company completed entering into a syndicated $250 million senior secured credit facility (the Credit Facility) with Bank of America, N.A. Amounts borrowed under the Credit Facility are secured by substantially all of



14



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the assets of the Company, including equity interests in certain of the Companys subsidiaries. Additionally, the Credit Facility is guaranteed by
certain subsidiaries of the Company. Interest rates on outstanding borrowings are determined by reference to LIBOR or to an alternate base rate, with margins determined based on changes in the Companys leverage ratio. Under the terms of the
Credit Facility, the Company may request that the aggregate amount available be increased by $100 million of additional financing, subject to certain conditions having been met, including the availability of additional lender commitments. The Credit
Facility contains various representations, warranties, affirmative, negative and financial covenants, and conditions of default customary for financings of this type. The Company currently anticipates using the proceeds of the Credit Facility for
the purpose of general working capital and capital expenditures, and the Credit Facility will terminate and all amounts outstanding under it will be due and payable in full on January 6, 2011. At March 31, 2006, no amounts related to this
credit facility were outstanding.

At March 31, 2006, several of the Companys foreign subsidiaries had available bank lines of
credit denominated in local currency to meet short-term working capital requirements. The credit facilities bear interest at fixed rates, the respective banks prime rate, the London LIBOR rate, the Norwegian NIBOR rate and the Japan TIBOR rate
(a weighted average rate of 2.25% at March 31, 2006). Under these lines of credit, the U.S. dollar equivalent of these facilities totaled $11.5 million, of which $0.5 million was outstanding at March 31, 2006. There were no parent company
guarantees associated with these facilities.



|8. | Commitments and Contingencies
|-- | -----------------------------

Operating Leases

During the three months ended March 31, 2006, the Company terminated an existing operating lease and entered into a new
operating lease agreement for the same property for one of its office and manufacturing facilities. The new lease agreement expires in 2022 and provides for escalating rental payments with the option to renew extending through 2038. These
transactions resulted in an additional net increase to rent expense of $0.6 million for the remainder of fiscal 2006, $1.2 million for each of the fiscal years 2007, 2008, 2009 and 2010, and $49.6 million for fiscal years thereafter.

Letters of Credit

The Company had outstanding
letters of credit totaling $9.4 million at March 31, 2006, of which $4.8 million was to support liabilities associated with the Companys self-insured workers compensation programs and $4.6 million was to support its building lease
requirements.

Executive Employment Agreements

The Company has employment contracts with key executives that provide for the continuation of salary if terminated for reasons other than cause, as defined in those agreements. At March 31, 2006, future
employment contract commitments for such key executives were approximately $9.0 million for the remainder of fiscal year 2006 and approximately $2.4 million for fiscal year 2007.

Contingent Acquisition Obligations

Pursuant to the purchase agreements for certain prior year
acquisitions, the Company could be required to make additional contingent cash payments based on the achievement of certain operating results of the acquired companies. Payments aggregating a maximum of $78.3 million based upon certain percentages
of future gross sales of the acquired companies could be required through 2007. Additional payments of $13.3 million could be required of the Company based upon the achievement of certain development milestones through 2008. For the three months
ended March 31, 2006, $4.1 million and $17.6 million of contingent payments have been earned and paid, respectively, for research and development milestones. No contingent payments have been earned for operating results to date.

In addition, the purchase agreement for one of the prior year acquisitions may require the Company to make additional contingent cash payments based on
percentages of future gross sales of the acquired company through 2009. The purchase agreement does not limit the payment to a maximum amount. The Company will account for any such contingent payments as an addition to the purchase price of the
acquired company. No contingent payments have been earned as of March 31, 2006.



15



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Environmental Liabilities

The Company assumed certain environmental exposures as a result of the merger with Dexter Corporation in 2000 and recorded reserves to cover estimated environmental clean-up costs. The environmental reserves, which
are not discounted, were $7.7 million at March 31, 2006, and include current reserves of $0.7 million, which are estimated to be paid during this fiscal year, and long-term reserves of $7.0 million. In addition, the Company has an insurance
policy to cover these assumed environmental exposures. Based upon currently available information, the Company believes that it has adequately provided for these environmental exposures and that the outcome of these matters will not have a material
adverse effect on its consolidated results of operations.

Intellectual Properties

The Company is involved in various claims and legal proceedings of a nature considered normal to its business, including protection of its owned and
licensed intellectual property. The Company accrues for such contingencies when it is probable that a liability is incurred and the amount can be reasonably estimated. These accruals are adjusted periodically as assessments change or additional
information becomes available. Specific royalty liabilities related to acquired businesses have been recorded on the condensed consolidated financial statements at March 31, 2006.

Litigation

The Company is subject to potential liabilities under government regulations and
various claims and legal actions that are pending or may be asserted. These matters have arisen in the ordinary course and conduct of the Companys business, as well as through acquisitions, and some are expected to be covered, at least partly,
by insurance. Claim estimates that are probable and can be reasonably estimated are reflected as liabilities of the Company. The ultimate resolution of these matters is subject to many uncertainties. It is reasonably possible that some of the
matters that are pending or may be asserted could be decided unfavorably to the Company. Although the amount of liability at March 31, 2006 with respect to these matters cannot be ascertained, the Company believes that any resulting liability
should not materially affect its condensed consolidated financial statements.



|9. | Pension Plans and Postretirement Health and Benefit Program
|-- | -----------------------------------------------------------

The Company has several defined benefit pension plans covering its U.S. employees and employees in several foreign countries. The Company also administers the Dexter Postretirement Health and Benefit Program, which provides benefits to
certain participants who are not employees of the Company but were employees of Dexter Corporation prior to the sale of its businesses and its merger with the Company.

The components of net periodic pension cost for the Companys pension plans and postretirement health and benefit program for the three months ended March 31, 2006 and 2005 were as follows:



|                                    |  |                |       |   |      |   |        |  
|----------------------------------- |  | -------------- | ----- | - | ---- | - | ------ | -
|                                    |  | Domestic Plans |      
|(in thousands)                      |  | 2006           |       |   | 2005 |  
|Service cost                        |  | $              | 20    |   |      | $ |       |  
|Interest cost                       |  |                | 821   |   |      |   | 827    |  
|Expected return on plan assets      |  |                | (894  | ) |      |   | (1,331 | )
|Amortization of prior service cost  |  |                | 60    |   |      |   | 60     |  
|Amortization of actuarial loss      |  |                | 430   |   |      |   | 405    |  
|                                    |  |                |       |   |      |   |        |  
|Net periodic pension cost (benefit) |  | $              | 437   |   |      | $ | (39    | )
|                                    |  |                |       |   |      |   |        |  
|                                    | 
|(in thousands)                      |  | Foreign Plans  |      
|                                    |  | 2006           |       |   | 2005 |  
|Service cost                        |  | $              | 1,197 |   |      | $ | 542    |  
|Interest cost                       |  |                | 680   |   |      |   | 320    |  
|Expected return on plan assets      |  |                | (604  | ) |      |   | (318   | )
|Amortization of actuarial loss      |  |                | 148   |   |      |   | 22     |  
|                                    |  |                |       |   |      |   |        |  
|Net periodic pension cost           |  | $              | 1,421 |   |      | $ | 566    |  
|                                    |  |                |       |   |      |   |        |  



|10. | Income Taxes
|--- | ------------

Income taxes are determined using an
estimated annual effective tax rate. The provision for income taxes is less than the 35% U.S. federal statutory rate primarily due to lower tax rates in certain non-U.S. jurisdictions, export and domestic production incentives, and
research and development tax credits available from various state jurisdictions in the United States. The statutory provisions allowing the Federal research and development tax credit in the United States have expired but are
expected to be renewed. The inability to utilize the Federal research and development credits had a 1.5% negative impact on our effective tax rate.



16



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|ITEM 2. | MANAGEMENTS DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND FINANCIAL CONDITION
|------- | -------------------------------------------------------------------------------------

The following discussion and analysis of financial condition and results of operations should be read in conjunction with the Unaudited Condensed
Consolidated Financial Statements and Notes thereto included elsewhere in this report and the Consolidated Financial Statements and Notes thereto included in our annual report on Form 10-K.

Forward-looking Statements

Any statements in this
Quarterly Report on Form 10-Q about our expectations, beliefs, plans, objectives, prospects, financial condition, assumptions or future events or performance are not historical facts and are forward-looking statements as that term is
defined under the Federal Securities Laws. These statements are often, but not always, made through the use of words or phrases such as believe, anticipate, should, intend, plan,
will, expects, estimates, projects, positioned, strategy, outlook, and similar words. You should read statements that contain these types of words carefully. Such
forward-looking statements are subject to a number of risks, uncertainties and other factors that could cause actual results to differ materially from what is expressed or implied in such forward-looking statements. There may be events in the future
that we are not able to predict accurately or over which we have no control. Potential risks and uncertainties include, but are not limited to, those discussed below under Risk Factors That May Affect Future Results and elsewhere in this
Quarterly Report as well as other risks and uncertainties detailed in our Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 1, 2006. We do not undertake any obligation to release publicly any revisions to
such forward-looking statements to reflect events or uncertainties after the date hereof or to reflect the occurrence of unanticipated events.

Overview

Revenues for the three months ended March 31, 2006 were $309.0 million, with net income of $19.2 million. In March 2006, we
acquired Xcytes T cell expansion technology, known as the Xcellerate Process. The acquired assets included intellectual property, clinical data generated by Xcyte in the course of six clinical trials of its lead product,
Xcellerated T Cells, as well as raw materials and equipment. This acquisition represents a cornerstone in a broader effort to substantially increase our offering to customers working within immunology.

Our Business and Operating Segments

We are a leading
developer, manufacturer and marketer of research tools in reagent, kit and high throughput application forms to customers engaged in life sciences research, drug discovery, diagnostics and the commercial manufacture of biological products.
Additionally we are a leading supplier of sera, cell and tissue culture media and reagents used in life sciences research, as well as in processes to grow cells in the laboratory and produce pharmaceuticals and other high valued proteins.

We conduct our business through two principal segments:



| |  |  | BioDiscovery.Our BioDiscovery product segment includes our functional genomics, cell biology and drug discovery product lines. Functional genomics encompasses products from
the initial cloning and manipulation of DNA, to examining RNA levels and regulating gene expression in cells, to capturing, separating and analyzing proteins. These include the research tools used in reagent and kit form that simplify and improve
gene acquisition, gene cloning, gene expression, and gene analysis techniques. This segment also includes a full range of enzymes, nucleic acids, other biochemicals and reagents. These biologics are manufactured to the highest research standards and
are matched in a gene specific, validated manner (gene, orf, rnai, protein, antibodies, etc.) to ensure researchers the highest purity and scientific relevance for their experimentation. We also offer software through this segment that enables more
efficient, accelerated analysis and interpretation of genomic, proteomic and other biomolecular data for application in pharmaceutical, therapeutic and diagnostic development.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | BioProduction. Our BioProduction product segment includes all of our Gibco cell culture products and BioReliance services. Products include sera, cell and tissue culture
media, reagents used in both life sciences research and in processes to grow cells in the laboratory, and to produce pharmaceuticals and other materials made through cultured cells. BioProduction services include testing to ensure that biologics are
free of disease-causing agents or do not cause adverse effects, characterization of products chemical structures, development of formulations for long-term stability, and validation of purification processes under regulatory guidelines. We
also manufacture biologics on behalf of clients both for use in clinical trials and for the worldwide commercial market.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



17



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Our BioDiscovery and BioProduction products are used for research purposes, and their use by our
customers generally is not regulated by the United States Food and Drug Administration (FDA) or by any comparable international organization, with several limited exceptions. Some of our BioProduction products and manufacturing sites, including some
of our BioReliance subsidiarys sites, are subject to FDA regulation and oversight and are required to comply with the Quality System Regulations. Additionally, some of these same sites and products are intended to comply with certain voluntary
quality programs such as ISO 9001.

Except for our oligonucleotide, genomics services, biologics testing, specialized manufacturing, and
cell culture production businesses, which are make-to-order businesses, we principally manufacture products for inventory and ship products shortly after the receipt of orders, and anticipate that we will continue to do so in the future. We do not
currently have a significant backlog and do not anticipate building a material backlog in the future. In addition, we rely on third-party manufacturers to supply many of our raw materials, product components, and in some cases, entire products.

Outlook

In 2006, we expect continued
overall revenue growth of 9% to 13%. We believe gross margins will be affected by sales mix and volume, the addition of acquired businesses, competitive conditions, royalty payments on licensed technologies, the cost of raw materials, changes in
average selling prices, our ability to make productivity improvements, and foreign currency rates. We expect to see continued productivity gains in our sales and marketing expenditures as we add product specialists to support our existing customer
account managers, allowing us to increase the effectiveness of our direct selling organization as we expand our product portfolio. We will continue to implement programs and actions to improve our efficiency in the general and administrative area.
These programs will focus in the areas of process improvement and automation. We expect over time that these actions will reduce our general and administrative expenses as a percent of revenues. We expect to continue to invest in research and
development efforts as we expand our capabilities to accelerate innovation and ramp up research and development of recently acquired businesses. You should also refer to the Risk Factors section included in this Form 10-Q for further discussion of
risks related to our business.

CRITICAL ACCOUNTING POLICIES

Other than the adoption of Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based Payments, as discussed below, there were no significant changes in critical accounting
policies or estimates from those at December 31, 2005. For additional information on the recent accounting pronouncements impacting our business, see Note 1 of the Notes to Condensed Consolidated Financial Statements included in Item 1.

Share-Based Compensation.Under our 2004 Equity Incentive Plan (the 2004 Plan), we grant share-based awards to eligible employees and
directors to purchase shares of our common stock. In addition, we have a qualified employee stock purchase plan in which eligible employees may elect to withhold up to 15% of their compensation to purchase shares of our common stock on a quarterly
basis at a discounted price equal to 85% of the lower of the employees offering price or the closing price of the stock on the date of purchase. The benefits provided by these plans qualify as share-based compensation under the provisions of
Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based Payment (SFAS 123R), which requires us to recognize compensation expense based on their estimated fair values determined on the date of grant for all
share-based awards granted, modified or cancelled as of January 1, 2006 (the effective date). Prior to the effective date, we did not recognize any compensation cost in our income statements for share-based awards granted with an option price
equal to the fair market value of the our common stock on the date of grant or employee stock purchase rights as we accounted for them under the recognition and measurement principles of APB Opinion No. 25, Accounting for Stock Issued to
Employees(APB 25) and its related interpretations and adopted the disclosure only provisions of Statement of Financial Accounting Standards No. 123, Stock-Based Compensation (SFAS 123).

We adopted SFAS 123R on January 1, 2006 using the modified-prospective-transition method. Under this method, share-based compensation cost is
measured at the grant date based on the estimated fair value of the award and is recognized as expense over the employees requisite service period. Prior periods are not revised for comparative purposes. For the three months ended
March 31, 2006, we recognized $10.3 million, $1.3 million and $0.5 million of compensation expense for employee stock options (including stock options assumed in business combinations) and purchase rights, restricted stock units and restricted
stock awards, respectively. At March 31, 2006, there were $60.4 million, $10.4 million and $2.8 million remaining in unrecognized compensation cost related to employee stock options, restricted stock units and restricted stock awards,
respectively, which are expected to be recognized over a weighted average period of 2.0 years, 2.5 years and 1.5 years, respectively.

We
estimate the fair value of share-based awards on the date of grant using the Black-Scholes option-pricing method (Black-Scholes method), which was also used for the pro forma information required to be disclosed under FAS 123. The determination of
fair value of share-based awards using an option-pricing model requires the use of certain estimates and



18



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assumptions that affect the reported amount of share-based compensation cost recognized in our Condensed Consolidated Statements of Income. Among these
include estimates of the expected term of share-based awards, expected volatility of our stock price, expected dividends and the risk-free interest rate. These estimates and assumptions are highly subjective and may result in materially different
amounts should circumstances change and we employ different assumptions in our application of FAS 123R in future periods.

For share-based
awards issued during the three months ended March 31, 2006, we estimated the expected term by considering various factors including the vesting period of options granted, employees historical exercise and post-employment termination
behavior and aggregation by homogeneous employee groups. Our estimated volatility was derived using a combination of our historical stock price volatility and the implied volatility of market-traded options of our common stock with terms of up to
approximately two years. Our decision to use a combination of historical and implied volatility was based upon the availability of actively traded options of our common stock and our assessment that such a combination was more representative of
future expected stock price trends. We have never declared or paid any cash dividends on our common stock and currently do not anticipate paying such cash dividends. We currently anticipate that we will retain all of our future earnings for use in
the development and expansion of our business and for general corporate purposes. Any determination to pay dividends in the future will be at the discretion of our Board of Directors and will depend upon our results of operations, financial
condition, tax laws, and other factors as the Board of Directors, in its discretion, deems relevant. The risk-free interest rate is based upon U.S. Treasury securities with remaining terms similar to the expected term of the share-based awards.

RESULTS OF OPERATIONS

First Quarter of 2006
Compared to First Quarter of 2005

The following table compares revenues and gross margin by segment for the third quarter of 2005 and
2004:



|                           |  |                                      |       |   |      |   |       |          |  |   |            |   |  |    |   
|-------------------------- |  | ------------------------------------ | ----- | - | ---- | - | ----- | -------- |  | - | ---------- | - |  | -- | --
|                           |  | For the three months ended March 31, |       |   |      |   |       |          | 
|(in millions)(unaudited)   |  | 2006                                 |       |   | 2005 |   |       | Increase |  |   | % Increase |  
|BioDiscovery revenues      |  | $                                    | 203.5 |   |      | $ | 162.4 |          |  | $ | 41.1       |   |  | 25 | % 
|BioProduction revenues     |  |                                      | 105.5 |   |      |   | 114.7 |          |  |   | (9.2       | ) |  | (8 | %)
|                           |  |                                      |       |   |      |   |       |          |  |   |            |   |  |    |   
|Total revenues             |  | $                                    | 309.0 |   |      | $ | 277.1 |          |  | $ | 31.9       |   |  | 12 | % 
|                           |  |                                      |       |   |      |   |       |          |  |   |            |   |  |    |   
|BioDiscovery gross margin  |  |                                      | 69.3  | % |      |   | 71.5  | %        |  |   |            |   |  |    |   
|BioProduction gross margin |  |                                      | 48.8  | % |      |   | 48.1  | %        |  |   |            |   |  |    |   
|Total gross margin         |  |                                      | 61.4  | % |      |   | 61.6  | %        |  |   |            |   |  |    |   

Revenues

Revenues increased by $31.9 million or 12% for the first quarter of 2006 compared to the first quarter of 2005. Acquisitions accounted for $34.7 million or 13%. Foreign currency translation reduced revenues by $9.0
million or 3%. The remaining $6.2 million or 2% of growth was mainly due to increased volume of $6.8 million, partially offset by lower royalty revenues of $0.6 million. Beginning with the first quarter of 2006 we revised our definition of the
impact of acquisitions to be the amount of revenue generated by the acquired entity in the periods prior to the acquisition. Previously, we quantified this impact as the amount of revenue generated by the acquired entity in the current quarter.

Gross Margin

Overall gross
margin in the first quarter of 2006 compared to the first quarter of 2005 remained relatively flat. Included in gross margin for the first quarters of 2006 and 2005 was approximately $2.2 million and $0.6 million, respectively, of costs associated
with the write-up of acquired inventory to fair market value as a result of a business combination. In accordance with purchase accounting rules, this acquired inventory was written-up to fair market value and subsequently expensed as the inventory
was sold. The impact of these inventory revaluations decreased our overall gross margin by approximately one percentage point in the first quarter of 2006 compared to the first quarter of 2005. This decrease was partially offset by segment mix and
lower royalty expense as a result of retroactive changes to certain licensing agreements.



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Operating Expenses

The following table compares operating expenses by segment for the first quarter of 2006 and 2005:



|                           |  |                                      |      |                                  |      |   |                  |   |                                  |  |    |                      |  |   |                      |   |  |    |   
|-------------------------- |  | ------------------------------------ | ---- | -------------------------------- | ---- | - | ---------------- | - | -------------------------------- |  | -- | -------------------- |  | - | -------------------- | - |  | -- | --
|                           |  | For the three months ended March 31, |      |                                  |      |   |                  |   |                                 
|                           |  | 2006                                 |      |                                  | 2005 |   |                  |   |                                  |  |    |                     
|(in millions)(unaudited)   |  | Operatingexpense                     |      | As apercentageof segmentrevenues |      |   | Operatingexpense |   | As apercentageof segmentrevenues |  |    | $ Increase(decrease) |  |   | % Increase(decrease) |  
|BioDiscovery segment:      |  |                                      |      |                                  |      |   |                  |   |                                  |  |    |                      |  |   |                      |   |  |    |   
|Sales and marketing        |  | $                                    | 43.2 |                                  | 21   | % |                  | $ | 33.0                             |  | 20 | %                    |  | $ | 10.2                 |   |  | 31 | % 
|General and administrative |  |                                      | 22.6 |                                  | 11   | % |                  |   | 20.0                             |  | 12 | %                    |  |   | 2.6                  |   |  | 13 | % 
|Research and development   |  |                                      | 24.3 |                                  | 12   | % |                  |   | 18.1                             |  | 11 | %                    |  |   | 6.2                  |   |  | 34 | % 
|BioProduction segment:     |  |                                      |      |                                  |      |   |                  |   |                                  |  |    |                      |  |   |                      |   |  |    |   
|Sales and marketing        |  | $                                    | 15.8 |                                  | 15   | % |                  | $ | 15.4                             |  | 13 | %                    |  | $ | 0.4                  |   |  | 3  | % 
|General and administrative |  |                                      | 9.5  |                                  | 9    | % |                  |   | 10.0                             |  | 9  | %                    |  |   | (0.5                 | ) |  | (5 | %)
|Research and development   |  |                                      | 3.5  |                                  | 3    | % |                  |   | 2.9                              |  | 3  | %                    |  |   | 0.6                  |   |  | 21 | % 
|Unallocated(1):            |  |                                      |      |                                  |      |   |                  |   |                                  |  |    |                      |  |   |                      |   |  |    |   
|Sales and marketing        |  | $                                    | 1.2  |                                  |      |   |                  | $ | 0.1                              |  |    |                      |  | $ | 1.1                  |   |  |    |   
|General and administrative |  |                                      | 7.3  |                                  |      |   |                  |   |                                 |  |    |                      |  |   | 7.3                  |   |  |    |   
|Research and development   |  |                                      | 1.1  |                                  |      |   |                  |   | 0.2                              |  |    |                      |  |   | 0.9                  |   |  |    |   
|Consolidated:              |  |                                      |      |                                  |      |   |                  |   |                                  |  |    |                      |  |   |                      |   |  |    |   
|Sales and marketing        |  | $                                    | 60.2 |                                  | 19   | % |                  | $ | 48.5                             |  | 18 | %                    |  | $ | 11.7                 |   |  | 24 | % 
|General and administrative |  |                                      | 39.4 |                                  | 13   | % |                  |   | 30.0                             |  | 11 | %                    |  |   | 9.4                  |   |  | 31 | % 
|Research and development   |  |                                      | 28.9 |                                  | 9    | % |                  |   | 21.2                             |  | 8  | %                    |  |   | 7.7                  |   |  | 36 | % 



|(1) | Consists primarily of shared-based compensation expense associated with the adoption of FAS 123R. See Note 1 of the Condensed Consolidated Financial Statements for
additional information.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Sales and Marketing. For the first quarter of 2006, sales and marketing
expenses increased $11.7 million or 24% compared to the first quarter of 2005. Acquisitions accounted for $6.1 million of incremental expenses in 2006, partially offset by $0.2 million from foreign currency translation. The remaining $5.8 million
increase was mainly due to $5.6 million as a result of increased salaries and headcount, $1.2 million from share-based compensation and $0.8 million in increased promotional and marketing activities, partially offset by $1.8 million in reduced
incentive compensation. Overall, sales and marketing expenses as a percentage of revenues increased one percentage point mainly due to the reasons noted above.

General and Administrative. For the first quarter of 2006, general and administrative expenses increased $9.4 million or 31% compared to the first quarter of 2005. Acquisitions accounted for $4.5
million of incremental expenses in 2006, partially offset by $1.3 million from foreign currency translation. The remaining $6.2 million increase was mainly due to $7.3 million from share-based compensation and $3.1 million as a result of increased
salaries and headcount, partially offset by a $1.4 million reduction in accrued healthcare premium liabilities as a result of lower-than-expected actual claims experience, $1.1 million in reduced incentive compensation and $1.7 million in other cost
reductions as a result of various cost improvement activities. Excluding share-based compensation, general and administrative expenses increased 7% compared to the first quarter of 2005. Overall, general and administrative expenses as a percentage
of revenues increased two percentage points mainly due to the reasons noted above.

Research and Development. Research
and development expenses for the first quarter of 2006 increased $7.7 million or 36% compared to the first quarter of 2005. Acquisitions accounted for $5.4 million of incremental research and development expenses in 2006, partially offset by $0.5
million from foreign currency translation. The remaining $2.8 million increase was mainly due to $2.1 million as a result of increased salaries and headcount, $1.0 million from share-based compensation and $0.5 million in other costs, partially
offset by $0.8 million in reduced incentive compensation.

Purchased Intangibles Amortization. Amortization expense
related to purchased intangible assets acquired in our business combinations was $30.0 million for the first quarter of 2006 compared to $25.9 million for the first quarter of 2005. The $4.1 million increase is primarily due to a greater amount of
intangible assets acquired through acquisitions being amortized in the first quarter of 2006 compared to the first quarter of 2005.



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Business Consolidation Costs. Business consolidation costs for the three months
ended March 31, 2006 were $2.1 million and represent costs associated with our efforts to realign our business and consolidation of certain facilities. These costs consisted mainly of termination benefits of certain employees involuntarily
terminated. We expect to continue to incur business consolidation costs in 2006 as we further consolidate operations and facilities.

Interest Income. Interest income was $6.5 million for the first quarter of 2006, compared to $5.9 million for the first quarter of 2005. Included in 2005 interest income was a $0.9 million loss on sale of investments
related to the acquisition of Dynal. Excluding this loss, interest income was $6.8 million for the first quarter of 2005. The $0.3 million decrease is mainly due to lower average cash and investment balances in the first quarter of 2006 compared to
the first quarter of 2005.

Interest income in the future will be affected by changes in short-term interest rates and changes in cash
balances, which may materially increase or decrease as a result of acquisitions and other financing activities.

Interest
Expense. Interest expense was $8.4 million for the first quarter of 2006 compared to $7.3 million for the first quarter of 2005. The $1.1 million increase was mainly due to a higher average balance of our convertible debt in the first
three months of 2006 compared to the first three months of 2005 as a result of the issuance of our 31/4%
convertible notes in June 2005. The increase was slightly offset by the partial redemption of our 21/4%
convertible notes in the second and fourth quarters of 2005 and the first quarter of 2006.

Provision for Income
Taxes.The estimated annual effective tax rate as a percentage of pre-tax income was 30.4% for the first quarter of 2006 compared with 30.9% for the first quarter of 2005. The decrease in the effective tax rate is due
primarily to an increase in the proportion of income earned in jurisdictions having lower effective tax rates than the U.S., offset by the adoption of Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based
Payments, and the expiration of federal research and development tax credits.

Segment Results for the First Quarter of 2006 Compared to the
First Quarter of 2005

BioDiscovery Segment. BioDiscovery revenues for the first quarter of 2006 increased $41.1 million or 25%
compared to the first quarter of 2005. The increase was mainly driven by acquisitions of 21% and organic growth of 7%, which were partially offset by foreign currency translation of 3%. BioDiscovery gross margin for the first quarter of 2006
decreased two percentage points to 69% compared to the first quarter of 2005. Included in 2006 BioDiscovery gross margin were lower margin products from acquired businesses and higher period costs, each of which accounted for a two percentage point
decrease. This decrease was partially offset by a two percentage point increase due to favorable retroactive changes to certain licensing agreements. BioDiscovery operating margin decreased three percentage points to 25% for the first quarter of
2006 compared to the first quarter of 2005. The decrease was mainly due to the decrease in BioDiscovery gross margin and higher spending in sales and marketing and research and development as a percentage of revenues in the first quarter of 2006
compared to the same quarter in 2005.

BioProduction Segment. BioProduction revenues for the first quarter of 2006 decreased $9.2
million or 8% compared to the first quarter of 2005. The decrease was mainly due to unfavorable foreign currency translation of 3%, overall decrease in volume of 4% primarily driven by lower sales of cell culture products to industrial customers,
and lower average selling prices of 1%. BioProduction gross margin for the first quarter of 2006 increased one percentage point to 49% compared to the first quarter of 2005. The increase was mainly due to lower variable costs associated with
productivity improvements. BioProduction operating margin decreased by one percentage point to 22% for the first quarter of 2006 compared to the first quarter of 2005. The decrease was mainly due to an increase in sales and marketing expenses as a
percentage of revenues, partially offset by the increase in BioProduction gross margin.

LIQUIDITY AND CAPITAL RESOURCES

Cash and cash equivalents were $480.0 million at March 31, 2006, an increase of $44.8 million from December 31, 2005 primarily due to cash
provided from operating activities of $33.2 million, cash provided by investing activities of $43.7 million and favorable impact of foreign currency of $1.2 million, partially offset by cash used in financing activities of $33.3 million.

Operating activities provided net cash of $33.2 million during the first quarter of 2006 primarily from our net income of $19.2 million
and net non-cash charges of $38.3 million. Net changes in operating assets and liabilities reduced cash from operating activities by $24.3 million. The decrease was mainly due to a $25.6 million decrease in accrued expenses and other liabilities as
a result of payment of our 2005 incentive compensation and fewer number of days accrued for payroll, a $12.0 million increase in inventories due to timing of when inventories were produced and sold, a $3.6 million decrease in accounts payable
primarily due to timing of when payments were made. These decreases were partially offset by a $15.4 million increase in income taxes payable primarily due to an increase in our income tax provision, a $0.9 million decrease in



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accounts receivable as a result of lower revenues in the first quarter of 2006 compared to the fourth quarter of 2005 and a $0.5 million increase in prepaid
expenses and other assets.

As a result of working capital improvement programs, we expect to utilize our working capital more efficiently
in the future resulting in higher inventory turnover and lower days sales outstanding. Our working capital factors, such as inventory turnover and days sales outstanding are seasonal, and on an interim basis during the year, may require an influx of
short-term working capital.

On January 9, 2006, we entered into a syndicated $250 million senior secured credit facility (the Credit
Facility) with Bank of America, N.A. Interest rates on outstanding borrowings are determined by reference to LIBOR or to an alternate base rate, with margins determined based on changes in our leverage ratio. Under the terms of the Credit Facility,
we may request that the aggregate amount available be increased by $100 million of additional financing, subject to certain conditions having been met, including the availability of additional lender commitments. The Credit Facility contains various
representations, warranties, affirmative, negative and financial covenants, and conditions of default customary for financings of this type. We currently anticipate using the proceeds of the Credit Facility for the purpose of general working capital
and capital expenditures, and the Credit Facility will terminate and all amounts outstanding under it will be due and payable in full on January 6, 2011. See Note 6 of the Notes to Condensed Consolidated Financial Statements.

As of March 31, 2006, several of the Companys foreign subsidiaries had available bank lines of credit denominated in local currency to meet
short-term working capital requirements. The U.S. dollar equivalent of these facilities totaled $11.5 million, of which $0.5 million was outstanding at March 31, 2006.

We believe our current cash and cash equivalents, investments, cash provided by operations and interest income earned thereon will satisfy our working
capital requirements for the foreseeable future. Our future capital requirements and the adequacy of our available funds will depend on many factors, including future business acquisitions, future stock or note repayment or repurchases, scientific
progress in our research and development programs and the magnitude of those programs, our ability to establish collaborative and licensing arrangements, the cost involved in preparing, filing, prosecuting, maintaining and enforcing patent claims
and competing technological and market developments.

We intend to continue our strategic investment activities in new product development,
in-licensing technologies and acquisitions that support our BioDiscovery and BioProduction platforms. In the event additional funding needs arise, we may obtain cash through new debt or stock issuance, or a combination of sources.

CONTRACTUAL OBLIGATIONS

During the three months
ended March 31, 2006, we terminated an existing operating lease and entered into a new operating lease agreement for the same property for one of our office and manufacturing facilities. The new lease agreement expires in 2022 and provides for
escalating rental payments with the option to renew extending through 2038. See Note 8 to our Condensed Consolidated Financial Statements. We did not enter into any other significant contractual obligations during the three months ended
March 31, 2006. We have no significant contractual obligations not fully recorded on our Condensed Consolidated Balance Sheets or fully disclosed in the Notes to our Condensed Consolidated Financial Statements. We have no off-balance sheet
arrangements as defined in S-K 303(a)(4)(ii).

RISK FACTORS THAT MAY AFFECT FUTURE RESULTS

You should carefully consider the following risks, together with other matters described in this Form 10-Q or incorporated herein by reference in
evaluating our business and prospects. If any of the following risks occurs, our business, financial condition or operating results could be harmed. In such case, the trading price of our securities could decline, in some cases significantly. The
risks described below are not the only ones we face. Additional risks not presently known to us, or that we currently deem immaterial, may also impair our business operations. Certain statements in this Form 10-Q (including certain of the following
factors) constitute forward-looking statements. Please refer to the section entitled Forward-Looking Statements on this Form 10-Q for important limitations on these forward-looking statements.

Risks Related to the Growth of Our Business

We must
continually offer new products and technologies.

Our success depends in large part on continuous, timely development and
introduction of new products that address evolving market requirements and are attractive to customers. For example, prepackaged kits to perform research in particular cell lines and already-isolated genetic material only recently have come into
widespread use among researchers. We also believe that because of the initial time investment required by our customers to purchase a new product, once a customer purchases a product from a competitor, it is very difficult to regain that customer.



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These facts have led us to focus significant efforts and resources on the development and identification
of new technologies and products. As a result, we have a very broad product line and are continually looking to develop, license or acquire new technologies and products to further broaden it. If we fail to develop, license or otherwise acquire new
technologies, our customers will likely purchase products from our competitors, significantly harming our business. Once we have developed or obtained the technology, to the extent that we fail to timely introduce new and innovative products that
are accepted by our markets, we could fail to obtain an adequate return on our research and development, licensing and acquisition investments and could lose market share to our competitors, which would be difficult or impossible to regain and could
seriously damage our business. Some of the factors affecting market acceptance of our products include:



| |  |  | availability, quality and price as compared to competitive products;
| | - |  | --------------------------------------------------------------------



| |  |  | the functionality of new and existing products;
| | - |  | -----------------------------------------------



| |  |  | the timing of introduction of our products as compared to competitive products;
| | - |  | -------------------------------------------------------------------------------



| |  |  | scientists and customers opinions of the products utility and our ability to incorporate their feedback into future products;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------



| |  |  | citation of the products in published research; and
| | - |  | ---------------------------------------------------



| |  |  | general trends in life sciences research and life science informatics software development.
| | - |  | -------------------------------------------------------------------------------------------

Failure to integrate acquired businesses into our operations successfully could adversely affect our business.

As part of our strategy to develop and identify new products and technologies, we have made several acquisitions, and are likely to make more. Our integration of the operations of acquired businesses requires
significant efforts, including the coordination of information technologies, research and development, sales and marketing, operations, manufacturing and finance. These efforts result in additional expenses and involve significant amounts of
managements time that cannot then be dedicated to other projects. Our failure to manage successfully and coordinate the growth of the combined company could also have an adverse impact on our business. In addition, there is no guarantee that
some of the businesses we acquire will become profitable or remain so. If our acquisitions do not reach our initial expectations, we may record unexpected impairment charges. Factors that will affect the success of our acquisitions include:



| |  |  | presence or absence of adequate internal controls and/or significant fraud in the financial systems of acquired companies;
| | - |  | --------------------------------------------------------------------------------------------------------------------------



| |  |  | any decrease in customer loyalty and product orders caused by dissatisfaction with the combined companies product lines and sales and marketing practices, including price
increases;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to retain key employees;
| | - |  | ------------------------------------



| |  |  | the ability of the combined company to achieve synergies among its constituent companies, such as increasing sales of the combined companys products, achieving cost savings
and effectively combining technologies to develop new products.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Risks Related to Our Sales

We face significant competition.

The markets
for our products are very competitive and price sensitive. Our competitors, which could include certain of our customers such as large pharmaceutical companies, have significant financial, operational, sales and marketing resources and experience in
research and development. Our competitors could develop new technologies that compete with our products or even render our products obsolete. If a competitor develops superior technology or cost-effective alternatives to our kits and other products,
our business could be seriously harmed.

The markets for certain of our products, such as electrophoresis products, custom primers,
amplification products, and fetal bovine serum, are also subject to specific competitive risks. These markets are highly price competitive. Our competitors have competed in the past by lowering prices on certain products. If they did so again we may
be forced to respond by lowering our prices. This would reduce revenues and profits. Conversely, failure to anticipate and respond to price competition may hurt our market share.

We believe that customers in our markets display a significant amount of loyalty to their initial supplier of a particular product. Therefore, it may be
difficult to generate sales to potential customers who have purchased products from competitors. Additionally, instead of using kits, there are numerous scientists making materials themselves. To the extent we are unable to be the first to develop
and supply new products, customers may buy from our competitors or make materials themselves, causing our competitive position to suffer.



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There has been a trend toward industry consolidation in our markets for the past several quarters. We
expect this trend toward industry consolidation to continue as companies attempt to strengthen or hold their market positions in an evolving industry and as companies are acquired or are unable to continue operations. We believe that industry
consolidation may result in stronger competitors that are better able to compete as sole-source vendors for customers. This could lead to more variability in operating results and could have a material adverse effect on our business.

Reduction in research and development budgets and government funding may affect sales.

Our customers include researchers at pharmaceutical and biotechnology companies, academic institutions, government laboratories and private foundations.
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 changes in available resources,
mergers of pharmaceutical and biotechnology companies, spending priorities, general economic conditions and institutional and governmental 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, government laboratories or private foundations. In particular a significant portion of our sales have been to researchers whose funding is
dependent upon grants from government agencies such as the U.S. National Institutes of Health (NIH). Although the level of research funding increased significantly during the years of 1999 through 2003, increases for fiscal 2004 and 2005 were
significantly lower. Government funding of research and development is subject to the political process, which is inherently fluid and unpredictable. Other programs, such as homeland security or defense, or general efforts to reduce the federal
budget deficit could be viewed by the U.S. government as a higher priority. Past proposals to reduce budget deficits have included reduced NIH and other research and development allocations. Any shift away from the funding of life sciences research
and development or delays surrounding the approval of government budget proposals may cause our customers to delay or forego purchases of our products, which could seriously damage our business.

In recent years, the pharmaceutical industry has undergone consolidation. Additional mergers or corporate consolidations in the pharmaceutical industry
could cause us to lose customers, which could have a harmful effect on our business.

Our customers generally receive funds from approved
grants at particular times of the year, for example; as determined by the U.S. federal government. In the past, such grants have 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.

Changing purchasing arrangements with our customers could reduce our profit margins.

Certain
of our customers have developed purchasing initiatives to reduce the number of vendors from which they purchase in order to lower their supply costs. In some cases these accounts have established agreements with large distributors, which include
discounts and the distributors direct involvement with the purchasing process. These activities may force us to supply the large distributors with our products at a discount to reach those customers. For similar reasons many larger customers,
including the U.S. government, have requested and may in the future request, special pricing arrangements, including blanket purchase agreements. These agreements may limit our pricing flexibility, which could have an adverse impact on our business,
financial condition and results of operations. Our pricing flexibility could particularly be affected with respect to our price-sensitive products, such as electrophoresis products, custom oligonucleotides (primers), amplification products, and
fetal bovine serum. For a limited number of customers we have made sales, at the customers request, through third-party Internet vendors, to whom we are required to pay commissions. If our Internet sales grow, it could have a negative impact
on our gross margins.

Sales of biological and chemical defense materials subject us to certain risks.

Our biodefense initiative depends upon the acceptance of our products by the U.S. government and its defense contractors.

We have developed products for use in detecting exposure to biological pathogens, and have begun marketing those products to the U.S. government and
several defense contractors. If our products do not perform well, or the U.S. government changes its priorities with respect to defense against biological and chemical weapons, our sales growth could be affected. In addition, some third parties
could object to our development of biological defense products, which could have a negative impact on our company.



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Risks Related to the Development and Manufacturing of Our Products

Fluctuation in the price and supply of raw FBS could affect our business.

The supply of raw fetal bovine serum (FBS) is sometimes limited because serum collection tends to be cyclical. In addition, any additional discovery of bovine spongiform encephalopathy, or BSE (popularly referred to
as mad cow disease) in the U.S. may cause a decline in the demand for FBS supplied from the United States. These factors can cause the price of raw FBS to fluctuate. The profit margins we achieve on finished FBS, one of our major products, have been
unstable in the past because of the fluctuations in the price of raw FBS, and any increase in the price could adversely affect those profit margins. In addition, if we are unable to obtain an adequate supply of FBS, or if we are unable to meet
demand for FBS from supplies outside the U.S., we may lose market share.

Failure to license new technologies could impair our new product
development.

We believe our ability to in-license new technologies from third parties is and will continue to be critical to our
ability to offer new products and therefore our business. A significant portion of our current revenues is from products manufactured or sold under licenses from third parties. Our ability to gain access to technologies that we need for new products
and services depends in part on our ability to convince inventors and their agents or assignees that we can successfully commercialize their inventions. We cannot assure you that we will be able to continue to identify new technologies of interest
to our customers, which are developed by others. Even if we are able to identify new technologies of interest, we may not be able to negotiate a license on acceptable terms, or at all.

Loss of licensed rights could hurt our business.

A small number of our licenses do not run
for the length of the underlying patent. We may not be able to renew our existing licenses on favorable terms, or at all. If we lose the rights to a patented technology, we may need to stop selling these products and possibly other products,
redesign our products or lose a competitive advantage. While most of our licenses are exclusive to us in certain markets, potential competitors could also in-license technologies that we fail to exclusively license and potentially erode our market
share for these and other products. Our licenses also typically subject us to various economic and commercialization obligations. If we fail to comply with these obligations we could lose important rights under a license, such as exclusivity. In
some cases, we could lose all rights under a license. Loss of such rights could, in some cases, harm our business.

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, or a third party could obtain a patent that
curtails our freedom to operate under one or more licenses. We do not receive indemnification from a licensor against third-party claims of intellectual property infringement.

Violation of government regulations or voluntary quality programs could result in loss of revenues and additional expense.

Certain of our products and test services are regulated by the U.S. Food and Drug Administration (FDA) and comparable agencies in other countries as medical devices, pharmaceuticals, or biologics. As a result we must
register with the FDA as both a medical device manufacturer and a manufacturer of drug products and comply with all required regulations. Failure to comply with these regulations can lead to sanctions by the FDA such as written observations made
following inspections, warning letters, product recalls, fines, product seizures and consent decrees. Test data for use in client submissions with the FDA could be disqualified. If the FDA were to take such actions, the FDAs sanctions would be
available to the public. Such publicity could adversely affect our ability to sell these regulated products.

Additionally, some of our
customers use our products and services in the manufacturing process for their drug and medical device products, and such end products are regulated by the FDA under Quality System Regulations (QSR). Although the customer is ultimately responsible
for QSR compliance for their products, it is also the customers expectation that the materials sold to them will meet QSR requirements. We could lose sales and customers, and incur product liability claims, if our products do not meet QSR
requirements.

ISO is an internationally recognized voluntary quality standard that requires compliance with a variety of quality
requirements somewhat similar to the QSR requirements. The operations of our BioProduction segments and Eugene, Oregon facilities are intended to comply with ISO 9001. Failure to comply with this voluntary standard can lead to observations of
non-compliance or even suspension of ISO certification by the certifying unit. If we lose ISO certification, this loss could cause some customers to purchase products from other suppliers.



25



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If we violate a government mandated or voluntary quality program, we may incur additional expense to
comply with the government mandated or voluntary standards. That expense may be material, and we may not have anticipated that expense in our financial forecasts. Our financial results could suffer as a result of these increased expenses.

Risks Related to Our Operations

Loss of key
personnel could hurt our business.

Our products and services are highly technical in nature. In general, only highly qualified and
trained scientists have the necessary skills to develop and market our products and provide our services. In addition, some of our manufacturing positions are highly technical as well. We face intense competition for these professionals from our
competitors, customers, marketing partners and other companies throughout our industry. We do not generally enter into employment agreements requiring these employees to continue in our employment for any period of time. Any failure on our part to
hire, train, and retain a sufficient number of qualified professionals would seriously damage our business. Additionally, integration of acquired companies and businesses can be disruptive, causing key employees to leave. Further, we use stock
options, restricted stock, and restricted stock units/awards to provide incentive to these individuals to stay with us and to build long-term stockholder value. If our stock price fluctuates below the exercise price of these options or reduces the
value of restricted stock and restricted stock units/awards, a key employees incentive to stay is lessened. If we were to lose a sufficient number of our key employees, including research and development scientists, and were unable to replace
them or satisfy our needs for research and development through outsourcing, these losses could seriously damage our business.

Litigation may harm
our business or otherwise distract our management.

Substantial, complex or extended litigation could cause us to incur large
expenditures and distract our management. For example, lawsuits by employees, stockholders, collaborators, distributors, customers, or end-users of our products or services could be very costly and substantially disrupt our business. Disputes from
time to time with such companies or individuals are not uncommon, and we cannot assure you that we will always be able to resolve such disputes out of court or on terms favorable to us. Unexpected results could cause our financial exposure in these
matters to exceed stated reserves and insurance, requiring us to allocate additional funds and other resources to address these liabilities.

We have
a significant amount of debt, which could adversely affect our financial condition.

We have $188 million of subordinated
convertible notes that are due in 2006, $350 million of senior convertible notes that are due in 2023, $450 million of senior convertible notes due in 2024 and $350 million of senior convertible notes due in 2025. In addition, the holders of our
$350 million of senior convertible notes due in 2023 have the option to require us to redeem the notes for cash at par value in August of 2010, 2013 or 2018. The holders of our $450 million senior convertible notes have the option to require us to
redeem the notes for cash at par value in February of 2012, 2017 or 2022. The holders of our $350 million senior convertible notes due in 2025 have the option to require us to redeem the notes for cash at par value in June of 2011, 2015 or 2020. If
we are unable to generate sufficient cash flow or otherwise obtain funds necessary to make required payments on these notes, we will be in default under the terms of the loan agreements or indentures, which could, in turn, cause defaults under the
remainder of these existing and any future debt obligations.

Even if we are able to meet our debt service obligations, the amount of debt
we have could adversely affect us in a number of ways, including by:



| |  |  | limiting our ability to obtain any necessary financing in the future for working capital, capital expenditures, debt service requirements, or other purposes;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | limiting our flexibility in planning for, or reacting to, changes in our business;
| | - |  | ----------------------------------------------------------------------------------



| |  |  | placing us at a competitive disadvantage relative to our competitors who have lower levels of debt;
| | - |  | ---------------------------------------------------------------------------------------------------



| |  |  | making us more vulnerable to a downturn in our business or the economy generally;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | subjecting us to the risk of being forced to refinance these amounts when due at higher interest rates; and
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | requiring us to use a substantial portion of our cash to pay principal and interest on our debt, instead of contributing those funds to other purposes such as working capital and
capital expenditures.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We could lose the tax deduction on our convertible senior notes due in 2023, the convertible senior notes due in
2024 and the convertible senior notes due in 2025 under certain circumstances.

We could lose some or all of the tax deduction for
interest expense associated with our convertible senior notes due in 2023, the convertible senior notes due in 2024 and the convertible senior notes due in 2025 if, under certain circumstances, the foregoing notes are not subject to the special
Treasury Regulations governing contingent payment debt instruments or the



26



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exchange of these notes is deemed to be a taxable exchange. We also could lose the tax deduction for interest expense associated with the foregoing notes if
we were to invest in non-taxable investments.

Risks Related to Our International Operations

International unrest or foreign currency fluctuations could adversely affect our results.

Including subsidiaries and distributors, our products are currently marketed in approximately 70 countries throughout the world. Our international
revenues, which include revenues from our non-U.S. subsidiaries and export sales from the U.S., represented 50% of our product revenues in 2005, 49% of our product revenues in 2004, and 48% of our product revenues in 2003. We expect that
international revenues will continue to account for a significant percentage of our revenues for the foreseeable future. There are a number of risks arising from our international business, including those related to:



| |  |  | foreign currency exchange rate fluctuations, potentially reducing the U.S. Dollars we receive for sales denominated in foreign currency;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the possibility that unfriendly nations or groups could boycott our products;
| | - |  | -----------------------------------------------------------------------------



| |  |  | general economic and political conditions in the markets in which we operate;
| | - |  | -----------------------------------------------------------------------------



| |  |  | potential increased costs associated with overlapping tax structures;
| | - |  | ---------------------------------------------------------------------



| |  |  | potential trade restrictions and exchange controls;
| | - |  | ---------------------------------------------------



| |  |  | more limited protection for intellectual property rights in some countries;
| | - |  | ---------------------------------------------------------------------------



| |  |  | difficulties and costs associated with staffing and managing foreign operations;
| | - |  | --------------------------------------------------------------------------------



| |  |  | unexpected changes in regulatory requirements;
| | - |  | ----------------------------------------------



| |  |  | the difficulties of compliance with a wide variety of foreign laws and regulations;
| | - |  | -----------------------------------------------------------------------------------



| |  |  | longer accounts receivable cycles in certain foreign countries, whether cultural, due to exchange rate fluctuation or other factors;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------



| |  |  | import and export licensing requirements; and
| | - |  | ---------------------------------------------



| |  |  | changes to our distribution networks.
| | - |  | -------------------------------------

A significant
portion of our business is conducted in currencies other than the U.S. dollar, which is our reporting currency. Our 2005 acquisition of Dynal Biotech Holding AS substantially increases the portion of our business that is conducted in Norwegian
Kroner and the associated currency translation risk. While we attempt to hedge cash flows in these currencies, this program relies in part on forecasts of these cash flows and the expected range of fluctuations. As a result, we cannot assure you
this program will adequately protect our operating results from the full effects of exchange rate fluctuations. We also continually evaluate the costs and benefits of our hedging program and cannot assure you that we will continue to conduct hedging
activities. As a result, fluctuations between the currencies in which we do business have caused and will continue to cause foreign currency transaction gains and losses. We cannot predict the effects of currency exchange rate fluctuations upon our
future operating results because of the number of currencies involved, the variability of currency exposures, and the volatility of currency exchange rates.

Risks Related to Our Intellectual Property

Inability to protect our technologies could affect our ability to compete.

Our success depends to a significant degree upon our ability to develop proprietary products and technologies. When we develop such
technologies, we routinely seek patent protection in the United States and abroad to the extent permitted by law. However, we cannot assure you that patents will be granted on any of our patent applications or that the scope of any of our issued
patents will be sufficiently broad to offer meaningful protection. We only have patents issued in selected countries. Therefore, third parties can make, use, and sell products covered by our patents in any country in which we do not have patent
protection. In addition, our issued patents or patents we license could be successfully challenged, invalidated or circumvented so that our patent rights would not create an effective competitive barrier. We provide our customers the right to use
our products under label licenses that are for research purposes only. The validity of the restrictions contained in these licenses could be contested, and we cannot assure you that we would either be aware of an unauthorized use or be able to
enforce the restrictions in a cost-effective manner. Additionally, the value of our patents could be negatively impacted as a result of judicial decisions or legislative changes.

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, defend our right to use such technology in court or pay license fees. Although we might under these circumstances attempt to obtain a license to such intellectual property, we may not be able to do so on favorable terms,
or at all. Additionally, if our products are found to infringe a third partys intellectual property, we may be required to pay damages for past infringement, and lose the ability to sell certain products or receive licensing revenues.



27



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Disclosure of trade secrets could aid our competitors.

We attempt to protect our trade secrets by entering into confidentiality agreements with third parties, our employees and consultants. However, these
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 litigation and 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. We are
currently a defendant in several court actions involving our intellectual property. 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. We may not be able to resolve these types of claims successfully in the future.

We are currently enforcing our
intellectual property rights through patent litigation in several court actions. We have incurred substantial costs, and are currently incurring substantial costs, in enforcing our intellectual property rights, primarily relating to H minus reverse
transcriptase (which is the basis for our Superscript and related product lines), competent cells, and gels, and we expect to incur such costs in the future for these and other technologies. In the event of additional intellectual property
disputes, we may be involved in further litigation. In addition to court actions, patent litigation could involve proceedings before the U.S. Patent and Trademark Office or the International Trade Commission. Intellectual property litigation can be
extremely expensive, and such expense, as well as the consequences should we not prevail, could seriously harm our business. If we do not prevail in our pending patent litigation relating to H minus reverse transcriptase, we may be unable to prevent
third parties from using this technology in the commercial marketplace. This could have a seriously harmful effect on our business.

Risks Related to
Environmental and Product Liability Issues

We are subject to risks related to handling of hazardous materials and other regulations governing
environmental safety.

Our operations are subject to complex and stringent environmental, health, safety and other governmental laws
and regulations that both public officials and private individuals may seek to enforce. Our activities that are subject to these regulations include, among other things, our use of hazardous and radioactive materials and the generation,
transportation and storage of waste. While we believe we are in material compliance with these laws and regulations, we could discover that we or an acquired business is not in material compliance. Existing laws and regulations may also be revised
or reinterpreted, or new laws and regulations may become applicable to us, whether retroactively or prospectively, that may have a negative effect on our business and results of operations. It is also impossible to completely eliminate the risk of
accidental environmental contamination or injury to individuals. In such an event, we could be liable for any damages that result, which could adversely affect our business. Additionally, although unlikely, a catastrophic incident could partially or
completely shut down our research and manufacturing facilities and operations.

Furthermore, in acquiring Dexter, we assumed certain of
Dexters environmental liabilities, including clean-up of several hazardous waste sites listed on the National Priority List under federal Superfund law. Unexpected results related to the investigation and clean-up of these sites could cause
our financial exposure in these matters to exceed stated reserves and insurance, requiring us to allocate additional funds and other resources to address our environmental liabilities, which could cause a material adverse effect on our business.

Potential product liability claims could affect our earnings and financial condition.

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

Some of our services include the manufacture of biologic products to be tested in human clinical trials. We could be
held liable for errors and omissions in connection with these services. In addition, we formulate, test and manufacture products intended for use by the public. These activities could expose us to risk of liability for personal injury or death to
persons using such products, although we do not commercially market or sell the products to end users. We seek to reduce our potential liability through measures such as contractual indemnification provisions with clients (the scope of which may
vary



28



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from client-to-client, and the performances of which are not secured), insurance maintained by clients and conducting certain of these businesses through
subsidiaries. Notwithstanding, we could be materially and adversely affected if we were required to pay damages or incur defense costs in connection with a claim that is outside the scope of the indemnification agreements, if the indemnity, although
applicable, is not performed in accordance with its terms or if our liability exceeds the amount of applicable insurance or indemnity. In addition, we could be held liable for errors and omissions in connection with the services we perform. We
currently maintain product liability and errors and omissions insurance with respect to these risks. There can be no assurance that our insurance coverage will be adequate or that insurance coverage will continue to be available on terms acceptable
to us.

Risks Related to the Market for Our Securities

Our operating results and the market price of our stock and convertible notes could be volatile.

Our operating
results and stock price have in the past been, and will continue to be, subject to quarterly fluctuations as a result of a number of factors, including those listed in this section of this Quarterly Report and those we have failed to foresee. Our
stock price and the price of our convertible notes could also be affected by an inability to meet analysts expectations, general fluctuations in the stock market or the stocks of companies in our industry or those of our customers. Such
volatility has had a significant effect on the market prices of many companies securities for reasons unrelated to their operating performance, and has in the past led to securities class action litigation. Securities litigation against us
could result in substantial costs and a diversion of our managements attention and resources, which could have an adverse effect on our business.



|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------

We are exposed to market risk related to changes in foreign currency exchange rates, commodity prices, and interest rates, and we selectively use financial instruments to manage these risks. We do not enter into financial instruments for
speculation or trading purposes. These financial exposures are monitored and managed by us as an integral part of our overall risk management program, which recognizes the unpredictability of financial markets and seeks to reduce potentially adverse
effects on our results.

Foreign Currency Transactions. We have operations in Europe, Asia-Pacific and the Americas. As a result,
our financial position, results of operations and cash flows can be affected by fluctuations in foreign currency exchange rates. Many of our reporting entities conduct a portion of their business in currencies other than the entitys functional
currency. These transactions give rise to receivables and payables that are denominated in currencies other than the entitys functional currency. The value of these receivables and payables is subject to changes in exchange rates because they
may become worth more or less than they were worth at the time we entered into the transaction due to changes in currency exchange rates. Both realized and unrealized gains or losses on the value of these receivables and payables are included in the
determination of net income. Realized and unrealized gains or losses on the value of financial contracts entered into to hedge the currency exchange rate exposure of these receivables and payables are also included in the determination of net
income. Net currency exchange gains recognized on business transactions, net of hedging transactions, were $0.4 million for the three months ended March 31, 2006 and are included in other income and expense in the Condensed Consolidated
Statements of Income.

Our currency exposures vary, but are primarily concentrated in the euro, British pound sterling, Norwegian kroner
and Japanese yen. Historically, we have used foreign currency forward contracts to mitigate foreign currency risk on foreign currency receivables and payables. At March 31, 2006, we had $14.8 million in foreign currency forward contracts
outstanding to hedge currency risk on specific receivables and payables. These contracts, which all settle in April 2006, effectively fix the exchange rate at which these specific receivables and payables will be settled in, so that gains or losses
on the forward contracts offset the losses or gains from changes in the value of the underlying receivables and payables.

In addition to
hedging the value of our foreign currency receivables and payables, our foreign currency-hedging program includes hedging of forecasted foreign currency cash flows. The increase or decrease in value of forward contracts to hedge forecasted foreign
currency cash flows prior to their maturity are accounted for as cash flow hedges and recorded in other comprehensive income in the Condensed Consolidated Balance Sheets. To the extent any portion of the forward contracts is determined to not be an
effective hedge, the increase or decrease in value prior to the maturity are recorded in other income and expense in the Condensed Consolidated Statements of Income. At March 31, 2006, we did not have any outstanding forward contracts to hedge
forecasted foreign currency cash flows.

Commodity Prices. Our exposure to commodity price changes relates to certain manufacturing
operations that utilize certain commodities as raw materials. We manage our exposure to changes in those prices primarily through our procurement and sales practices.



29



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Interest Rates. Our investment portfolio is maintained in accordance with our investment policy
that defines allowable investments, specifies credit quality standards and limits the credit exposure of any single issuer. The fair value of our cash equivalents and marketable securities is subject to change as a result of changes in market
interest rates and investment risk related to the issuers credit worthiness. We do not utilize financial contracts to manage our exposure in our investment portfolio to changes in interest rates. At March 31, 2006, we had $711.0 million
in cash, cash equivalents and marketable securities, all of which are stated at fair value. Changes in market interest rates would not be expected to have a material impact on the fair value of $480.0 million of our cash and cash equivalents at
March 31, 2006, as these consisted of securities with maturities of less than three months. A 100 basis point increase or decrease in interest rates would, however, decrease or increase, respectively, the remaining $231.0 million of our
investments by approximately $0.7 million. While changes in interest rates may affect the fair value of our investment portfolio, any gains or losses will not be recognized in our statement of income until the investment is sold or if the reduction
in fair value was determined to be a permanent impairment.



|Item 4. | Controls and Procedures
|------- | -----------------------

The Company maintains
disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act in 1934, as amended (the Exchange Act)) that are designed to ensure that information required to be disclosed in the
Companys reports filed under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SECs rules and forms, and that such information is accumulated and communicated to the Companys
management, including the Companys Principal Executive Officer and Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

As of the end of the period covered by this report (the Evaluation Date), an evaluation was carried out under the supervision and with the
participation of the Companys management, including the Companys Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of the Companys disclosure controls and procedures as of
the Evaluation Date. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer have concluded that the Companys disclosure controls and procedures were effective at the reasonable assurance level as of the
Evaluation Date.

In addition, the Principal Executive Officer and Principal Financial Officer have concluded that there have been no
changes to the Companys internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the last fiscal quarter that has materially affected, or are reasonably likely to materially affect,
the Companys internal control over financial reporting.

PART II. OTHER INFORMATION



|Item 1. | Legal Proceedings
|------- | -----------------

We are engaged in various legal
actions arising in the ordinary course of our business and believe that the ultimate outcome of these actions will not have a material adverse effect on our business or financial condition.



|Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds
|------- | -----------------------------------------------------------



| | a) | None.
| | -- | -----



| | b) | None.
| | -- | -----



| | c) | 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
|------- | --------------------------------

Exhibits: For a
list of exhibits filed with this report, refer to the Index to Exhibits.



30



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SIGNATURES

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



|                     |  |  |  |                        |  |                          |  |                                 
|-------------------- |  |  |  | ---------------------- |  | ------------------------ |  | --------------------------------
|                     |  |  |  | INVITROGEN CORPORATION
|                     |  |  | 
|Date: April 28, 2006 |  |  |  | By:                    |  | /s/ David F. Hoffmeister
|                     |  |  |  |                        |  |                          |  | David F. Hoffmeister            
|                     |  |  |  |                        |  |                          |  | Chief Financial Officer         
|                     |  |  |  |                        |  |                          |  | (Principal Financial Officer and
|                     |  |  |  |                        |  |                          |  | Authorized Signatory)           



31



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INDEX TO EXHIBITS



|               |  |                                                                                                                                                                                                                                     
|-------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|EXHIBIT NUMBER |  | DESCRIPTION OF DOCUMENT                                                                                                                                                                                                             
|3.1            |  | Restated Certificate of Incorporation of Invitrogen, as amended.(1)                                                                                                                                                                 
|               | 
|3.2            |  | Amended and Restated Bylaws of Invitrogen.(2)                                                                                                                                                                                       
|               | 
|3.3            |  | Certificate of Correction to the Restated Certificate of Incorporation of Invitrogen, dated February 21, 2001.(3)                                                                                                                   
|               | 
|4.1            |  | Specimen Common Stock Certificate.(4)                                                                                                                                                                                               
|               | 
|4.2            |  | 5 1/2% Convertible Subordinated Notes Due 2007, Registration Rights Agreement, by and among Invitrogen, and Donaldson, Lufkin & Jenrette Securities Corporation et al., as Initial
Purchasers, dated March 1, 2000.(5)              
|               | 
|4.3            |  | Indenture, by and between Invitrogen and State Street Bank and Trust Company of California, N.A., dated March 1, 2000.(5)                                                                                                           
|               | 
|4.4            |  | 2 1/4% Convertible Subordinated Notes due 2006, Registration Rights Agreement, by and among Invitrogen and Credit Suisse First Boston Corporation et al., as Initial Purchasers, dated December
11, 2001.(6)                        
|               | 
|4.5            |  | Indenture, by and between Invitrogen and State Street Bank and Trust Company of California, N.A. and Table of Contents of Indenture, including Cross-Reference Table to the Trust Indenture Act
of 1989, dated December 11, 2001.(6)
|               | 
|4.6            |  | 2% Convertible Senior Notes Due 2023, Registration Rights Agreement, by and among Invitrogen, and UBS Securities LLC and Credit Suisse First Boston LLC, as Initial Purchasers, dated August 1,
2003.(7)                            
|               | 
|4.7            |  | Indenture, by and between Invitrogen and U.S. Bank National Association, dated August 1, 2003.(7)                                                                                                                                   
|               | 
|4.8            |  | 11/2% Convertible Senior Notes Due 2024, Registration
Rights Agreement, by and among Invitrogen, and UBS Securities LLC and Bear Stearns & Co Inc., as Initial Purchasers, dated February 19, 2004.(8)                              
|               | 
|4.9            |  | Indenture, by and between Invitrogen and U.S. Bank National Association, dated February 19, 2004.(8)                                                                                                                                
|               | 
|4.10           |  | Indenture, by and between Invitrogen and U.S. Bank National Association, dated as of December 14, 2004. (9)                                                                                                                         
|               | 
|4.11           |  | Indenture, by and between Invitrogen and U.S. Bank National Association, dated as of December 14, 2004. (9)                                                                                                                         
|               | 
|4.12           |  | 3.25% Convertible Senior Notes Due 2025, Registration Rights Agreement, by and among Invitrogen, and UBS Securities LLC and Banc of America Securities LLC., as Initial Purchasers, dated June
20, 2005. (10)                       
|               | 
|4.13           |  | 3.25% Convertible Senior Notes Due 2025, Indenture, by and between Invitrogen and U.S. Bank National Association, dated June 20, 2005.(10)                                                                                          
|               | 
|10.93          |  | Executive Officer Severance Plan and Summary Plan Description.(11)                                                                                                                                                                  
|               | 
|10.94          |  | Change-in-Control Agreement by and between Invitrogen Corporation and John L. Miller, dated as of December 5, 2005.(12)                                                                                                             
|               | 
|10.95          |  | Indemnification Agreement by and between Invitrogen Corporation and John L. Miller, dated as of December 5, 2005.(12)                                                                                                               
|               | 
|10.96          |  | Change-in-Control Agreement by and between Invitrogen Corporation and Jon Hindar, dated as of January 3, 2006.(12)                                                                                                                  
|               | 
|10.97          |  | Indemnification Agreement by and between Invitrogen Corporation and Jon Hindar, dated as of January 3, 2006.(12)                                                                                                                    
|               | 
|31.1           |  | Certification of Chief Executive Officer                                                                                                                                                                                            
|               | 
|31.2           |  | Certification of Chief Financial Officer                                                                                                                                                                                            
|               | 
|32.1           |  | Certification of Chief Executive Officer                                                                                                                                                                                            
|               | 
|32.2           |  | Certification of Chief Financial Officer                                                                                                                                                                                            

---

|(1) | Incorporated by reference to the Registrants Quarterly Report on Form 10-Q for the Quarterly Period Ended September 30, 2000 (File No. 000-25317).
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | The Amended and Restated Bylaws are incorporated by reference to the Registrants Registration Statement on Form S-1 (File No. 333-68665). A further amendment to the
Bylaws adopted by a Resolution of the Board of Directors dated July 19, 2001 is incorporated by reference to the Registrants Quarterly Report on Form 10-Q for the Quarterly Period Ended June 30, 2001 (File No. 000-25317).
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(3) | Incorporated by reference to the Registrants Quarterly Report on Form 10-Q for the Quarterly Period Ended March 31, 2001 (File No. 000-25317).
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------



32



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|(4) | Incorporated by reference to Registrants Registration Statement on Form S-1 (File No. 333-68665).
|--- | --------------------------------------------------------------------------------------------------



|(5) | Incorporated by reference to the Registrants Registration Statement on Form S-3 (File No. 333-37964).
|--- | ------------------------------------------------------------------------------------------------------



|(6) | Incorporated by reference to the Registrants Annual Report on Form 10-K for the Year Ended December 31, 2001 (File No. 000-25317), as amended.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------



|(7) | Incorporated by reference to Registrants Registration Statement on Form S-3 (File No. 333-110060).
|--- | ---------------------------------------------------------------------------------------------------



|(8) | Incorporated by reference to Registrants Quarterly Report on Form 10-Q for the Quarterly Period ended March 31, 2004 (File No. 000-25317).
|--- | -------------------------------------------------------------------------------------------------------------------------------------------



|(9) | Incorporated by reference to Registrants Quarterly Report on Form 10-K for the year period ended December 31, 2004. (File No. 000-25317).
|--- | ------------------------------------------------------------------------------------------------------------------------------------------



|(10) | Incorporated by reference to Registrants Current Report on Form 8-K, filed on June 24, 2005 (File No. 000-25317).
|---- | ------------------------------------------------------------------------------------------------------------------



|(11) | Incorporated by reference to Registrants Current Report on Form 8-K, filed on February 28, 2006 (File No. 000-25317).
|---- | ----------------------------------------------------------------------------------------------------------------------



|(12) | Incorporated by reference to Registrants Current Report on Form 8-K, filed on January 9, 2006 (File No. 000-25317).
|---- | --------------------------------------------------------------------------------------------------------------------



33