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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



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FORM 10-Q



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

For the quarterly period ended June 30, 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 000-23223



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CURAGEN CORPORATION

(Exact name of registrant as specified in its charter)



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|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Delaware                                                       |  | 06-1331400                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)
|                                                               | 
|322 East Main Street, Branford, Connecticut                    |  | 06405                               
|(Address of principal executive offices)                       |  | (Zip Code)                          

Registrants telephone number, including area code: (203) 481-1104



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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 ̈ |  | Accelerated filer  x |  | Non-accelerated filer ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act.).    Yes ̈No  x

The number of shares outstanding of the Registrants common stock as of July 28, 2006 was 56,142,702.



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##### Table of Contents

CURAGEN CORPORATION AND SUBSIDIARY

FORM 10-Q

INDEX



|                              |  |          |  |                                                                                                                       |  |       
|----------------------------- |  | -------- |  | --------------------------------------------------------------------------------------------------------------------- |  | ------
|                              |  |          |  |                                                                                                                       |  | Page  
|PART I. Financial Information |  |         
|                              |  |          | 
|                              |  | Item 1.  |  | Financial Statements                                                                                                  |  |       
|                              |  |          | 
|                              |  |          |  | Condensed Consolidated Balance Sheets June 30, 2006 and December 31, 2005 (unaudited)                                 |  | 3     
|                              |  |          | 
|                              |  |          |  | Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2006 and 2005 (unaudited) |  | 4     
|                              |  |          | 
|                              |  |          |  | Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2006 and 2005 (unaudited)           |  | 5     
|                              |  |          | 
|                              |  |          |  | Notes to Condensed Consolidated Financial Statements (unaudited)                                                      |  | 6 - 13
|                              |  |          | 
|                              |  | Item 2.  |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                                 |  | 14 -26
|                              |  |          | 
|                              |  | Item 3.  |  | Quantitative and Qualitative Disclosures About Market Risk                                                            |  | 27    
|                              |  |          | 
|                              |  | Item 4.  |  | Controls and Procedures                                                                                               |  | 27    
|                              | 
|PART II. Other Information    |  |         
|                              |  |          | 
|                              |  | Item 1A. |  | Risk Factors                                                                                                          |  | 28    
|                              |  |          | 
|                              |  | Item 4.  |  | Submission of Matters to a Vote of Security Holders                                                                   |  | 29    
|                              |  |          | 
|                              |  | Item 6.  |  | Exhibits                                                                                                              |  | 30    
|                              | 
|Signatures                    |  | 31      
|                              | 
|Exhibit Index                 |  | 32      



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##### Table of Contents

CURAGEN CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value and share data)

(unaudited)



|                                                                          |  |              |          |   |                  |   |          |  
|------------------------------------------------------------------------- |  | ------------ | -------- | - | ---------------- | - | -------- | -
|                                                                          |  | June 30,2006 |          |   | December 31,2005 |  
|ASSETS                                                                    |  |              |          |   |                  |   |          |  
|Current assets:                                                           |  |              |          |   |                  |   |          |  
|Cash and cash equivalents                                                 |  | $            | 27,420   |   |                  | $ | 20,757   |  
|Short-term investments                                                    |  |              | 26,737   |   |                  |   | 22,267   |  
|Marketable securities                                                     |  |              | 139,437  |   |                  |   | 183,504  |  
|                                                                          |  |              |          |   |                  |   |          |  
|Cash and investments                                                      |  |              | 193,594  |   |                  |   | 226,528  |  
|Income taxes receivable                                                   |  |              | 418      |   |                  |   | 709      |  
|Inventory                                                                 |  |              | 7,245    |   |                  |   | 4,103    |  
|Accounts receivable                                                       |  |              | 6,278    |   |                  |   | 3,491    |  
|Prepaid expenses                                                          |  |              | 3,864    |   |                  |   | 1,522    |  
|                                                                          |  |              |          |   |                  |   |          |  
|Total current assets                                                      |  |              | 211,399  |   |                  |   | 236,353  |  
|                                                                          |  |             
|Property and equipment, net                                               |  |              | 18,247   |   |                  |   | 21,705   |  
|Intangible and other assets, net                                          |  |              | 15,146   |   |                  |   | 12,399   |  
|                                                                          |  |              |          |   |                  |   |          |  
|Total assets                                                              |  | $            | 244,792  |   |                  | $ | 270,457  |  
|                                                                          |  |              |          |   |                  |   |          |  
|LIABILITIES AND STOCKHOLDERS EQUITY                                      |  |              |          |   |                  |   |          |  
|Current liabilities:                                                      |  |              |          |   |                  |   |          |  
|Accounts payable                                                          |  | $            | 2,714    |   |                  | $ | 2,943    |  
|Accrued expenses                                                          |  |              | 5,402    |   |                  |   | 3,864    |  
|Accrued payroll and related items                                         |  |              | 1,467    |   |                  |   | 1,775    |  
|Interest payable                                                          |  |              | 3,305    |   |                  |   | 3,305    |  
|Current portion of deferred revenue                                       |  |              | 5,542    |   |                  |   | 7,766    |  
|Other current liabilities                                                 |  |              | 2,265    |   |                  |   | 2,887    |  
|Current portion of convertible subordinated debt                          |  |              | 66,228   |   |                  |   |         |  
|                                                                          |  |              |          |   |                  |   |          |  
|Total current liabilities                                                 |  |              | 86,923   |   |                  |   | 22,540   |  
|                                                                          |  |              |          |   |                  |   |          |  
|Long-term liabilities:                                                    |  |              |          |   |                  |   |          |  
|Convertible subordinated debt, net of current portion                     |  |              | 110,000  |   |                  |   | 176,228  |  
|Long-term liabilities                                                     |  |              | 568      |   |                  |   | 518      |  
|Deferred revenue, net of current portion                                  |  |              | 12,350   |   |                  |   | 14,250   |  
|                                                                          |  |              |          |   |                  |   |          |  
|Total long-term liabilities                                               |  |              | 122,918  |   |                  |   | 190,996  |  
|                                                                          |  |              |          |   |                  |   |          |  
|Commitments and contingencies                                             |  |              |          |   |                  |   |          |  
|                                                                          |  |             
|Minority interest in subsidiary                                           |  |              | 457      |   |                  |   | 485      |  
|                                                                          |  |              |          |   |                  |   |          |  
|Stockholders equity:                                                     |  |              |          |   |                  |   |          |  
|Common Stock; $.01 par value, issued and outstanding 56,131,753 shares at |  |              |          |   |                  |   |          |  
|June 30, 2006, and 55,642,080 shares at December 31, 2005                 |  |              | 561      |   |                  |   | 556      |  
|Additional paid-in capital                                                |  |              | 515,176  |   |                  |   | 514,862  |  
|Accumulated other comprehensive income (loss)                             |  |              | 53       |   |                  |   | (2,833   | )
|Accumulated deficit                                                       |  |              | (481,296 | ) |                  |   | (453,133 | )
|Unamortized stock-based compensation                                      |  |              |         |   |                  |   | (3,016   | )
|                                                                          |  |              |          |   |                  |   |          |  
|Total stockholders equity                                                |  |              | 34,494   |   |                  |   | 56,436   |  
|                                                                          |  |              |          |   |                  |   |          |  
|Total liabilities and stockholders equity                                |  | $            | 244,792  |   |                  | $ | 270,457  |  
|                                                                          |  |              |          |   |                  |   |          |  

See accompanying notes to condensed consolidated financial statements



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CURAGEN CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)



|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|---------------------------------------------------------------------------------------- |  | -------------------------- | ------- | - | ------------------------ | - | ------- | ---- |  | - | ------- | - |  | - | ------- | -
|                                                                                         |  | Three Months EndedJune 30, |         |   | Six Months EndedJune 30, |  
|                                                                                         |  | 2006                       |         |   | 2005                     |   |         | 2006 |  |   | 2005    |  
|Revenue:                                                                                 |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Product revenue                                                                          |  | $                          | 5,352   |   |                          | $ | 2,128   |      |  | $ | 9,847   |   |  | $ | 3,210   |  
|Sequencing service revenue                                                               |  |                            | 2,255   |   |                          |   | 478     |      |  |   | 4,702   |   |  |   | 739     |  
|Collaboration revenue                                                                    |  |                            | 1,241   |   |                          |   | 1,036   |      |  |   | 3,034   |   |  |   | 2,404   |  
|Grant revenue                                                                            |  |                            | 864     |   |                          |   | 617     |      |  |   | 1,348   |   |  |   | 1,336   |  
|Milestone revenue                                                                        |  |                            | 950     |   |                          |   | 31      |      |  |   | 1,900   |   |  |   | 31      |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Total revenue                                                                            |  |                            | 10,662  |   |                          |   | 4,290   |      |  |   | 20,831  |   |  |   | 7,720   |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Operating expenses:                                                                      |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Cost of product revenue                                                                  |  |                            | 3,314   |   |                          |   | 471     |      |  |   | 5,941   |   |  |   | 678     |  
|Cost of sequencing service revenue                                                       |  |                            | 1,049   |   |                          |   | 188     |      |  |   | 2,039   |   |  |   | 307     |  
|Grant research                                                                           |  |                            | 798     |   |                          |   | 524     |      |  |   | 1,197   |   |  |   | 945     |  
|Research and development                                                                 |  |                            | 14,791  |   |                          |   | 15,273  |      |  |   | 29,197  |   |  |   | 32,730  |  
|General and administrative                                                               |  |                            | 4,939   |   |                          |   | 4,603   |      |  |   | 10,324  |   |  |   | 8,954   |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Total operating expenses                                                                 |  |                            | 24,891  |   |                          |   | 21,059  |      |  |   | 48,698  |   |  |   | 43,614  |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Loss from operations                                                                     |  |                            | (14,229 | ) |                          |   | (16,769 | )    |  |   | (27,867 | ) |  |   | (35,894 | )
|Interest income                                                                          |  |                            | 1,965   |   |                          |   | 2,207   |      |  |   | 3,941   |   |  |   | 4,314   |  
|Interest expense                                                                         |  |                            | (2,337  | ) |                          |   | (3,234  | )    |  |   | (4,685  | ) |  |   | (6,595  | )
|Gain on extinguishment of debt                                                           |  |                            |        |   |                          |   | 1,408   |      |  |   |        |   |  |   | 1,408   |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Loss before income tax benefit and minority interest in subsidiary loss                  |  |                            | (14,601 | ) |                          |   | (16,388 | )    |  |   | (28,611 | ) |  |   | (36,767 | )
|Income tax benefit                                                                       |  |                            | 55      |   |                          |   | 72      |      |  |   | 109     |   |  |   | 145     |  
|Minority interest in subsidiary loss                                                     |  |                            | 247     |   |                          |   | 636     |      |  |   | 339     |   |  |   | 1,543   |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Net loss                                                                                 |  | $                          | (14,299 | ) |                          | $ | (15,680 | )    |  | $ | (28,163 | ) |  | $ | (35,079 | )
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Basic and diluted net loss per share                                                     |  | $                          | (0.26   | ) |                          | $ | (0.31   | )    |  | $ | (0.51   | ) |  | $ | (0.70   | )
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Weighted average number of shares used in computing basic and diluted net loss per share |  |                            | 54,798  |   |                          |   | 50,329  |      |  |   | 54,709  |   |  |   | 50,301  |  
|                                                                                         |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  

See accompanying notes to condensed consolidated financial statements



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CURAGEN CORPORATION AND SUBSIDIARY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)



|                                                                            |  |                          |         |   |      |   |         |  
|--------------------------------------------------------------------------- |  | ------------------------ | ------- | - | ---- | - | ------- | -
|                                                                            |  | Six Months EndedJune 30, |        
|                                                                            |  | 2006                     |         |   | 2005 |  
|Cash flows from operating activities:                                       |  |                          |         |   |      |   |         |  
|Net loss                                                                    |  | $                        | (28,163 | ) |      | $ | (35,079 | )
|Adjustments to reconcile net loss to net cash used in operating activities: |  |                          |         |   |      |   |         |  
|Depreciation and amortization                                               |  |                          | 4,960   |   |      |   | 3,911   |  
|Stock-based compensation                                                    |  |                          | 2,779   |   |      |   | 757     |  
|Stock-based 401(k) plan employer match                                      |  |                          | 184     |   |      |   | 286     |  
|Non-cash interest income                                                    |  |                          | 412     |   |      |   | 1,605   |  
|Gain on extinguishment of debt                                              |  |                          |        |   |      |   | (1,408  | )
|Minority interest in subsidiary loss                                        |  |                          | (339    | ) |      |   | (1,543  | )
|Changes in assets and liabilities:                                          |  |                          |         |   |      |   |         |  
|Income taxes receivable                                                     |  |                          | 291     |   |      |   | 285     |  
|Inventory                                                                   |  |                          | (3,335  | ) |      |   | (2,286  | )
|Accounts receivable                                                         |  |                          | (2,787  | ) |      |   | (1,991  | )
|Prepaid expenses                                                            |  |                          | (2,342  | ) |      |   | (110    | )
|Intangible and other assets, net                                            |  |                          | (137    | ) |      |   | (134    | )
|Accounts payable                                                            |  |                          | (260    | ) |      |   | 2,559   |  
|Accrued expenses                                                            |  |                          | 1,588   |   |      |   | 3,620   |  
|Accrued payroll and related items                                           |  |                          | (308    | ) |      |   | (787    | )
|Interest payable                                                            |  |                          |        |   |      |   | (344    | )
|Current portion of deferred revenue                                         |  |                          | (2,224  | ) |      |   | 1,075   |  
|Other current liabilities                                                   |  |                          | (596    | ) |      |   | (499    | )
|Long-term liabilities                                                       |  |                          | 50      |   |      |   |        |  
|Deferred revenue, net of current portion                                    |  |                          | (1,900  | ) |      |   |        |  
|                                                                            |  |                          |         |   |      |   |         |  
|Net cash used in operating activities                                       |  |                          | (32,127 | ) |      |   | (30,083 | )
|                                                                            |  |                          |         |   |      |   |         |  
|Cash flows from investing activities:                                       |  |                          |         |   |      |   |         |  
|Acquisitions of property and equipment                                      |  |                          | (639    | ) |      |   | (7,105  | )
|Proceeds from sale of fixed assets                                          |  |                          | 110     |   |      |   | 118     |  
|Payments for intangible assets                                              |  |                          | (5      | ) |      |   | (5      | )
|Purchases of short-term investments                                         |  |                          | (16,445 | ) |      |   | (10,045 | )
|Proceeds from sales of short-term investments                               |  |                          | 4,771   |   |      |   | 9,709   |  
|Proceeds from maturities of short-term investments                          |  |                          | 7,184   |   |      |   | 73,362  |  
|Purchases of marketable securities                                          |  |                          | (10,711 | ) |      |   | (38,526 | )
|Proceeds from sales of marketable securities                                |  |                          | 11,474  |   |      |   | 17,213  |  
|Proceeds from maturities of marketable securities                           |  |                          | 42,394  |   |      |   | 47,692  |  
|                                                                            |  |                          |         |   |      |   |         |  
|Net cash provided by investing activities                                   |  |                          | 38,133  |   |      |   | 92,413  |  
|                                                                            |  |                          |         |   |      |   |         |  
|Cash flows from financing activities:                                       |  |                          |         |   |      |   |         |  
|Proceeds from exercise of stock options                                     |  |                          | 657     |   |      |   | 265     |  
|Payment for extinguishment of debt                                          |  |                          |        |   |      |   | (12,422 | )
|                                                                            |  |                          |         |   |      |   |         |  
|Net cash provided by (used in) financing activities                         |  |                          | 657     |   |      |   | (12,157 | )
|                                                                            |  |                          |         |   |      |   |         |  
|Net increase in cash and cash equivalents                                   |  |                          | 6,663   |   |      |   | 50,173  |  
|Cash and cash equivalents, beginning of period                              |  |                          | 20,757  |   |      |   | 23,849  |  
|                                                                            |  |                          |         |   |      |   |         |  
|Cash and cash equivalents, end of period                                    |  | $                        | 27,420  |   |      | $ | 74,022  |  
|                                                                            |  |                          |         |   |      |   |         |  
|Supplemental cash flow information:                                         |  |                          |         |   |      |   |         |  
|Interest paid                                                               |  | $                        | 4,252   |   |      | $ | 6,362   |  
|                                                                            |  |                          |         |   |      |   |         |  
|Income tax benefit payments received, net of payments made                  |  | $                        | 860     |   |      | $ | 523     |  
|                                                                            |  |                          |         |   |      |   |         |  
|Acquisition/construction of property and equipment, unpaid at end of period |  | $                        | 82      |   |      | $ | 894     |  
|                                                                            |  |                          |         |   |      |   |         |  
|Transfer of inventory to (from) property and equipment                      |  | $                        | 193     |   |      | $ | (556    | )
|                                                                            |  |                          |         |   |      |   |         |  

See accompanying notes to condensed consolidated financial statements



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##### Table of Contents

CURAGEN CORPORATION AND SUBSIDIARY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Basis of Presentation and
Reclassifications

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with
accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes
required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of our management, the accompanying unaudited condensed consolidated financial statements include all adjustments,
consisting of only normal recurring accruals, necessary to present fairly our consolidated financial position, results of operations and cash flows. Interim results are not necessarily indicative of the results that may be expected for the entire
year. The condensed consolidated financial statements of CuraGen Corporation and subsidiary (the Company) include CuraGen Corporation (CuraGen) and its majority-owned subsidiary, 454 Life Sciences Corporation
(454), and accordingly, all material intercompany balances and transactions have been eliminated.

The Company has determined
that acquisitions of property and equipment on account, which were previously reported as components of changes in operating assets and liabilities and purchases of property and equipment, should not have been reported in the statements of cash
flows. Therefore, the condensed consolidated statement of cash flows for the six months ended June 30, 2005 has been revised to reflect a decrease in cash flows used in operating activities with a corresponding decrease in cash flows provided
by investing activities of $0.3 million. Purchases of property and equipment acquired on account have now been presented as supplemental disclosure of non-cash items. In addition, the Company also revised the condensed consolidated statement for the
six months ended June 30, 2005 to reflect non-cash interest income of $1.6 million in the cash flows used in operating activities, and to separately report gross inflows and outflows from purchases, maturities and sales of short-term
investments and marketable securities in the cash flows provided by investing activities. These revisions had no effect on the Companys net income or the increase in cash and cash equivalents reported.

The 2005 condensed consolidated financial statements have been reclassified to conform to the classifications used in 2006. All dollar amounts herein are
shown in thousands, except par value and per share data.

The accompanying condensed consolidated financial statements should be read in
conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2005.

2. Comprehensive Loss

The accumulated balance of other comprehensive income (loss) is disclosed as a
separate component of stockholders equity and represents unrealized gains and losses on short-term investments and marketable securities. A summary of total comprehensive loss is as follows:



|                                                                     |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|-------------------------------------------------------------------- |  | -------------------------- | ------- | - | ------------------------ | - | ------- | ---- |  | - | ------- | - |  | - | ------- | -
|                                                                     |  | Three Months EndedJune 30, |         |   | Six Months EndedJune 30, |  
|                                                                     |  | 2006                       |         |   | 2005                     |   |         | 2006 |  |   | 2005    |  
|Net loss                                                             |  | $                          | (14,299 | ) |                          | $ | (15,680 | )    |  | $ | (28,163 | ) |  | $ | (35,079 | )
|                                                                     |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Other comprehensive loss:                                            |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Unrealized gains (losses) on securities:                             |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Unrealized holding gains (losses) arising during period              |  |                            | 2,749   |   |                          |   | 1,000   |      |  |   | 2,873   |   |  |   | (548    | )
|Reclassification adjustment for realized losses included in net loss |  |                            | 9       |   |                          |   | 34      |      |  |   | 13      |   |  |   | 64      |  
|                                                                     |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Net unrealized gains (losses) on securities                          |  |                            | 2,758   |   |                          |   | 1,034   |      |  |   | 2,886   |   |  |   | (484    | )
|                                                                     |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  
|Total comprehensive loss                                             |  | $                          | (11,541 | ) |                          | $ | (14,646 | )    |  | $ | (25,277 | ) |  | $ | (35,563 | )
|                                                                     |  |                            |         |   |                          |   |         |      |  |   |         |   |  |   |         |  

The Company periodically reviews its investment portfolios and its investment in TopoTarget A/S
(TopoTarget), a publicly traded company on the Copenhagen Stock Exchange, to determine if there is an impairment that is other than temporary, and as of the balance sheet date, has not experienced any impairments in its investments that
were other than temporary. In evaluating whether the individual investments in the investment portfolio are other than temporarily impaired, the Company considers the credit rating of the



6



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##### Table of Contents

individual securities, the cause of the impairment of the individual securities which is generally related to interest rate increases, and the severity of
the impairment of the individual securities. In order for an individual investment to be impaired, the cause and severity of the impairment must be equal to or more than 5% of the book value of the investment.

The Company regularly evaluates the carrying value of its investment in TopoTarget by considering the market value of the stock of TopoTarget. This
investment is classified as an available-for-sale long-term marketable security and is included in intangible and other assets, net, on the June 30, 2006 balance sheet at a fair value of $8,694 which includes an unrealized gain of $3,406.

3. Stock-Based Compensation

The
Company adopted Statement of Financial Accounting Standards No. 123 (revised 2004), Share-Based Payment (SFAS 123R), effective January 1, 2006. SFAS 123R requires recognition of the fair value of stock-based
compensation in net earnings. Previously Statement of Financial Accounting Standards No. 123, Accounting for Stock-Based Compensation (SFAS 123) required only expanded disclosures of stock-based compensation arrangements
with employees, and encouraged (but did not require) compensation cost to be measured based on the fair value of the equity instruments awarded. Companies were permitted to continue to apply Accounting Principles Board Opinion No. 25,
Accounting for Stock Issued to Employees (APB 25) for equity instruments awarded to employees, which recognized compensation cost based on the intrinsic value of the equity instruments awarded. The Company continued to apply
APB 25 for purposes of its stock-based compensation awards to employees through December 31, 2005, and accordingly recorded no compensation expense for option grants unless the option grants had an exercise price less than the fair market value
of the underlying stock at the date of grant.

CuraGen has one active stock-based compensation plan, the 1997 Employee, Director and
Consultant Stock Plan (1997 Stock Plan) and one inactive stock-based compensation plan, the 1993 Stock Option and Incentive Award Plan (1993 Stock Plan), and 454 has one active stock-based compensation plan, the 2006 Equity
Incentive Plan (454 2006 Stock Plan) and one inactive stock-based compensation plan, the 2000 Employee, Director and Consultant Stock Plan (454 2000 Stock Plan). The 454 2006 Stock Plan was approved by the stockholders of 454
effective May 22, 2006. Under the active plans, restricted stock, stock options and other stock-related awards may be granted to directors, officers, employees and consultants or advisors of CuraGen and 454, respectively. No future awards may
be granted under the inactive plans subsequent to the adoption of the new active plan. To date, stock-based compensation issued under the plans has consisted of incentive and non-qualified stock options and restricted stock. Generally, stock options
are granted to employees at exercise prices equal to the respective fair market values of the common stock of CuraGen and 454, at the dates of grant, and have terms of 10 years. The Company recognizes stock-based compensation expense for stock
option grants over the requisite service period of the individual stock option grants, which equals the vesting period. Generally, stock option grants to employees fully vest between three to five years from the grant date. Each of CuraGen and 454
issue new shares upon the exercise of their respective stock options.

The Company has transitioned to fair-value-based accounting for
stock-based compensation under SFAS 123R using a modified version of the prospective application (modified prospective application). Under modified prospective application, restatement of prior financial statements is not required;
however, SFAS 123R applies to new awards and to awards modified, repurchased, or cancelled on or after January 1, 2006. Additionally, compensation cost for the portion of awards for which the requisite service has not been rendered (generally
referring to unvested awards) that are outstanding as of January 1, 2006, is recognized as the remaining requisite service is rendered after January 1, 2006.

The attribution of compensation cost for purposes of the pro forma disclosures required under SFAS 123 prior to January 1, 2006, was calculated on a straight-line basis over the requisite service period for each
separately vesting portion of an award as if the awards were in-substance, multiple awards, which resulted in an acceleration of compensation cost. However, effective with the adoption of SFAS 123R, the Company is recording compensation cost for new
awards on a straight-line basis over the requisite service period for the entire award.

In addition, the Company estimated forfeitures
when calculating compensation expense for SFAS 123 pro forma disclosures, and adjusted the estimate of forfeitures over the requisite service period based on the extent to which actual forfeitures differed from such estimates. Changes in estimated
forfeitures were recognized through a cumulative true-up adjustment in the period of change and also impacted the amount of compensation



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##### Table of Contents

expense to be recognized in future periods. The Company will continue to use this methodology after the adoption of SFAS 123R. With respect to accounting for
the compensation expense related to restricted stock awards, the Company previously recognized forfeitures as they occurred. However, effective with the adoption of SFAS 123R, the Company now estimates forfeitures for purposes of calculating
compensation expense related to restricted stock. The impact on previously reported compensation expense related to restricted stock where forfeitures were recognized as incurred was not material.

Prior to the adoption of SFAS 123R, the Company used the Black-Scholes option valuation model to estimate the fair value of stock options granted to
employees for purposes of SFAS 123 disclosure. Upon the adoption of SFAS 123R, the Company continues to use the Black-Scholes option valuation model for purposes of valuing all new awards and awards modified, repurchased or cancelled on or after
January 1, 2006.

Historically, CuraGen has used the following methods to determine the factors input into the Black-Scholes model:
historical volatility is used to determine the expected stock price volatility factor; risk-free interest rates are based on the U.S. Treasury yield curve in effect at the time of grant, for the period corresponding to the approximate expected term
of the options; and the expected term of the options has been calculated using CuraGens historical exercise patterns to estimate future exercise patterns. Effective with the adoption of SFAS 123R, CuraGen continues to utilize the same
methodology for purposes of estimating the expected stock price volatility and the risk-free interest rates, however, for purposes of estimating the expected term, CuraGen uses the simplified approach as outlined in Staff Accounting Bulletin
No. 107 (Topic 14) (SAB 107), whereby the expected term is equal to the average of the vesting term and the contractual term.

Historically, 454 has used the following methods to determine the factors input into the Black-Scholes model: the volatilities of similar entities with publicly traded stock, adjusted for not being public, to determine the expected stock
price volatility of 454s non-public stock; risk-free interest rates are based on the U.S. Treasury yield curve in effect at the time of grant, for the period corresponding to the approximate expected term of the options; and the expected term
of the options has been calculated using 454s historical exercise patterns to estimate future exercise patterns. Effective with the adoption of SFAS 123R, 454 continues to utilize the same methodology for purposes of estimating the expected
stock price volatility and the risk-free interest rates, however, for purposes of estimating the expected term, 454 uses the simplified approach as outlined in SAB 107, whereby the expected term is equal to the average of the vesting term and the
contractual term.

For purposes of restricted stock grants, the grant date fair value is calculated as the fair market value of the stock
on the date of grant less the purchase price of the restricted stock paid by the grantee, which is equal to the $.01 par value of the stock. CuraGen recognizes stock-based compensation expense for restricted stock grants over the requisite service
period of the individual grants, which equals the vesting period. Generally, restricted stock grants to employees fully vest between two to three years from the grant date. CuraGen issues new shares to satisfy grants of restricted stock.

SFAS 123R requires the presentation of pro forma information for periods prior to the adoption as if the Company had accounted for all stock-based
compensation under the fair value method. For purposes of pro forma disclosure, the estimated fair value of the options at the date of grant is amortized to expense over the requisite service period, which equals the vesting period. Employee
stock-based compensation shown below includes the amortization of restricted stock compensation expense recorded in the statements of operations during the period presented. The following table illustrates the effect on net loss and earnings per
share as if the fair value recognition provisions had been applied to the Companys employee stock-based compensation.



|                                                                                                            |  |                                 |         |   |                               |   |         |  
|----------------------------------------------------------------------------------------------------------- |  | ------------------------------- | ------- | - | ----------------------------- | - | ------- | -
|                                                                                                            |  | Three Months EndedJune 30, 2005 |         |   | Six Months EndedJune 30, 2005 |  
|Net loss, as reported                                                                                       |  | $                               | (15,680 | ) |                               | $ | (35,079 | )
|Employee stock-based compensation expense included in net loss                                              |  |                                 | 420     |   |                               |   | 733     |  
|Total employee stock-based compensation expense determined under the fair-value based method for all awards |  |                                 | (1,368  | ) |                               |   | (2,390  | )
|                                                                                                            |  |                                 |         |   |                               |   |         |  
|Pro forma net loss                                                                                          |  | $                               | (16,628 | ) |                               | $ | (36,736 | )
|                                                                                                            |  |                                 |         |   |                               |   |         |  
|Basic and diluted net loss per share:                                                                       |  |                                 |         |   |                               |   |         |  
|As reported                                                                                                 |  | $                               | (0.31   | ) |                               | $ | (0.70   | )
|Pro forma                                                                                                   |  | $                               | (0.33   | ) |                               | $ | (0.73   | )



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##### Table of Contents

Upon adoption of SFAS 123R, the Company recognizes the compensation expense associated with stock options
granted to employees after December 31, 2005, and the unvested portion of previously granted employee stock option awards that were outstanding as of December 31, 2005, in the condensed consolidated statements of operations. During the
three and six months ended June 30, 2006, the Company recognized compensation expense of $970 and $1,586 in the condensed consolidated statements of operations with respect to employee stock options. As of June 30, 2006 the Company had
capitalized compensation expense for employee stock options of $9 into inventory. During the three and six months ended June 30, 2006, the Company also recognized compensation expense of $565 and $1,301 in the condensed consolidated statements
of operations with respect to restricted stock grants. Due to the CuraGen and 454 net loss positions, no tax benefit was recorded during the period. Upon the adoption of SFAS 123R on January 1, 2006, the Company reversed the $3,016 balance in
the unamortized stock-based compensation account to additional paid-in-capital in accordance with SFAS 123R. Compensation expense related to the shares of restricted stock will be recognized in the Companys statements of operations over the
vesting periods.

For the three and six months ended June 30, 2006, the adoption of SFAS 123R had the following effect on amounts that
would have been reported using the intrinsic value method under APB 25:



|                                                                        |  |                                  |         |   |                      |   |        |            |  |   |         |  
|----------------------------------------------------------------------- |  | -------------------------------- | ------- | - | -------------------- | - | ------ | ---------- |  | - | ------- | -
|                                                                        |  | Three Months Ended June 30, 2006 |        
|                                                                        |  | Using APB 25Accounting           |         |   | SFAS 123RAdjustments |   |        | AsReported | 
|Loss before income tax benefit and minority interest in subsidiary loss |  | $                                | (13,631 | ) |                      | $ | (970   | )          |  | $ | (14,601 | )
|Net loss                                                                |  | $                                | (13,394 | ) |                      | $ | (905   | )          |  | $ | (14,299 | )
|Basic and diluted net loss per share                                    |  | $                                | (0.24   | ) |                      | $ | (0.02  | )          |  | $ | (0.26   | )
|                                                                        | 
|                                                                        |  | Six Months Ended June 30, 2006   |        
|                                                                        |  | Using APB 25Accounting           |         |   | SFAS 123RAdjustments |   |        | AsReported | 
|Loss before income tax benefit and minority interest in subsidiary loss |  | $                                | (27,025 | ) |                      | $ | (1,586 | )          |  | $ | (28,611 | )
|Net loss                                                                |  | $                                | (26,694 | ) |                      | $ | (1,469 | )          |  | $ | (28,163 | )
|Basic and diluted net loss per share                                    |  | $                                | (0.49   | ) |                      | $ | (0.02  | )          |  | $ | (0.51   | )

The fair value of options granted during the three months ended June 30, 2006 and 2005 were
estimated as of the grant date using the Black-Scholes option valuation model with the following assumptions:



|                                          |  |                            |   |  |      |  
|----------------------------------------- |  | -------------------------- | - |  | ---- | -
|                                          |  | Three Months EndedJune 30, |  
|                                          |  | 2006                       |   |  | 2005 |  
|Expected stock price volatility - CuraGen |  | 79                         | % |  | 81   | %
|Expected stock price volatility - 454     |  | 22                         | % |  | 33   | %
|                                          |  |                           
|Risk-free interest rate - CuraGen         |  | 4.33                       | % |  | 3.43 | %
|Risk-free interest rate - 454             |  | 4.33                       | % |  | 3.87 | %
|                                          |  |                           
|Expected option term in years - CuraGen   |  | 6.25                       |   |  | 4.85 |  
|Expected option term in years - 454       |  | 6.25                       |   |  | 7.93 |  
|                                          |  |                           
|Expected dividend yield - CuraGen and 454 |  | 0                          | % |  | 0    | %

The approximate weighted-average grant date fair values using the Black-Scholes option valuation
model of all stock options granted during the three and six months ended June 30, 2006 and 2005 were as follows:



|        |  |                            |      |                          |   |      |  |      |      |  |   |     
|------- |  | -------------------------- | ---- | ------------------------ | - | ---- |  | ---- | ---- |  | - | ----
|        |  | Three Months EndedJune 30, |      | Six Months EndedJune 30,
|        |  | 2006                       |      | 2005                     |   | 2006 |  | 2005
|CuraGen |  | $                          | 2.76 |                          | $ | 2.32 |  | $    | 2.90 |  | $ | 3.62
|454     |  | $                          | 1.24 |                          | $ | 1.26 |  | $    | 1.40 |  | $ | 1.17



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A summary of the stock option activity under the 1993 Stock Plan as of June 30, 2006, and changes
during the three months ended June 30, 2006, are as follows:



|                          |  |                  |   |  |                                |      |                                                    |      |                          |   |  
|------------------------- |  | ---------------- | - |  | ------------------------------ | ---- | -------------------------------------------------- | ---- | ------------------------ | - | -
|                          |  | Numberof Options |   |  | Weighted Average ExercisePrice |      | WeightedAverageRemainingContractual Life(in years) |      | AggregateIntrinsic Value
|Outstanding April 1, 2006 |  | 222,064          |   |  | $                              | 2.91 |                                                    |      |                          |   |  
|Granted                   |  |                 |   |  |                                |      |                                                    |      |                          |   |  
|Exercised                 |  | (126,000         | ) |  |                                | 1.84 |                                                    |      |                          |   |  
|Canceled or lapsed        |  |                 |   |  |                                |      |                                                    |      |                          |   |  
|                          |  |                  |   |  |                                |      |                                                    |      |                          |   |  
|Outstanding June 30, 2006 |  | 96,064           |   |  |                                | 4.31 |                                                    | 1.13 |                          | $ | 5
|                          |  |                  |   |  |                                |      |                                                    |      |                          |   |  
|Exercisable June 30, 2006 |  | 96,064           |   |  |                                | 4.31 |                                                    | 1.13 |                          | $ | 5
|                          |  |                  |   |  |                                |      |                                                    |      |                          |   |  

The total intrinsic value of options exercised under the 1993 Stock Plan during the three months
ended June 30, 2006 and 2005 was $253 and $28, respectively, and during the six months ended June 30, 2006 and 2005 was $253 and $85, respectively.

The following table presents weighted average price information about significant option groups under the 1993 Stock Plan exercisable at June 30, 2006:



|                         |  |                             |  |                                |     
|------------------------ |  | --------------------------- |  | ------------------------------ | ----
|Range of Exercise Prices |  | Number ofOptionsExercisable |  | WeightedAverage Exercise Price
|$1.50                    |  | 2,400                       |  | $                              | 1.50
|3.75 - 5.00              |  | 93,664                      |  |                                | 4.38
|                         |  |                             |  |                                |     
|                         |  | 96,064                      |  |                                | 4.31
|                         |  |                             |  |                                |     

A summary of the stock option activity under the 1997 Stock Plan as of June 30, 2006, and
changes during the three months ended June 30, 2006, are as follows:



|                          |  |                   |   |  |                               |       |                                                    |      |                         |   |    
|------------------------- |  | ----------------- | - |  | ----------------------------- | ----- | -------------------------------------------------- | ---- | ----------------------- | - | ---
|                          |  | Number of Options |   |  | WeightedAverageExercise Price |       | WeightedAverageRemainingContractual Life(in years) |      | AggregateIntrinsicValue
|Outstanding April 1, 2006 |  | 6,293,220         |   |  | $                             | 9.98  |                                                    |      |                         |   |    
|Granted                   |  | 122,500           |   |  |                               | 3.85  |                                                    |      |                         |   |    
|Exercised                 |  | (34,000           | ) |  |                               | 3.07  |                                                    |      |                         |   |    
|Canceled or lapsed        |  | (44,525           | ) |  |                               | 4.87  |                                                    |      |                         |   |    
|                          |  |                   |   |  |                               |       |                                                    |      |                         |   |    
|Outstanding June 30, 2006 |  | 6,337,195         |   |  |                               | 9.93  |                                                    | 6.45 |                         | $ | 128
|                          |  |                   |   |  |                               |       |                                                    |      |                         |   |    
|Exercisable June 30, 2006 |  | 3,764,788         |   |  |                               | 13.03 |                                                    | 4.95 |                         | $ | 125
|                          |  |                   |   |  |                               |       |                                                    |      |                         |   |    

The total intrinsic value of options exercised under the 1997 Stock Plan during the three months
ended June 30, 2006 and 2005 was $18 and $3, respectively, and during the six months ended June 30, 2006 and 2005 was $22 and $31.



10



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The following table presents weighted average price information about significant option groups under the
1997 Stock Plan exercisable at June 30, 2006:



|                         |  |                              |  |                                 |      
|------------------------ |  | ---------------------------- |  | ------------------------------- | -----
|Range of Exercise Prices |  | Number of OptionsExercisable |  | Weighted Average Exercise Price
|$2.565-3.780             |  | 496,049                      |  | $                               | 3.25 
|3.850-5.031              |  | 864,159                      |  |                                 | 4.23 
|5.090-5.970              |  | 846,444                      |  |                                 | 5.73 
|6.000-8.710              |  | 501,634                      |  |                                 | 8.09 
|15.830-22.500            |  | 341,800                      |  |                                 | 16.76
|24.938-31.660            |  | 328,335                      |  |                                 | 26.91
|41.125-58.334            |  | 386,367                      |  |                                 | 52.54
|                         |  |                              |  |                                 |      
|                         |  | 3,764,788                    |  |                                 | 13.03
|                         |  |                              |  |                                 |      

A summary of all stock option activity under the 454 2000 Stock Plan as of June 30, 2006, and
changes during the three months ended June 30, 2006, was as follows:



|                           |  |                   |   |  |                              |      |                                                    |      |                         |   |      
|-------------------------- |  | ----------------- | - |  | ---------------------------- | ---- | -------------------------------------------------- | ---- | ----------------------- | - | -----
|                           |  | Number of Options |   |  | WeightedAverageExercisePrice |      | WeightedAverageRemainingContractual Life(in years) |      | AggregateIntrinsicValue
|Outstanding, April 1, 2006 |  | 4,695,201         |   |  | $                            | 2.68 |                                                    |      |                         |   |      
|Granted                    |  | 34,500            |   |  |                              | 3.75 |                                                    |      |                         |   |      
|Exercised                  |  |                  |   |  |                              |     |                                                    |      |                         |   |      
|Canceled or lapsed         |  | (38,350           | ) |  |                              | 2.65 |                                                    |      |                         |   |      
|                           |  |                   |   |  |                              |      |                                                    |      |                         |   |      
|Outstanding, June 30, 2006 |  | 4,691,351         |   |  |                              | 2.69 |                                                    | 6.26 |                         | $ | 4,962
|                           |  |                   |   |  |                              |      |                                                    |      |                         |   |      
|Exercisable, June 30, 2006 |  | 2,857,284         |   |  |                              | 2.50 |                                                    | 4.79 |                         | $ | 3,577
|                           |  |                   |   |  |                              |      |                                                    |      |                         |   |      

The total intrinsic value of options exercised during the three months ended June 30, 2005
was $1. There were no options exercised during the three months ended June 30, 2006. The total intrinsic value of options exercised during the six months ended June 30, 2006 and 2005 was $118 and $1.

The following table presents weighted average price information about significant option groups under the 454 2000 Stock Plan exercisable at
June 30, 2006:



|                         |  |                              |  |                                |     
|------------------------ |  | ---------------------------- |  | ------------------------------ | ----
|Range of Exercise Prices |  | Number of OptionsExercisable |  | Weighted AverageExercise Price
|$1.25                    |  | 81,000                       |  | $                              | 1.25
|2.50                     |  | 2,610,884                    |  |                                | 2.50
|2.75                     |  | 35,400                       |  |                                | 2.75
|3.00                     |  | 100,000                      |  |                                | 3.00
|3.75                     |  | 30,000                       |  |                                | 3.75
|                         |  |                              |  |                                |     
|                         |  | 2,857,284                    |  |                                | 2.50
|                         |  |                              |  |                                |     

The 454 2006 Stock Plan was approved as of May 22, 2006, and through June 30, 2006 there
was no activity to date under the 454 2006 Stock Plan.

As of June 30, 2006 there was $4,633 of total unrecognized compensation
expense related to unvested stock option grants under the 1993 Stock Plan, 1997 Stock Plan, 454 2000 Stock Plan and 454 2006 Stock Plan. This expense is expected to be recognized over a weighted-average period of 1.89 years.



11



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##### Table of Contents

A summary of all restricted stock activity under the 1997 Stock Plan as of June 30, 2006, and
changes during the three months ended June 30, 2006, are as follows:



|                                      |  |                                     |   |  |                                        |     
|------------------------------------- |  | ----------------------------------- | - |  | -------------------------------------- | ----
|                                      |  | Number of Sharesof Restricted Stock |   |  | Weighted Average Grant Date Fair Value
|Outstanding April 1, 2006             |  | 1,326,945                           |   |  | $                                      | 4.64
|Granted                               |  |                                    |   |  |                                        |    
|Restrictions lapsed                   |  | (100,000                            | ) |  |                                        | 3.43
|Repurchased upon employee termination |  | (8,125                              | ) |  |                                        | 4.95
|                                      |  |                                     |   |  |                                        |     
|Outstanding June 30, 2006             |  | 1,218,820                           |   |  |                                        | 4.73
|                                      |  |                                     |   |  |                                        |     

The total fair value of restricted shares vested during the three months ended June 30, 2006
was $384. There were no restricted shares that vested during the three months ended June 30, 2005. The total intrinsic value of restricted shares vested during the six months ended June 30, 2006 was $416. There were no restricted shares
that vested during the six months ended June 30, 2005.

As of June 30, 2006, there was $2,871 of total unrecognized compensation
expense related to unvested restricted stock grants under the 1997 Stock Plan. This expense is expected to be recognized over a weighted-average period of 1.33 years.

4. Restructuring and Related Charges

In June 2003, CuraGen announced a restructuring plan intended
to focus resources on continuing to advance its pipeline of protein, antibody, and small molecule therapeutics into preclinical and clinical development. In connection with the June 2003 restructuring plan, a charge of $2,888 was recorded in the
second quarter of 2003, including $1,742 related to employee separation costs, $1,046 of operating lease obligations and $100 of asset impairment costs. The cash requirements under the June 2003 restructuring plan were $2,681, of which $2,398 was
paid prior to June 30, 2006. The remaining cash requirements of $283 will be paid through 2008 and relate to remaining lease payments.

In September 2005, CuraGen underwent a corporate restructuring to focus on advancing its therapeutic pipeline through clinical development. In connection with the September 2005 restructuring plan, a charge of $1,280 was recorded in the
third quarter of 2005, including $1,111 related to employee separation costs, $130 of operating lease obligations and $39 of asset impairment costs. The cash requirements under the September 2005 restructuring plan were $1,057, all of which was paid
prior to June 30, 2006.

In November 2005, CuraGen underwent a corporate restructuring to focus on advancing its therapeutic pipeline
through clinical development. In connection with the November 2005 restructuring plan, a charge of $1,537 was recorded in the fourth quarter of 2005, including $1,396 of operating lease obligations and $141 of asset impairment costs. The cash
requirements under the November 2005 restructuring plan were $1,396, of which $489 was paid prior to June 30, 2006. The remaining cash requirements of $907 will be paid through 2007 and relate to remaining lease payments.

5. Segment Reporting

The Company currently operates
in two business segments: CuraGen and 454. CuraGen is a biopharmaceutical development company dedicated to improving the lives of patients by developing novel protein, antibody and small molecule therapeutics in the areas of oncology, inflammatory
diseases, and diabetes. 454, CuraGens majority-owned subsidiary, has commercialized advanced instruments and related technologies for sequencing DNA. The operations of 454 are run by a separate management team and governed by a separate Board
of Directors made up of members of CuraGens management team and Board of Directors.

The following table sets forth a comparison of
balance sheet items by segment at June 30, 2006 and December 31, 2005:



|                          |  |              |         |   |                  |   |         |  
|------------------------- |  | ------------ | ------- | - | ---------------- | - | ------- | -
|                          |  | June 30,2006 |         |   | December 31,2005 |  
|Cash and investments:     |  |              |         |   |                  |   |         |  
|CuraGen                   |  | $            | 187,032 |   |                  | $ | 211,238 |  
|454                       |  |              | 6,562   |   |                  |   | 15,290  |  
|                          |  |              |         |   |                  |   |         |  
|Total                     |  | $            | 193,594 |   |                  | $ | 226,528 |  
|                          |  |              |         |   |                  |   |         |  
|Total assets:             |  |              |         |   |                  |   |         |  
|CuraGen                   |  | $            | 223,494 |   |                  | $ | 247,493 |  
|454                       |  |              | 27,841  |   |                  |   | 30,119  |  
|Intercompany eliminations |  |              | (6,543  | ) |                  |   | (7,155  | )
|                          |  |              |         |   |                  |   |         |  
|Total                     |  | $            | 244,792 |   |                  | $ | 270,457 |  
|                          |  |              |         |   |                  |   |         |  



12



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##### Table of Contents

The following table sets forth a comparison of income statement items by segment for the three and six
month periods ended June 30, 2006 and 2005:



|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|------------------------------------ |  | -------------------------- | ------ | - | ------------------------ | - | ------ | ---- |  | - | ------ | - |  | - | ------ | -
|                                     |  | Three Months EndedJune 30, |        |   | Six Months EndedJune 30, |  
|                                     |  | 2006                       |        |   | 2005                     |   |        | 2006 |  |   | 2005   |  
|Revenues:                            |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|CuraGen                              |  | $                          | 982    |   |                          | $ | 1,067  |      |  | $ | 2,522  |   |  | $ | 2,451  |  
|454                                  |  |                            | 9,796  |   |                          |   | 3,404  |      |  |   | 18,547 |   |  |   | 5,566  |  
|Intercompany eliminations            |  |                            | (116   | ) |                          |   | (181   | )    |  |   | (238   | ) |  |   | (297   | )
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Total                                |  | $                          | 10,662 |   |                          | $ | 4,290  |      |  | $ | 20,831 |   |  | $ | 7,720  |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Operating expenses:                  |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|CuraGen                              |  | $                          | 14,405 |   |                          | $ | 15,961 |      |  | $ | 29,178 |   |  | $ | 33,792 |  
|454                                  |  |                            | 10,602 |   |                          |   | 5,279  |      |  |   | 19,758 |   |  |   | 10,119 |  
|Intercompany eliminations            |  |                            | (116   | ) |                          |   | (181   | )    |  |   | (238   | ) |  |   | (297   | )
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Total                                |  | $                          | 24,891 |   |                          | $ | 21,059 |      |  | $ | 48,698 |   |  | $ | 43,614 |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Net loss:                            |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|CuraGen                              |  | $                          | 13,835 |   |                          | $ | 14,461 |      |  | $ | 27,522 |   |  | $ | 32,121 |  
|454                                  |  |                            | 711    |   |                          |   | 1,855  |      |  |   | 980    |   |  |   | 4,501  |  
|Minority interest in subsidiary loss |  |                            | (247   | ) |                          |   | (636   | )    |  |   | (339   | ) |  |   | (1,543 | )
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Total                                |  | $                          | 14,299 |   |                          | $ | 15,680 |      |  | $ | 28,163 |   |  | $ | 35,079 |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Capital expenditures:                |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|CuraGen                              |  | $                          | 50     |   |                          | $ | 4,001  |      |  | $ | 145    |   |  | $ | 6,706  |  
|454                                  |  |                            | 212    |   |                          |   | 127    |      |  |   | 517    |   |  |   | 401    |  
|Intercompany eliminations            |  |                            | (2     | ) |                          |   |       |      |  |   | (23    | ) |  |   | (2     | )
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Total                                |  | $                          | 260    |   |                          | $ | 4,128  |      |  | $ | 639    |   |  | $ | 7,105  |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Depreciation and amortization:       |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|CuraGen                              |  | $                          | 1,776  |   |                          | $ | 1,316  |      |  | $ | 3,708  |   |  | $ | 2,718  |  
|454                                  |  |                            | 619    |   |                          |   | 594    |      |  |   | 1,252  |   |  |   | 1,193  |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  
|Total                                |  | $                          | 2,395  |   |                          | $ | 1,910  |      |  | $ | 4,960  |   |  | $ | 3,911  |  
|                                     |  |                            |        |   |                          |   |        |      |  |   |        |   |  |   |        |  

6. Inventory

A summary of inventory is as follows:



|                |  |              |       |                   |   |      
|--------------- |  | ------------ | ----- | ----------------- | - | -----
|                |  | June 30,2006 |       | December 31, 2005
|Raw material    |  | $            | 3,723 |                   | $ | 2,098
|Work in process |  |              | 1,252 |                   |   | 1,336
|Finished goods  |  |              | 2,270 |                   |   | 669  
|                |  |              |       |                   |   |      
|Total           |  | $            | 7,245 |                   | $ | 4,103
|                |  |              |       |                   |   |      

During the second quarter of 2006, 454 transferred $193 of laboratory equipment from inventory to
property and equipment to be used in 454s research and development facility and fee for service facility. This equipment has been placed in service and is being depreciated on a straight-line basis, consistent with the Companys property
and equipment policy.

7. Loss Per Share

Basic loss per share (LPS) is computed by dividing net loss by the weighted average number of shares of common stock outstanding for the period, excluding unvested restricted stock. Diluted LPS reflects the potential dilution
that could occur if options or other contracts to issue common stock were exercised or converted into common stock. Convertible subordinated debt, stock options granted under CuraGens stock option plans but not yet exercised and unvested
restricted stock are anti-dilutive and therefore not considered for the diluted LPS calculations. Anti-dilutive potential common shares, consisting of convertible subordinated debt, outstanding stock options and unvested restricted stock are
20,046,407 and 20,122,149 at June 30, 2006 and 2005, respectively.



13



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##### Table of Contents

CURAGEN CORPORATION AND SUBSIDIARY

Item 2. Managements Discussion and Analysis of Financial Condition and Results of Operations

This
Managements Discussion and Analysis of Financial Condition and Results of Operations as of June 30, 2006 and for the three and six month periods ended June 30, 2006 and 2005 should be read in conjunction with the sections of our
audited consolidated financial statements and notes thereto as well as our Managements Discussion and Analysis of Financial Condition and Results of Operations that are included in our Annual Report on Form 10-K for the year ended
December 31, 2005.

Overview

We
are a biopharmaceutical development company dedicated to improving the lives of patients by developing novel protein, antibody and small molecule therapeutics in the areas of oncology, inflammatory diseases, and diabetes. We have taken a systematic
approach to identifying and validating the most promising therapeutic targets from our past research into the human genome and our efforts are now focused on developing and advancing potential therapeutics through preclinical and clinical
development. As our pipeline has matured over the past few years, we have decreased our early-stage target discovery efforts and focused our resources on the advancement of our oncology therapeutics in the areas of cancer supportive care and the
treatment of cancer. Our 66% majority-owned subsidiary, 454 Life Sciences (454), has commercialized advanced instruments and related technologies for sequencing DNA. 454s current products perform rapid and comprehensive whole
genome sequencing, or the determination of the nucleotide sequence of entire genomes, as well as ultra-deep sequencing, or the accurate detection of mutations in target genes of interest. The 454 Sequencing System comprises
454s Genome Sequencer 20 Instrument (GS20), reagent kits, disposables and a suite of analysis software.

Recent Developments

Preclinical and Clinical Therapeutics

We are currently focusing our resources on the development of our oncology therapeutics in the areas of cancer supportive care and the treatment of cancer. We also maintain a portfolio of proteins, antibodies, small
molecules, and targets in various stages of development in the areas of oncology, inflammatory diseases and diabetes.

Oncology Pipeline



| |  |  | Velafermin is a protein therapeutic that we are investigating for the prevention of oral mucositis (OM), a debilitating side effect experienced by many cancer patients
receiving treatment with chemotherapy, radiotherapy, or a combination thereof. In December 2005, we completed a Phase II clinical trial on velafermin that randomized 212 patients undergoing high-dose chemotherapy, with or without total body
irradiation, prior to autologous bone marrow transplantation, to receive a single administration of either placebo or one of three doses of velafermin for the prevention of OM. Results from this trial were presented in February 2006 at the 2006 Bone
Marrow Transplantation Tandem Meetings. Data presented suggest that a single dose of 30 mcg/kg velafermin administered to patients one day after reinfusion of stem cells may reduce the incidence of severe Grade 3 or 4 OM, however the primary
analysis for a linear dose trend across increasing doses of velafermin did not achieve statistical significance. To confirm the activity of the 30 mcg/kg dose of velafermin, we are conducting a second Phase II trial, which began enrolling patients
in May 2006. This study will evaluate the efficacy of 30 mcg/kg velafermin compared to placebo for the prevention of OM, and also evaluate the activity of a single dose of 10 mcg/kg velafermin or 60 mcg/kg velafermin compared to placebo;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | PXD101 is a small molecule histone deacetylase inhibitor we in-licensed from TopoTarget A/S in June 2004 and it is currently being investigated for the treatment of cancer, both as
a single agent and in combination with other anti-cancer treatments. We are currently studying the activity of PXD101 in five proof-of-concept clinical trials:
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                   |  |       |  |                                                |  |                                 |  |                            
|---------------------------------- |  | ----- |  | ---------------------------------------------- |  | ------------------------------- |  | ---------------------------
|Indication                         |  | Phase |  | Regimen                                        |  | Initiation of PatientEnrollment |  | Anticipated Milestone      
|Multiple myeloma                   |  | II    |  | Monotherapy or incombination withdexamethasone |  | January 2005                    |  | Preliminary resultsQ3 2006 
|                                   |  |       |  |                                               
|Solid tumors and colorectal cancer |  | Ib    |  | Combination with5-fluorouracil                 |  | September 2005                  |  | Preliminary resultsQ4 2006 
|                                   |  |       |  |                                               
|Solid tumors and ovarian cancer    |  | Ib    |  | Combination withpaclitaxel and/orcarboplatin   |  | September 2005                  |  | Preliminary resultsQ4 2006 
|                                   |  |       |  |                                               
|T-cell lymphoma                    |  | II    |  | Monotherapy                                    |  | January 2006                    |  | Preliminary resultsmid 2007
|                                   |  |       |  |                                               
|Multiple myeloma                   |  | Ib    |  | Combination withVelcade®                       |  | March 2006                      |  | Preliminary resultsmid 2007



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##### Table of Contents

| |  | Under the Clinical Trials Agreement we signed with the National Cancer Institute (NCI) in August 2005, the NCI will also initiate additional clinical trials evaluating
PXD101, both alone and in combination, for other cancer indications. There are currently five NCI-sponsored trials that have begun treating patients at sites both in the United States of America and abroad:
| |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                   |  |       |  |                                   |  |                                 
|---------------------------------- |  | ----- |  | --------------------------------- |  | --------------------------------
|Indication                         |  | Phase |  | Regimen                           |  | Initiation of Patient Enrollment
|Advanced solid tumors or lymphomas |  | Ib    |  | Combination with Velcade®         |  | March 2006                      
|                                   |  |       | 
|Acute Myelogenous Leukemia         |  | II    |  | Monotherapy                       |  | June 2006                       
|                                   |  |       | 
|Advanced solid tumors              |  | Ib    |  | Combination withcis-retinoic acid |  | June 2006                       
|                                   |  |       | 
|Mesothelioma                       |  | II    |  | Monotherapy                       |  | June 2006                       
|                                   |  |       | 
|Hepatocellular carcinoma           |  | I/II  |  | Monotherapy                       |  | July 2006                       



| |  |  | CR011 is a fully-human monoclonal antibody resulting from our collaboration with Amgen (formerly Abgenix, Inc.), and utilizes antibody-drug conjugation (ADC) technology
licensed from Seattle Genetics to attach monomethyl auristatin E (MMAE) to yield CR011-vcMMAE. In June 2006, we announced that the investigational new drug application (IND) for CR011-vcMMAE had been cleared by the U.S. Food
and Drug Administration (FDA) and dosing of patients in a Phase I clinical trial had begun. The open-label, multi-center, dose-escalation study will evaluate the safety, tolerability and pharmacokinetics of CR011-vcMMAE for patients with
unresectable Stage III or Stage IV melanoma who have failed no more than one prior line of cytotoxic therapy. The first part of the trial will evaluate cohorts of patients receiving increasing doses of CR011-vcMMAE to determine the maximum tolerated
dose (MTD). After determination of the MTD, up to approximately 30 additional patients will be enrolled and treated at the MTD to further define safety and efficacy in this Phase I trial;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | CR014 is a fully-human monoclonal ADC that targets TIM-1, also known as T-cell Immunoglobulin domain and Mucin domain 1, and is in preclinical studies to evaluate its role in the
treatment of ovarian cancer and renal cell carcinoma. In March 2006, we presented new preclinical data on CR014 at the 97th Annual Meeting of the American Association for Cancer Research (AACR) in Washington, D.C., that demonstrated significant
anti-proliferative activity on antigen positive renal and ovarian carcinoma cell lines both in vitro and in vivo;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | CR012 is a fully-human monoclonal antibody that targets SLPI, also known as secretory leukocyte protease inhibitor, a protein located on the surface of certain cancer cells, and is
in preclinical studies to evaluate its role in the treatment of colorectal and ovarian cancers. In March 2006, we presented new preclinical data on CR012 at the 97th Annual Meeting of the AACR in Washington, D.C. that demonstrated inhibition of
colon carcinoma cell lines growth in vitro and in vivo.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In addition, we have identified several potential proteins,
antibodies, and small molecules that have been or are being prepared to be evaluated for potential therapeutic use in animal studies. We will continue to evaluate strategic opportunities and potential clinical use for these assets through
partnerships, licensing, or the submission of INDs in the future.



15



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##### Table of Contents

454 Life Sciences Corporation

454 was formed in 2000 as our majority-owned subsidiary. 454 has commercialized advanced technologies for whole genome and ultra-deep sequencing. The GS20
sequences more than 20 million bases from over 200,000 independent DNA fragments per five hour run on a single instrument. We believe 454s affordable, high-throughput technology will expand the market for sequencing beyond genome centers,
where the majority of such sequencing is currently performed, to research centers and academic institutions.

In April 2006, 454 and F.
Hoffman-LaRoche Ltd. (Roche), 454s distribution partner, announced enhancements to the GS20 including average single read accuracy of greater than or equal to 99%, two additional PicoTiterPlate gasket formats, new software
algorithms supporting additional applications, and a Laboratory Information Management System enabled mode that allows the system to be embedded into existing lab infrastructures.

In June 2006, in collaboration with scientists at the Dana Farber Cancer Institute and the Broad Institute, 454 reported a new method for the detection
of cancer gene mutations present at extremely low levels. The research was published online (ahead of print) in the journal Nature Medicine in an article entitled, Sensitive mutation detection in heterogeneous cancer specimens by
massively parallel picoliter reactor sequencing, and describes how the 454 sequencing method can identify rare cancer-associated genetic variations at the molecular level, potentially enabling the personalization of targeted therapies.

In July 2006, 454 announced a collaboration with the Max Planck Institute for Evolutionary Anthropology to sequence the Neanderthal
genome. The project is estimated to take two years and the sequencing is being fully funded by a grant from the Max Planck Society.

Strategic Collaborations

Bayer Metabolic Disease Collaboration

We announced in July 2006, that we were informed by Bayer Pharmaceuticals Corporation (Bayer) that Bayer plans to license BAY 76-7171
(formerly CT052). BAY 76-7171 was discovered under our metabolic disorder collaboration with Bayer aimed at identifying and developing potential small molecule therapeutics for the management of diabetes. An IND application for BAY 76-7171 was
cleared by the FDA in November 2005. In December of 2005, we announced we had exercised our right to revert to a tiered royalty structure under which we would receive royalties on any BAY 76-7171 product sales and we would no longer contribute to
the ongoing development costs for BAY 76-7171. We believe that Bayers intentions to license BAY 76-7171 will have no direct impact on our near term value generation or on our cash utilization.

Amgen Freemont, Inc. (formerly Abgenix)

In December 1999, we entered into a strategic alliance with Abgenix to develop and commercialize antibody therapeutics using Abgenix XenoMouse technology. We amended and restructured this alliance in November 2000 and again in
April 2004. The initial phase of the agreement involving the identification of targets and initiation of monoclonal antibody generation was completed in June 2005. We and Abgenix continue to jointly characterize antibody candidates under the
research phase of the alliance, and have, to date, characterized ten antibodies as having commercial product potential. We have elected to further develop nine of these antibodies and Abgenix has elected one. Under the agreement, antibodies
resulting from the strategic alliance are available for characterization and allocation until December 2007.

In April 2006, Amgen Inc.
(Amgen) acquired Abgenix and Abgenix now operates as a wholly-owned subsidiary known as Amgen Freemont, Inc. In accordance with the terms of the agreement pertaining to change of control, Amgen automatically assumed all obligations of
the agreement.

Summary

We expect to generate value for our shareholders by developing novel therapeutics and advanced technologies for the sequencing of DNA. We expect to become profitable by commercializing a subset of therapeutics stemming from our development
pipeline, and establishing partnerships with pharmaceutical and biotechnology companies for the development and commercialization of other therapeutics from our development pipeline. Our failure to successfully develop pharmaceutical products that
we can commercialize would materially adversely affect our business, financial



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##### Table of Contents

condition and results of operations. Royalties or other revenue generated from commercial sales of products developed through the application of our
technologies and expertise are not expected for several years, if at all. We expect that our revenue or income sources for at least the next several years may be limited to: 454 product, service, grant, and milestone revenue; and interest income.

We expect to continue incurring substantial research and development expenses relating to: preclinical studies and clinical trials
required for the development of therapeutic protein, antibody and small molecule product candidates; external programs that we identify as being promising and synergistic with our products and expertise; and 454, as it continues to work on the
development and commercialization of its technology for whole genome analysis and other sequencing applications. Conducting clinical trials is a lengthy, time-consuming and expensive process. As a result, we expect to incur continued losses over the
next several years, unless we are able to realize significant revenues through 454s sales of DNA sequencing services and the GS20 and related reagents and disposables. The timing and amounts of such revenues cannot be predicted with certainty
and may fluctuate. Results of operations for any period may be unrelated to the results of operations for any other period. In addition, historical results should not be viewed as indicative of future operating results.

Critical Accounting Policies and Use of Estimates

The discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the
United States of America. The preparation of these condensed consolidated financial statements requires us to make estimates and judgments that affect the reported amount of assets and liabilities, revenues and expenses and as such, actual results
may differ from our estimates under different assumptions or conditions. Our significant accounting policies are fully described in Note 1 to our consolidated financial statements included in our Annual Report on Form 10-K for the year ended
December 31, 2005.

Stock-Based Compensation

We utilized the modified prospective transition method to adopt SFAS 123R on January 1, 2006. Under this method, the provisions of SFAS 123R apply to
all awards granted or modified after the date of adoption. In addition, the unrecognized expense of awards not yet vested at the date of adoption, determined under the original provisions of SFAS 123, shall be recorded in net income in the periods
after the date of adoption. Prior to January 1, 2006, we accounted for stock options under the intrinsic value method described in APB 25, and related Interpretations as permitted by SFAS 123. When applying the intrinsic value method to stock
options, we did not record stock-based compensation cost in net loss because the exercise price of our stock options equaled the market price of the underlying stock on the date of grant. For additional information on stock-based compensation,
please see Note 3 to our condensed consolidated financial statements included in this Form 10-Q.



17



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##### Table of Contents

Results of Operations

The following table sets forth a comparison of the components of our net loss for the three month periods ended June 30, 2006 and 2005 (in millions):



|                                     |  |                             |      |      |   |          |  |   |          |   |  |      |   
|------------------------------------ |  | --------------------------- | ---- | ---- | - | -------- |  | - | -------- | - |  | ---- | --
|                                     |  | Three months ended June 30, |     
|                                     |  | 2006                        |      | 2005 |   | $ Change |  |   | % Change |  
|Product revenue                      |  | $                           | 5.4  |      | $ | 2.1      |  | $ | 3.3      |   |  | 157  | % 
|Sequencing service revenue           |  |                             | 2.3  |      |   | 0.5      |  |   | 1.8      |   |  | 360  | % 
|Collaboration revenue                |  |                             | 1.2  |      |   | 1.0      |  |   | 0.2      |   |  | 20   | % 
|Grant revenue                        |  |                             | 0.8  |      |   | 0.7      |  |   | 0.1      |   |  | 14   | % 
|Milestone revenue                    |  |                             | 1.0  |      |   |         |  |   | 1.0      |   |  | 100  | % 
|Cost of product revenue              |  |                             | 3.4  |      |   | 0.5      |  |   | 2.9      |   |  | 580  | % 
|Cost of sequencing service revenue   |  |                             | 1.0  |      |   | 0.2      |  |   | 0.8      |   |  | 400  | % 
|Grant research expenses              |  |                             | 0.8  |      |   | 0.5      |  |   | 0.3      |   |  | 60   | % 
|Research and development expenses    |  |                             | 14.8 |      |   | 15.3     |  |   | (0.5     | ) |  | (3   | )%
|General and administrative expenses  |  |                             | 4.9  |      |   | 4.6      |  |   | 0.3      |   |  | 7    | % 
|Interest income                      |  |                             | 1.9  |      |   | 2.2      |  |   | (0.3     | ) |  | (14  | )%
|Interest expense                     |  |                             | 2.3  |      |   | 3.2      |  |   | (0.9     | ) |  | (28  | )%
|Gain on extinguishment of debt       |  |                             |     |      |   | 1.4      |  |   | (1.4     | ) |  | (100 | )%
|Income tax benefit                   |  |                             | 0.1  |      |   | 0.1      |  |   |         |   |  |     |   
|Minority interest in subsidiary loss |  |                             | 0.2  |      |   | 0.6      |  |   | (0.4     | ) |  | (67  | )%
|                                     |  |                             |      |      |   |          |  |   |          |   |  |      |   
|Net loss                             |  | $                           | 14.3 |      | $ | 15.7     |  |   |          |   |  |      |   
|                                     |  |                             |      |      |   |          |  |   |          |   |  |      |   

The following table sets forth a comparison of the components of our net loss for the six month
periods ended June 30, 2006 and 2005 (in millions):



|                                     |  |                           |      |      |   |          |  |   |          |   |  |      |   
|------------------------------------ |  | ------------------------- | ---- | ---- | - | -------- |  | - | -------- | - |  | ---- | --
|                                     |  | Six months ended June 30, |     
|                                     |  | 2006                      |      | 2005 |   | $ Change |  |   | % Change |  
|Product revenue                      |  | $                         | 9.9  |      | $ | 3.2      |  | $ | 6.7      |   |  | 209  | % 
|Sequencing service revenue           |  |                           | 4.7  |      |   | 0.7      |  |   | 4.0      |   |  | 571  | % 
|Collaboration revenue                |  |                           | 3.0  |      |   | 2.4      |  |   | 0.6      |   |  | 25   | % 
|Grant revenue                        |  |                           | 1.3  |      |   | 1.4      |  |   | (0.1     | ) |  | (7   | )%
|Milestone revenue                    |  |                           | 1.9  |      |   |         |  |   | 1.9      |   |  | 100  | % 
|Cost of product revenue              |  |                           | 6.0  |      |   | 0.7      |  |   | 5.3      |   |  | 757  | % 
|Cost of sequencing service revenue   |  |                           | 2.0  |      |   | 0.3      |  |   | 1.7      |   |  | 567  | % 
|Grant research expenses              |  |                           | 1.2  |      |   | 0.9      |  |   | 0.3      |   |  | 34   | % 
|Research and development expenses    |  |                           | 29.2 |      |   | 32.7     |  |   | (3.5     | ) |  | (11  | )%
|General and administrative expenses  |  |                           | 10.3 |      |   | 8.9      |  |   | 1.4      |   |  | 16   | % 
|Interest income                      |  |                           | 3.9  |      |   | 4.3      |  |   | (0.4     | ) |  | (9   | )%
|Interest expense                     |  |                           | 4.6  |      |   | 6.6      |  |   | (2.0     | ) |  | (30  | )%
|Gain on extinguishment of debt       |  |                           |     |      |   | 1.4      |  |   | (1.4     | ) |  | (100 | )%
|Income tax benefit                   |  |                           | 0.1  |      |   | 0.1      |  |   |         |   |  |     |   
|Minority interest in subsidiary loss |  |                           | 0.3  |      |   | 1.5      |  |   | (1.2     | ) |  | (80  | )%
|                                     |  |                           |      |      |   |          |  |   |          |   |  |      |   
|Net loss                             |  | $                         | 28.2 |      | $ | 35.1     |  |   |          |   |  |      |   
|                                     |  |                           |      |      |   |          |  |   |          |   |  |      |   

The following table sets forth a comparison of revenue by segment, for the three month periods
ended June 30, 2006 and 2005 (in millions):



|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|--------------------------- |  | --------------------------- | --- | ---- | - | -------- |  | - | -------- | - |  | --- | --
|                            |  | Three months ended June 30, |    
|                            |  | 2006                        |     | 2005 |   | $ Change |  |   | % Change |  
|Product revenue:            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                           | 5.4 |      | $ | 2.1      |  | $ | 3.3      |   |  | 157 | % 
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|Sequencing service revenue: |  |                             |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                           | 2.3 |      | $ | 0.5      |  | $ | 1.8      |   |  | 360 | % 
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|Collaboration revenue:      |  |                             |     |      |   |          |  |   |          |   |  |     |   
|CuraGen                     |  | $                           | 0.9 |      | $ | 1.0      |  | $ | (0.1     | ) |  | (10 | )%
|454                         |  |                             | 0.3 |      |   |         |  |   | 0.3      |   |  | 100 | % 
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|Total                       |  | $                           | 1.2 |      | $ | 1.0      |  |   |          |   |  |     |   
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|Grant revenue:              |  |                             |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                           | 0.8 |      | $ | 0.7      |  | $ | 0.1      |   |  | 14  | % 
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   
|Milestone revenue:          |  |                             |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                           | 1.0 |      |   |         |  | $ | 1.0      |   |  | 100 | % 
|                            |  |                             |     |      |   |          |  |   |          |   |  |     |   



18



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##### Table of Contents

The following table sets forth a comparison of revenue by segment, for the six month periods ended
June 30, 2006 and 2005 (in millions):



|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|--------------------------- |  | ------------------------- | --- | ---- | - | -------- |  | - | -------- | - |  | --- | --
|                            |  | Six months ended June 30, |    
|                            |  | 2006                      |     | 2005 |   | $ Change |  |   | % Change |  
|Product revenue:            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                         | 9.9 |      | $ | 3.2      |  | $ | 6.7      |   |  | 209 | % 
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|Sequencing service revenue: |  |                           |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                         | 4.7 |      | $ | 0.7      |  | $ | 4.0      |   |  | 571 | % 
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|Collaboration revenue:      |  |                           |     |      |   |          |  |   |          |   |  |     |   
|CuraGen                     |  | $                         | 2.3 |      | $ | 2.4      |  | $ | (0.1     | ) |  | (4  | )%
|454                         |  |                           | 0.7 |      |   |         |  |   | 0.7      |   |  | 100 | % 
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|Total                       |  | $                         | 3.0 |      | $ | 2.4      |  |   |          |   |  |     |   
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|Grant revenue:              |  |                           |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                         | 1.3 |      | $ | 1.4      |  | $ | (0.1     | ) |  | (7  | )%
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   
|Milestone revenue:          |  |                           |     |      |   |          |  |   |          |   |  |     |   
|454                         |  | $                         | 1.9 |      |   |         |  | $ | 1.9      |   |  | 100 | % 
|                            |  |                           |     |      |   |          |  |   |          |   |  |     |   

Product revenue. 454s product revenue for the three and six month periods
ended June 30, 2006 consisted of GS20 instrumentation, reagents kits and disposables sold to 454s distribution partner, Roche as well as royalties from Roche related to Roches product sales. 454 began selling products directly to
end users in the first quarter of 2005 and through Roche in the fourth quarter of 2005. Under 454s agreement with Roche, 454 receives payments at agreed upon transfer pricing for shipments of 454s products to Roche. In addition, 454
receives a royalty from Roche upon its subsequent sale of products to third parties. We recognize royalties on these sales to third parties when they are earned based upon royalty reports received from Roche at the end of each calendar quarter.
Together, the transfer price and royalty received by 454 from Roche represents approximately 50% of the price paid by the third party.

The
increases in product revenue during the three and six months ended June 30, 2006 were primarily due to increases in the number of instruments, reagents and disposables sold, compared to the same periods in 2005, partially offset by pricing due
to the sharing of revenue with 454s distribution partner, Roche. We expect product revenue to be relatively consistent over the remaining six months of 2006 as compared to the first six months of 2006.

Sequencing service revenue.The increases in sequencing service revenue were due to the number of sequencing service contracts completed in
the three and six month periods ended June 30, 2006, as compared to the same periods in 2005. 454 expects sequencing service revenue to remain consistent over the remaining quarters of 2006.

Collaboration revenue. Collaboration revenue for the three and six month periods ended June 30, 2006 remained relatively
constant with the same periods in 2005. CuraGen completed the work under its Pharmacogenomics Agreement with Bayer AG during the second quarter of 2006 and accordingly, we do not expect to recognize additional collaboration revenue during the second
half of 2006.

Under 454s Research and Development agreement with Roche, Roche has an obligation to fund certain research and
development projects, for which funding can be in the form of cash or in-kind contributions. During the three and six month periods ended June 30, 2006, Roche funded $0.4 million and $0.7 million, respectively, of 454s research and
development. We expect similar funding levels in the second half of 2006.

Grant revenue. Grant revenue for the three and six
month periods ended June 30, 2006 remained relatively constant with the same periods in 2005. Grant revenue was related to two grants from the National Human Genome Research Institute, one of the National Institutes of Health (NIH).
454 completed one of the two grants in the second quarter of 2006 and therefore we expect grant revenue to decrease for the second half of 2006 as compared to the first six months of 2006.

Milestone revenue.Under 454s License, Supply and Distribution Agreement with Roche (the Roche License Agreement), 454 is
entitled to receive both up-front milestone payments for specific events, including contract



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negotiation and signing, supplier agreement execution and future product launches, as well as potential future commission/royalty sales-based payments for
significant cumulative sales by Roche. Up-front payments under the Roche License Agreement are deferred and amortized into revenue on a straight-line basis from the later of the date the payment was earned or the effective date of the agreement,
through the end of the agreement term. For the purposes of milestone revenue recognition, the effective date of the agreement was determined by the management of 454 to be October 2005, the date of the commercial launch by Roche of 454s
products. Milestone revenue for the three and six month periods ended June 30, 2006 relates to the amortization associated with $19.0 million of up-front payments from Roche earned during 2005. We expect milestone revenue to increase during the
second half of 2006 due to recognition of revenue on milestones expected to be earned in the second half of 2006.

Cost of product
revenue. The increase in cost of product revenue for the three and six month periods ended June 30, 2006 was a result of increased product sales. Effective February 1, 2005, the date on which we successfully completed the
installation of our first 454 sequencing instrument at a customer site, we began to capitalize, in inventory, the costs of manufacturing instrumentation and reagents for commercial sale. Certain items that were previously capitalized as fixed assets
were transferred into inventory at the net book value on February 1, 2005. In October 2005, 454 began selling instrumentation, reagents and disposables to Roche at an agreed upon transfer price and earning royalties from Roche on Roche sales.
The profit margin 454 earns on 454s products is expected to decrease in 2006 as compared to 2005 due to the non-recurring nature of the items transferred into inventory and, beginning in the fourth quarter of 2005, 454s selling of
instruments and reagents to Roche at agreed upon transfer prices and in exchange for royalties from Roche. The profit margin for the remaining six months of 2006 is expected to be consistent with the profit margin earned in the first six months of
2006.

Cost of sequencing service revenue.The increase in cost of sequencing service revenue was due to the number of
sequencing service contracts performed in the first half of 2006 as compared to the first half of 2005. We expect the cost of sequencing service revenue to remain relatively consistent over the remaining half of 2006.

Grant research expenses.Grant research expenses for the three and six month periods ended June 30, 2006 were slightly higher than
grant research expenses for the same periods in 2005. Grant research expenses were related to two federal grant awards from the NIH, and include personnel costs and lab supplies that are directly related to the research outlined in the grant award.
454 completed one of the two grants in the second quarter of 2006 and therefore we expect grant research expenses to decrease for the second half of 2006 as compared to the first six months of 2006.

Research and development expenses.The following table sets forth a comparison of research and development expenses by segment, for
the three and six month periods ended June 30, 2006 and 2005 (in millions):



|                                   |  |                             |      |      |   |          |  |   |          |   |  |     |   
|---------------------------------- |  | --------------------------- | ---- | ---- | - | -------- |  | - | -------- | - |  | --- | --
|                                   |  | Three months ended June 30, |     
|                                   |  | 2006                        |      | 2005 |   | $ Change |  |   | % Change |  
|Research and development expenses: |  |                             |      |      |   |          |  |   |          |   |  |     |   
|CuraGen                            |  | $                           | 11.3 |      | $ | 12.6     |  | $ | (1.3     | ) |  | (10 | )%
|454                                |  |                             | 3.5  |      |   | 2.7      |  |   | 0.8      |   |  | 30  | % 
|                                   |  |                             |      |      |   |          |  |   |          |   |  |     |   
|Total                              |  | $                           | 14.8 |      | $ | 15.3     |  |   |          |   |  |     |   
|                                   |  |                             |      |      |   |          |  |   |          |   |  |     |   
|                                   | 
|                                   |  | Six months ended June 30,   |     
|                                   |  | 2006                        |      | 2005 |   | $ Change |  |   | % Change |  
|Research and development expenses: |  |                             |      |      |   |          |  |   |          |   |  |     |   
|CuraGen                            |  | $                           | 22.4 |      | $ | 27.4     |  | $ | (5.0     | ) |  | (18 | )%
|454                                |  |                             | 6.8  |      |   | 5.3      |  |   | 1.5      |   |  | 28  | % 
|                                   |  |                             |      |      |   |          |  |   |          |   |  |     |   
|Total                              |  | $                           | 29.2 |      | $ | 32.7     |  |   |          |   |  |     |   
|                                   |  |                             |      |      |   |          |  |   |          |   |  |     |   

Research and development expenses consist primarily of: salary and benefits; supplies and
reagents; contractual and manufacturing costs; perpetual license fees and milestone payments; depreciation and amortization; and allocated facility costs. Our research and development efforts to date have been concentrated on four major project
areas: clinical trials; 454; preclinical drug candidates; and collaborations. With the exception of 454, we budget and monitor our research and development costs by expense category, rather than by project, because these costs often benefit multiple
projects and/or our technology platform.



20



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##### Table of Contents

Below is a summary that reconciles our total research and development expenses, for the three and six
month periods ended June 30, 2006 and 2005 (in millions):



|                                              |  |                             |      |      |   |          |  |   |          |   |  |     |   
|--------------------------------------------- |  | --------------------------- | ---- | ---- | - | -------- |  | - | -------- | - |  | --- | --
|                                              |  | Three months ended June 30, |     
|                                              |  | 2006                        |      | 2005 |   | $ Change |  |   | % Change |  
|Salary and benefits                           |  | $                           | 4.0  |      | $ | 4.1      |  | $ | (0.1     | ) |  | (2  | )%
|Supplies and reagents                         |  |                             | 1.4  |      |   | 2.6      |  |   | (1.2     | ) |  | (46 | )%
|Contractual and manufacturing costs           |  |                             | 4.7  |      |   | 4.4      |  |   | 0.3      |   |  | 7   | % 
|Perpetual license fees and milestone payments |  |                             | 1.3  |      |   | 1.0      |  |   | 0.3      |   |  | 30  | % 
|Depreciation and amortization                 |  |                             | 0.9  |      |   | 1.0      |  |   | (0.1     | ) |  | (10 | )%
|Allocated facility costs                      |  |                             | 2.5  |      |   | 2.2      |  |   | 0.3      |   |  | 14  | % 
|                                              |  |                             |      |      |   |          |  |   |          |   |  |     |   
|Total research and development expenses       |  | $                           | 14.8 |      | $ | 15.3     |  |   |          |   |  |     |   
|                                              |  |                             |      |      |   |          |  |   |          |   |  |     |   
|                                              | 
|                                              |  | Six months ended June 30,   |     
|                                              |  | 2006                        |      | 2005 |   | $ Change |  |   | % Change |  
|Salary and benefits                           |  | $                           | 8.2  |      | $ | 8.2      |  | $ |         |   |  |    |   
|Supplies and reagents                         |  |                             | 3.0  |      |   | 4.0      |  |   | (1.0     | ) |  | (25 | )%
|Contractual and manufacturing costs           |  |                             | 9.6  |      |   | 8.9      |  |   | 0.7      |   |  | 8   | % 
|Perpetual license fees and milestone payments |  |                             | 1.3  |      |   | 5.0      |  |   | (3.7     | ) |  | (74 | )%
|Depreciation and amortization                 |  |                             | 1.9  |      |   | 2.0      |  |   | (0.1     | ) |  | (5  | )%
|Allocated facility costs                      |  |                             | 5.2  |      |   | 4.6      |  |   | 0.6      |   |  | 13  | % 
|                                              |  |                             |      |      |   |          |  |   |          |   |  |     |   
|Total research and development expenses       |  | $                           | 29.2 |      | $ | 32.7     |  |   |          |   |  |     |   
|                                              |  |                             |      |      |   |          |  |   |          |   |  |     |   

The decrease in research and development expenses for CuraGen for the three month period ended
June 30, 2006 as compared to the same period in 2005 was primarily due to a decrease in supplies and reagents, a decrease in salary and benefits caused by a decrease in headcount, offset by increased non-cash expenses related to stock options
and restricted stock recorded under SFAS 123R. The decrease in research and development expenses for CuraGen for the six month period ended June 30, 2006 as compared to the same period in 2005 was primarily due to a decrease in supplies and
reagents, first quarter 2005 perpetual license fee payments of approximately $4.0 million (primarily related to our collaborations with TopoTarget and Seattle Genetics) and a decrease in salary and benefits caused by a decrease in headcount, offset
by increased non-cash expenses related to stock options and restricted stock recorded under SFAS 123R. We anticipate a slight decrease in research and development expenses during 2006 as compared to 2005, primarily in salaries and benefits,
perpetual license fees and supplies and reagents, offset by an increase in contractual costs.

The increases in research and development
expenses for 454 for the three and six month periods ended June 30, 2006 as compared to the same periods in 2005 were primarily due to increased salary and benefits, as a result of an increase in personnel and non-cash expenses for stock
options recorded under SFAS 123R, and increased supply and reagent expenses. We expect 454s research and development expenses to increase slightly in the remaining quarters of 2006 due to the completion of one of 454s two grants, as the
personnel who were supporting this grant will be utilized in other internal research and development projects.

As soon as we
advance a potential clinical candidate into clinical trials, we begin to track the direct research and development expenses associated with that potential clinical candidate. The following tables show the cumulative direct research and development
expenses as of June 30, 2006, as well as the current direct research and development expenses for the three and six month periods ended June 30, 2006 and 2005, which were incurred on or after we started conducting a Phase I clinical trial
for a clinical candidate (in millions)



|                                       |  |                         |  |                                                                |  |                     |  |             
|-------------------------------------- |  | ----------------------- |  | -------------------------------------------------------------- |  | ------------------- |  | ------------
|Therapeutic Area and
ClinicalCandidate |  | Class                   |  | Cumulative as of June 30, 2006 (since commencement of Phase
I) |  | Indication          |  | Trial Status
|Cancer Supportive Care                 |  |                         |  |                                                                |  |                     |  |             
|                                       |  |                         |  |                                                               
|Velafermin                             |  | Protein                 |  | $30.1                                                          |  | Oral Mucositis      |  | Phase II    
|                                       |  |                         |  |                                                               
|Oncology                               |  |                         |  |                                                                |  |                     |  |             
|                                       |  |                         |  |                                                               
|PXD101                                 |  | Small Molecule          |  | $24.0                                                          |  | Various Cancers     |  | Phase II    
|                                       |  |                         |  |                                                               
|CR011-vcMMAE                           |  | Antibody-Drug Conjugate |  | $2.8                                                           |  | Metastatic Melanoma |  | Phase I     
|                                       |  |                         |  |                                                               
|Kidney Inflammation                    |  |                         |  |                                                                |  |                     |  |             
|                                       |  |                         |  |                                                               
|CR002                                  |  | Antibody                |  | $1.6                                                           |  | Kidney Inflammation |  | Phase I     



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##### Table of Contents

|                                       |               |                    |               |                  |               |      |               |     
|-------------------------------------- | ------------- | ------------------ | ------------- | ---------------- | ------------- | ---- | ------------- | ----
|Therapeutic Area and
ClinicalCandidate |               | Three Months Ended |               | Six Months Ended
|                                       | June 30, 2006 |                    | June 30, 2005 |                  | June 30, 2006 |      | June 30, 2005
|Cancer Supportive Care                 |               |                    |               |                  |               |      |               |     
|                                       |               |                    |               |                 
|Velafermin                             |               | $2.2               |               | $1.6             |               | $4.5 |               | $3.3
|                                       |               |                    |               |                 
|Oncology                               |               |                    |               |                  |               |      |               |     
|                                       |               |                    |               |                 
|PXD101                                 |               | $2.7               |               | $1.7             |               | $5.0 |               | $6.6
|                                       |               |                    |               |                 
|CR011-vcMMAE                           |               | $2.8               |               |                 |               | $2.8 |               |    
|                                       |               |                    |               |                 
|Kidney Inflammation                    |               |                    |               |                  |               |      |               |     
|                                       |               |                    |               |                 
|CR002                                  |               | $0.1               |               | $0.5             |               | $0.1 |               | $0.7

Currently, our potential pharmaceutical products require significant research and development
efforts and preclinical testing, and will require extensive evaluation in clinical trials prior to submitting an application to regulatory agencies for their commercial use. Although we are conducting or have conducted human studies with respect to
velafermin, PXD101, CR0011-vcMMAE, and CR002, we may not be successful in developing or commercializing these or other products. Our product candidates are subject to the risks of failure inherent in the development and commercialization of
pharmaceutical products and we cannot currently provide reliable estimates as to when, if ever, our product candidates will generate revenue and cash flows.

Completion of research and development, preclinical testing and clinical trials may take many years. Estimates of completion periods for any of our major research and development projects are highly speculative and
variable, and dependent on the nature of the disease indication, how common the disease is among the general populace, and the results of the research. For example, preclinical testing and clinical trials can often go on for an indeterminate period
of time since the results of tests are continually monitored, with each test considered complete only when sufficient data has been accumulated to assess whether the next phases of clinical trials are warranted or whether the effort
should be abandoned. Typically, Phase I clinical trials are expected to last between 12 and 24 months, Phase II clinical trials are expected to last between 24 and 36 months and Phase III clinical trials are expected to last between 24 and 60
months. The most significant time and costs associated with clinical development are the Phase III trials as they tend to be the longest and most comprehensive studies conducted during the drug development process.

In addition, many factors may delay the commencement and speed of completion of preclinical testing and clinical trials, including, but not limited to,
the number of patients participating in the trial, the duration of patient follow-up required, the number of clinical sites at which the trials are conducted, and the length of time required to locate and enroll suitable patient subjects. The
successful completion of our development programs and the successful development of our product candidates are highly uncertain and are subject to numerous challenges and risks. Therefore, we cannot presently estimate anticipated completion dates
for any of our projects.

Due to the variability in the length of time necessary to develop a product candidate, the uncertainties related
to the cost of projects and the need to obtain governmental approval for commercialization, accurate and meaningful estimates of the ultimate costs to bring our product candidates to market are not available. If our major research and development
projects are delayed, then we can expect to incur additional costs in conducting our preclinical testing and clinical trials, and a longer period of time before we become profitable from our operating activities. Accordingly, the timing of the
potential market approvals for our existing product candidates, velafermin, PXD101, CR0011-vcMMAE, CR002, and future product development candidates, may have a significant impact on our capital requirements.

General and administrative expenses.The following table sets forth a comparison of general and administrative expenses by
segment, for the three and six month periods ended June 30, 2006 and 2005(in millions)



|                                     |  |                             |     |      |   |          |  |   |          |   |  |    |   
|------------------------------------ |  | --------------------------- | --- | ---- | - | -------- |  | - | -------- | - |  | -- | --
|                                     |  | Three months ended June 30, |    
|                                     |  | 2006                        |     | 2005 |   | $ Change |  |   | % Change |  
|General and administrative expenses: |  |                             |     |      |   |          |  |   |          |   |  |    |   
|CuraGen                              |  | $                           | 3.0 |      | $ | 3.2      |  | $ | (0.2     | ) |  | (6 | )%
|454                                  |  |                             | 1.9 |      |   | 1.4      |  |   | 0.5      |   |  | 36 | % 
|                                     |  |                             |     |      |   |          |  |   |          |   |  |    |   
|Total                                |  | $                           | 4.9 |      | $ | 4.6      |  |   |          |   |  |    |   
|                                     |  |                             |     |      |   |          |  |   |          |   |  |    |   



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##### Table of Contents

|                                     |  |                           |      |      |   |          |  |          |     |  |    |  
|------------------------------------ |  | ------------------------- | ---- | ---- | - | -------- |  | -------- | --- |  | -- | -
|                                     |  | Six months ended June 30, |     
|                                     |  | 2006                      |      | 2005 |   | $ Change |  | % Change |    
|General and administrative expenses: |  |                           |      |      |   |          |  |          |     |  |    |  
|CuraGen                              |  | $                         | 6.7  |      | $ | 6.1      |  | $        | 0.6 |  | 10 | %
|454                                  |  |                           | 3.6  |      |   | 2.8      |  |          | 0.8 |  | 29 | %
|                                     |  |                           |      |      |   |          |  |          |     |  |    |  
|Total                                |  | $                         | 10.3 |      | $ | 8.9      |  |          |     |  |    |  
|                                     |  |                           |      |      |   |          |  |          |     |  |    |  

CuraGens general and administrative expenses for the three month period ended June 30,
2006 remained relatively constant as compared to the same period in 2005, resulting from a decrease in overhead expenses offset by increased non-cash expenses related to stock options and restricted stock recorded under SFAS 123R. The increase in
CuraGens general and administrative expenses for the six month period ended June 30, 2006, as compared to the same period in 2005 was primarily a result of executive recruiting costs, consulting and legal fees and non-cash expenses for
stock options and restricted stock recorded under SFAS 123R. Our general and administrative expenses are expected to increase slightly for the full year 2006 as compared to 2005.

The increase in 454s general and administrative expenses for the three and six month periods ended June 30, 2006 was attributable to the
growth in the employee base as a result of the commercialization of 454s GS20 as well as non-cash expenses for stock options recorded under SFAS 123R. We expect 454s general and administrative expenses to continue to increase slightly
during the remaining quarters of 2006.

Interest income. Interest income for the three and six month periods ended
June 30, 2006 decreased slightly as compared to the same period in 2005 primarily due to lower cash and investment balances, offset by higher yields on our investment portfolio. We earned an average yield of 3.9% during the second quarter of
2006 as compared to 2.9% in the second quarter of 2005, and earned an average yield of 3.7% during the first six months of 2006 as compared to 2.7% during the same period in 2005. During 2006, we expect the yields in our investment portfolio to
continue to be slightly higher than 2005. However, due to the utilization of cash and investment balances in the normal course of operations, we anticipate interest income to decrease in 2006 by approximately $1.0 million as compared to 2005. In the
event that during 2006 we use cash to repurchase a portion of our remaining debt due in 2007, our estimate of the size of the anticipated decrease in interest income for 2006 will differ accordingly.

Interest expense. Interest expense for the three and six month periods ended June 30, 2006 decreased compared to the same period in
2005 primarily due to the repurchases by us of $63.8 million of our 6% convertible subordinated debentures due 2007 during the second and third quarters of 2005. We expect interest expense, including interest paid to debt holders as well as
amortization of deferred financing costs, to decrease during 2006 as compared to 2005 due to the repurchases as described above. In the event that during 2006 we use cash to repurchase a portion of our remaining existing debt due in 2007, our
estimate of 2006 interest expense will differ accordingly.

Income tax benefit. CuraGen recorded an income tax benefit during
the three and six month periods ended June 30, 2006 as a result of Connecticut legislation, which allows companies to obtain cash refunds from the State of Connecticut at a rate of 65% of their annual research and development expense credit, in
exchange for forgoing carryforward of the research and development credit. We expect our 2006 income tax benefit for CuraGen to be consistent with 2005 (before adjustments to reflect statute expirations), as 2006 qualified expenses are expected to
remain relatively constant as compared to 2005.

Minority interest in subsidiary loss. Minority interest in subsidiary
loss for the three and six month periods ended June 30, 2006 (which is the portion of 454s loss attributable to shareholders of 454 other than us) decreased as compared to the same periods in 2005, due to an increase in 454 revenue
recognized during these periods from the sales of instruments and reagents, as well as sales of sequencing services. During 2006, absent additional 454 financing, losses attributed to the minority ownership in 454 are expected to decrease
significantly as compared to 2005, as the cumulative losses applicable to the minority interest in subsidiary will exceed the minority interest in the equity capital of 454, and all future losses applicable to the minority interest will be charged
to us.

Liquidity and Capital Resources

Since our inception, we have financed our operations and met our capital expenditure requirements primarily through: private placements of equity securities; convertible subordinated debt offerings; public equity offerings; revenues
received under our collaborative research agreements; sales and royalties from sales of instruments and reagents; and receipt of milestone payments and government grants. Since inception, we have not had any off-balance sheet arrangements. To date,
inflation has not had a material effect on our business.



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454 received two federal grants during 2004 for specific purposes that are subject to review and audit by
the grantor agencies. Such audits could lead to requests for reimbursement by the grantor agency for any expenditures disallowed under the terms of the grant. Additionally, any noncompliance with the terms of the grant could lead to loss of current
or future awards.

Cash and investments.The following table depicts the components of our operating, investing and financing
activities for the six month periods ended June 30, 2006 and 2005, using the direct cash flow method (in millions):



|                                                                    |  |                          |       |   |      |   |       |  
|------------------------------------------------------------------- |  | ------------------------ | ----- | - | ---- | - | ----- | -
|                                                                    |  | Six months endedJune 30, |      
|                                                                    |  | 2006                     |       |   | 2005 |  
|Cash received from collaborators, customers and grantors            |  | $                        | 13.9  |   |      | $ | 6.8   |  
|Cash paid to suppliers and employees                                |  |                          | (45.9 | ) |      |   | (36.2 | )
|Restructuring and related charges paid                              |  |                          | (1.1  | ) |      |   | (0.5  | )
|Interest income received                                            |  |                          | 3.9   |   |      |   | 4.2   |  
|Interest expense paid                                               |  |                          | (4.2  | ) |      |   | (6.4  | )
|Income tax benefit received                                         |  |                          | 0.9   |   |      |   | 0.5   |  
|                                                                    |  |                          |       |   |      |   |       |  
|Net cash and investments used in operating activities               |  |                          | (32.5 | ) |      |   | (31.6 | )
|                                                                    |  |                          |       |   |      |   |       |  
|Cash paid to acquire property and equipment                         |  |                          | (0.7  | ) |      |   | (7.1  | )
|Proceeds from sale of fixed assets                                  |  |                          | 0.1   |   |      |   | 0.1   |  
|                                                                    |  |                          |       |   |      |   |       |  
|Net cash and investments used in investing activities               |  |                          | (0.6  | ) |      |   | (7.0  | )
|                                                                    |  |                          |       |   |      |   |       |  
|Cash received from employee stock option exercises                  |  |                          | 0.7   |   |      |   | 0.2   |  
|Cash paid for extinguishment of debt                                |  |                          |      |   |      |   | (12.4 | )
|                                                                    |  |                          |       |   |      |   |       |  
|Net cash and investments provided by (used in) financing activities |  |                          | 0.7   |   |      |   | (12.2 | )
|                                                                    |  |                          |       |   |      |   |       |  
|Unrealized loss on short-term investments and marketable securities |  |                          | (0.5  | ) |      |   | (0.5  | )
|                                                                    |  |                          |       |   |      |   |       |  
|Net decrease in cash and investments                                |  |                          | (32.9 | ) |      |   | (51.3 | )
|Cash and investments, beginning of period                           |  |                          | 226.5 |   |      |   | 328.1 |  
|                                                                    |  |                          |       |   |      |   |       |  
|Cash and investments, end of period                                 |  | $                        | 193.6 |   |      | $ | 276.8 |  
|                                                                    |  |                          |       |   |      |   |       |  

In accordance with our investment policy, we are utilizing the following investment objectives for
cash and investments: (1) investment decisions are made with the expectation of minimum risk of principal loss, even with a modest penalty in yield; (2) appropriate cash balances and related short-term funds are maintained for immediate
liquidity needs, and appropriate liquidity is available for medium-term cash needs; and (3) maximum yield is achieved.

Future
Liquidity. During the next eighteen months, we expect to continue to fund our operations through a combination of the following sources: cash and investment balances; product revenue; sequencing service revenue; receipt of milestone
payments; grant revenue; interest income; potential public securities offerings; and/or private strategic-driven common stock offerings. We plan to continue making substantial investments to advance our preclinical and clinical drug pipeline, as
well as to advance 454s next-generation sequencing technologies. Accordingly, over the next eighteen months, we foresee the following as significant uses of liquidity: contractual services related to clinical trials and manufacturing; salary
and benefits; perpetual license fees; supplies and reagents; potential milestone payments; and costs related to 454. In addition, we expect the payments of interest to the holders of our 2007 and 2011 convertible subordinated debt to be a continued
significant use of liquidity, as well as the repayment of $66.2 million of the existing 6% convertible subordinated debentures due upon maturity in February 2007.

Depending on market and other conditions, we may continue to repurchase or refinance portions of the existing 6% convertible subordinated debentures due 2007 in open market purchases, in privately negotiated
transactions, or otherwise. Such repurchases may be material and may affect interest income and interest expense, as well as gains or losses on extinguishment of debt. In addition, we also may use sources of liquidity for working capital, for
general corporate purposes, and potentially for future acquisitions of complementary businesses or technologies. The amounts and timing of our actual expenditures will depend upon numerous factors, including the amount and extent of our
acquisitions, our product development activities, and our investments in technology and the amount of cash generated by our operations. Actual expenditures may vary substantially from our estimates. Our failure to use sources of liquidity
effectively could have a material adverse effect on our business, results of operations and financial condition.

We believe that our
existing cash and investment balances and other sources of liquidity will be sufficient to meet our requirements for the next eighteen months. We consider our operating and capital expenditures to be crucial to our future success, and by continuing
to make strategic investments in our preclinical and clinical drug pipeline, as well as



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454, we believe that we are building substantial value for our shareholders. The adequacy of available funds to meet our future operating and capital
requirements, including the repayment of the remaining balance of our $66.2 million of 6% convertible subordinated debentures due February 2, 2007, and our $110.0 million of 4% convertible subordinated notes due February 15, 2011, will
depend on many factors. These factors include: the number, breadth and progress of our research, product development and clinical programs; the amounts and timing of sales of 454s products and services; the costs and timing of obtaining
regulatory approvals for any of our products; examination of strategic options to leverage our investment in 454; potential future acquisitions of complementary businesses or technologies; in-licensing of pharmaceutical products; and costs incurred
in enforcing and defending our patent claims and other intellectual property rights.

While we will continue to explore alternative sources
for financing our business activities, including the possibility of public securities offerings and/or private strategic-driven common stock offerings, we cannot be certain that in the future these sources of liquidity will be available when needed
or that our actual cash requirements will not be greater than anticipated. In appropriate strategic situations, we may seek financial assistance from other sources, including, the sale of certain assets, contributions by others to joint ventures,
other collaborative or licensing arrangements for the development and testing of products under development, and strategic options to leverage our investment in 454. However, should we be unable to obtain future financing either through the methods
described above or through other means, we may be unable to meet the critical objective of our long-term business plan, which is to successfully develop and market pharmaceutical products, and may be unable to continue operations. This result could
cause our shareholders to lose all or a substantial portion of their investment.

Recently Enacted Pronouncements

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 is a revision of FASB Statement of Financial Accounting Standards No. 123, Accounting for Stock-Based Compensation (SFAS 123) and which supersedes
Accounting Principles Board Opinion No. 25 Accounting for Stock Issued to Employees. SFAS 123, as originally issued, is effective until the provisions of SFAS 123R are fully adopted. In addition, in March 2005, the FASB issued Staff
Accounting Bulletin No. 107 which provided guidance regarding the interaction between SFAS 123R and certain SEC rules and regulations and provided additional guidance regarding the valuation of share-based payment arrangements for public
companies. SFAS 123R is effective for public entities that do not file as a small business issuer, as of the beginning of the first annual reporting period that begins after June 15, 2005, and therefore, we adopted SFAS 123R on January 1,
2006. Effective with the adoption of SFAS 123R the proforma disclosures previously permitted under SFAS 123 will no longer be an alternative to financial statement recognition. SFAS 123R establishes standards for the accounting for transactions in
which an entity exchanges its equity instruments for goods or services. It also addresses transactions in which an entity incurs liabilities in exchange for goods or services that are based on the fair value of the entitys equity instruments
or that may be settled by the issuance of those equity instruments. Under SFAS 123R, we must determine the appropriate fair value model to be used for valuing share-based payments, the attribution method for compensation cost and the transition
method to be used at date of adoption. For public companies the available transition methods include modified prospective and retroactive adoption options. See Note 3 to our condensed consolidated financial statements for further details of the
adoption of SFAS 123R.

In July 2006, the FASB issued FASB Interpretation No. 48, Accounting for Uncertainty in Income
Taxes (FIN No. 48). FIN No. 48 clarifies the accounting for uncertainty in income taxes recognized in an enterprises financial statements in accordance with FASB Statement No. 109. Accounting for Income
Taxes. This interpretation prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. It also provides guidance on
derecognition, classification, interest and penalties, accounting for taxes in interim periods and disclosure requirements. We are currently evaluating the impact this interpretation will have on our financial statements. For our Company, this
interpretation will be effective beginning January 1, 2007.



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Certain Factors That May Affect Results of Operations

The SEC encourages companies to disclose forward-looking information so that investors can better understand a companys future prospects and make
informed investment decisions. This Quarterly Report on Form 10-Q contains such forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical
facts are forward-looking statements for purposes of these provisions, including any projections of earnings, revenues or other financial items, any statement of the plans and objectives of management for future operations, any
statements concerning proposed new products or licensing or collaborative arrangements, any statements regarding future economic conditions or performance, and any statement of assumptions underlying any of the foregoing. It is our intent that such
statements be protected by the safe harbor created thereby. Forward-looking statements are subject to certain risks and uncertainties. Examples of such statements include, but are not limited to, estimate, project,
plan, intend, expect, believe, anticipate, should, may, will, and similar expressions. Forward-looking statements may include statements about our:



| |  |  | anticipated progress of clinical development programs;
| | - |  | ------------------------------------------------------



| |  |  | anticipated progress in technology development and commercialization strategy;
| | - |  | ------------------------------------------------------------------------------



| |  |  | results and projected timetables of our clinical trials;
| | - |  | --------------------------------------------------------



| |  |  | potential future licensing fees, milestone payments, grants and royalty payments;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | ability to market, commercialize and achieve market acceptance for our product candidates or products that we develop;
| | - |  | ----------------------------------------------------------------------------------------------------------------------



| |  |  | ability to expand our relevant market;
| | - |  | --------------------------------------



| |  |  | expected future financial results, including estimated revenues, cost of product revenue, cost of sequencing service revenue, operating expenses, interest income, interest expense,
income tax benefit and minority interest in subsidiary loss;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | estimates regarding the future sufficiency of our cash resources;
| | - |  | -----------------------------------------------------------------



| |  |  | expectation that we may repurchase or refinance additional portions of the existing 6% convertible subordinated debentures due 2007; and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------



| |  |  | plans to continue to explore alternative sources for financing our business activities.
| | - |  | ---------------------------------------------------------------------------------------

These forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from those suggested by the forward-looking statements. Such statements are based on
managements current expectations and are subject to a number of risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. We caution investors that there can be no
assurance that actual results or business conditions will not differ materially from those projected or suggested in such forward looking statements as a result of various factors, including, but not limited to, the following: the risk that any one
or more of our drug development programs will not proceed as planned for technical, scientific or commercial reasons or due to patient enrollment issues or based on new information from nonclinical or clinical studies or from other sources; the
success of competing products and technologies; our stage of development as a biopharmaceutical company; government regulation and healthcare reform; technological uncertainty and product development risks; product liability exposure; uncertainty of
additional funding; our history of incurring losses and the uncertainty of achieving profitability; reliance on research collaborations and strategic alliances; competition; patent infringement claims against our products, processes and
technologies; our ability to protect our patents and proprietary rights; and, uncertainties relating to commercialization rights. Please refer to our Annual Report on Form 10-K for the year ended December 31, 2005 and Item 1A of this
report for a description of these risks. We disclaim any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, unless required by law.



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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Our outstanding current liabilities as
of June 30, 2006 included $66.2 million of our 6% convertible subordinated notes due February 2, 2007. Our outstanding long-term liabilities as of June 30, 2006 included $110.0 million of our 4% convertible subordinated notes due
February 15, 2011, a long-term liability of $0.5 million for the remaining future minimum payments under a license agreement (see Note 15 to our consolidated financial statements included in our Annual Report on Form 10-K for the year ended
December 31, 2005) and the long-term portion of 454s deferred revenue in the amount of $12.4 million. As the debentures and notes bear interest at a fixed rate, our results of operations would not be affected by interest rate changes. As
of June 30, 2006, the market value of our $66.2 million 6% convertible subordinated debentures due 2007, based on quoted market prices, was $66.0 million, and the market value of our $110.0 million 4% convertible subordinated notes due 2011,
based on quoted market prices, was $82.0 million. Although future borrowings may bear interest at a floating rate, and our result of operations would therefore be affected by interest rate changes, at this point we do not anticipate any significant
future borrowings at floating interest rates, and therefore do not believe that a change of 100 basis points in interest rates would have a material effect on our financial condition.

There have been no other significant changes in our market risk compared to the disclosures in Item 7a of our Annual Report on Form 10-K for the
year ended December 31, 2005.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures

As required by Rule 13a -15 under the Securities Exchange Act, our management, under the supervision and with the participation of our Chief Executive
Officer (CEO) and Chief Financial Officer (CFO), performed an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this report. Based upon that evaluation, these
officers have concluded that, as of June 30, 2006, our disclosure controls and procedures were adequate and effective and designed to provide reasonable assurance that the information required to be disclosed is recorded, processed, summarized
and reported within the time periods specified in SEC rules and forms.

(b) Changes in Internal Controls

There have been no changes in our internal controls over financial reporting, identified in connection with the above-mentioned evaluation of such
internal controls that occurred during our last fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.



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Part II - Other Information

Item 1A. Risk Factors

Item 1A, Risk Factors, of our Form 10-K for the year ended
December 31, 2005 includes a detailed discussion of our risk factors. The information presented below updates, and should be read in conjunction with, the risk factors and information disclosed in our Form 10-K.

454s Sequencing System and reagent kits have been offered commercially for only a short period of time and its technology platform is based on new and
relatively unproven technologies and methods. Our future success depends on market acceptance of our current products and our continued research, development and commercialization efforts relating to the future versions of our sequencing systems.

We began marketing, selling and distributing our 454 Sequencing System in 2005 as the GS20 and, as of December 31, 2005, had
placed twenty systems. The future versions of our sequencing systems are either in development or the early stages of commercialization. Compared to well-known technologies, our DNA sequencing system has not yet been widely adopted or accepted.
Accordingly, to be successful, our current and future sequencing systems, and the technologies underlying those products, must be accepted by our target markets. This market acceptance and the success of our products will depend on numerous factors,
including:



| |  |  | the ability to use our products for large-scale applications of DNA sequencing in a cost effective and dependable manner;
| | - |  | -------------------------------------------------------------------------------------------------------------------------



| |  |  | whether customers adopt our DNA sequencing systems, as opposed to the products and technologies offered by our competitors;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | the willingness and ability of more researchers to invest in DNA sequencing technology than have already done so to date;
| | - |  | -------------------------------------------------------------------------------------------------------------------------



| |  |  | the willingness and ability of customers to adopt new technologies requiring additional capital investment; and
| | - |  | ---------------------------------------------------------------------------------------------------------------



| |  |  | our ability to manufacture, market, sell and distribute our DNA sequencing systems and reagent kits on a competitive cost basis.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------

If a third party successfully asserts that 454 has infringed its patents, our business could be adversely affected.

We are aware of certain issued patents that are held by Illumina, Inc. (Illumina) and which may be construed by Illumina to apply to an aspect
of 454s sequencing technology that involves the use of DNA-capture beads with 454s PicoTiter plates. We believe that 454 does not infringe any valid claim, either literally or under the doctrine of equivalents, and that, furthermore,
certain claims of these patents should be held invalid if asserted against 454s activities. Nevertheless, intellectual property litigation is expensive and time-consuming, with many risks and uncertainties, and there can be no assurance that
454 will prevail in any specific action.

454 will continue to sell its products and we believe that alternative configurations of
454s products are available. We expect that any such reconfiguration would take a number of months to implement and we cannot assure you that any such reconfiguration would be technologically feasible or would meet current customer
requirements.

If 454 were unsuccessful in any action in which these patents were asserted and/or in reconfiguring its products in a timely
way, it might have to curtail the manufacture and sale of its products, which could adversely affect our business.



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Item 4. Submission of Matters to a Vote of Security Holders

We held our annual meeting of shareholders on
May 3, 2006, and the following matter was voted on at that meeting:

The election of Frank M. Armstrong, M.D. and Vincent T. DeVita,
Jr., M.D. as Class II Directors, to serve for a three-year term of office or until their respective successors have been elected. The following chart shows the number of votes cast for or withheld:



|                             |  |            |  |         
|---------------------------- |  | ---------- |  | --------
|DIRECTOR                     |  | FOR        |  | WITHHELD
|Frank M. Armstrong, M.D.     |  | 48,100,833 |  | 383,550 
|Vincent T. DeVita, Jr., M.D. |  | 48,099,938 |  | 384,445 

Our current Directors are Frank M. Armstrong, M.D., Michael J. Astrue, Vincent T. DeVita, Jr.,
M.D., David R. Ebsworth, Ph.D., John H. Forsgren, Robert E. Patricelli, Jonathan M. Rothberg, Ph.D., and Patrick J. Zenner.



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##### Table of Contents

Item 6. Exhibits



|               |  |                                                                                                                                                               
|-------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit 3.1    |  | Amended and Restated Certificate of Incorporation of 454 Life Sciences Corporation dated May 22, 2006.                                                        
|               | 
|+Exhibit 10.1  |  | Amendment, dated May 30, 2006, to Metabolic Disorder Collaboration Agreement, dated January 12, 2001, by and between Bayer Corporation and the Registrant.    
|               | 
|~~Exhibit 10.2 |  | 454 Life Sciences Corporation 2006 Equity Incentive Plan (Filed as Exhibit 99.1).                                                                             
|               | 
|~~Exhibit 10.3 |  | 454 Life Sciences Corporation Form of Nonstatutory Stock Option Agreement (Filed as Exhibit 99.2).                                                            
|               | 
|~~Exhibit 10.4 |  | 454 Life Sciences Corporation Form of Incentive Stock Option Agreement (Filed as Exhibit 99.3).                                                               
|               | 
|Exhibit 10.5   |  | Form of Non-Qualified Stock Option Agreement (Standard) of the Registrant.                                                                                    
|               | 
|Exhibit 10.6   |  | Form of Non-Qualified Stock Option Agreement (Director & Officer) of the Registrant.                                                                          
|               | 
|Exhibit 31.1   |  | Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                           
|               | 
|Exhibit 31.2   |  | Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                           
|               | 
|Exhibit 32.1   |  | Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code).

---

|+ | Portions of this Exhibit were omitted and have been filed separately with the Secretary of the Commission pursuant to the registrants application requesting confidential
treatment under Rule 24b-2 of the Exchange Act.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|~~ | Incorporated by reference to the applicable exhibit filed with the registrants Current Report on Form 8-K filed May 24, 2006 for the event dated May 22, 2006.
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

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.



|                      |  |                     |  |                                                                                                                               
|--------------------- |  | ------------------- |  | ------------------------------------------------------------------------------------------------------------------------------
|Dated: August 9, 2006 |  | CuraGen Corporation
|                      |  |                    
|                      |  | By:                 |  | /s/ Frank M. Armstrong, M.D.                                                                                                  
|                      |  |                     |  | Frank M. Armstrong, M.D.                                                                                                      
|                      |  |                     |  | Chief Executive Officer and President                                                                                         
|                      |  |                     |  | (principal executive officer of the registrant)                                                                               
|                      |  |                    
|                      |  | By:                 |  | /s/ David M. Wurzer                                                                                                           
|                      |  |                     |  | David M. Wurzer                                                                                                               
|                      |  |                     |  | Executive Vice-President, Chief Financial Officer and Treasurer (principal financial and accounting officer of the registrant)



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CURAGEN CORPORATION

EXHIBIT INDEX



|               |  |                                                                                                                                                               
|-------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------
|No.            |  |                                                                                                                                                               
|Exhibit 3.1    |  | Amended and Restated Certificate of Incorporation of 454 Life Sciences Corporation dated May 22, 2006.                                                        
|               | 
|+Exhibit 10.1  |  | Amendment, dated May 30, 2006, to Metabolic Disorder Collaboration Agreement, dated January 12, 2001, by and between Bayer Corporation and the Registrant.    
|               | 
|~~Exhibit 10.2 |  | 454 Life Sciences Corporation 2006 Equity Incentive Plan (Filed as Exhibit 99.1).                                                                             
|               | 
|~~Exhibit 10.3 |  | 454 Life Sciences Corporation Form of Nonstatutory Stock Option Agreement (Filed as Exhibit 99.2).                                                            
|               | 
|~~Exhibit 10.4 |  | 454 Life Sciences Corporation Form of Incentive Stock Option Agreement (Filed as Exhibit 99.3).                                                               
|               | 
|Exhibit 10.5   |  | Form of Non-Qualified Stock Option Agreement (Standard) of the Registrant.                                                                                    
|               | 
|Exhibit 10.6   |  | Form of Non-Qualified Stock Option Agreement (Director & Officer) of the Registrant.                                                                          
|               | 
|Exhibit 31.1   |  | Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                           
|               | 
|Exhibit 31.2   |  | Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                           
|               | 
|Exhibit 32.1   |  | Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code).

---

|+ | Portions of this Exhibit were omitted and have been filed separately with the Secretary of the Commission pursuant to the registrants application requesting confidential
treatment under Rule 24b-2 of the Exchange Act.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|~~ | Incorporated by reference to the applicable exhibit filed with the registrants Current Report on Form 8-K filed May 24, 2006 for the event dated May 22, 2006.
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



32