Exhibit 4.5 NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. THIS SECURITY AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES. COMMON STOCK PURCHASE WARRANT To Purchase 167,776 Shares of Common Stock of PURE Bioscience THIS COMMON STOCK PURCHASE WARRANT CERTIFIES that, for value received, Taglich Brothers, Inc. (the "Holder"), is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after October 19, 2007 (the "Initial Exercise Date"), and on or prior to the close of business on October 19, 2012 (the "Termination Date"), but not thereafter, to subscribe for and purchase from PURE Bioscience, a corporation incorporated in the State of California (the "Company"), up to 167,776 shares (the "Warrant Shares") of Common Stock of the Company (the "Common Stock"). The initial purchase price of one share of Common Stock under this Warrant shall be $8.60 (the "Initial Exercise Price"), subject to adjustment herein. The Initial Exercise Price and the number of Warrant Shares for which the Warrant is exercisable shall be subject to adjustment as provided herein. Capitalized terms used and not otherwise defined herein shall have the meanings set forth in that certain Unit Purchase Agreement, dated October 19, 2007, between the Company and the purchasers signatory thereto (as amended or supplemented from time to time, the "Purchase Agreement"). 1. Title to Warrant. Prior to the Termination Date and subject to compliance with applicable laws and Section 7 of this Warrant, this Warrant and all rights hereunder are transferable, in whole or in part, at the office or agency of the Company by the Holder in person or by duly authorized attorney, upon surrender of this Warrant together with the Assignment Form annexed hereto properly endorsed. The transferee shall sign an investment letter in form and substance reasonably satisfactory to the Company. 2. Authorization of Shares. The Company covenants that all Warrant Shares which may be issued upon the exercise of the purchase rights represented by this Warrant will, upon exercise of the purchase rights represented by this Warrant, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens and charges in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue). 3. Exercise of Warrant. (a) Except as provided in Section 4 of this Warrant, exercise of the purchase rights represented by this Warrant, in whole or in part, may be made at any time or times on or after the Initial Exercise Date and on or before the Termination Date by the surrender of this Warrant and the Notice of Exercise Form annexed hereto duly executed, at the office of the Company (or such other office or agency of the Company as it may designate by notice in writing to the registered Holder at the address of such Holder appearing on the books of the Company) and upon payment of the Exercise Price (as defined below) for the number of Warrant Shares with respect to which this Warrant is then being exercised, payable at the Holder's election (i) by certified or official bank check or by wire transfer to an account designated by the Company, (ii) by "cashless exercise" by surrender to the Company for cancellation of a portion of this Warrant representing that number of unissued Warrant Shares which is equal to the quotient obtained by dividing (A) the product obtained by multiplying the Exercise Price by the number of Warrant Shares being purchased upon such exercise by (B) the Per Share Market Value as of the date of such exercise, or (iii) by a combination of the foregoing methods of payment selected by the Holder. In any case where the consideration payable upon such exercise is being paid in whole or in part pursuant to the provisions of clause (ii) of this Section 3(a), such exercise shall be accompanied by written notice from the Holder of this Warrant specifying the manner of payment thereof and containing a calculation showing the number of Warrant Shares with respect to which rights are being surrendered thereunder and the net number of shares to be issued after giving effect to such surrender. "Per Share Market Value" means on any particular date (A) the closing price per share of the Common Stock on such date on the OTC Bulletin Board or another registered national stock exchange on which the Common Stock is then listed, or if there is no such price on such date, then the closing price on such exchange or quotation system on the date nearest preceding such date, or (B) if the Common Stock is not then reported by the OTC Bulletin Board or the Pink Sheets LLC (or any similar organization or agency succeeding to its functions of reporting prices), then the average of the "Pink Sheet" quotes for the relevant conversion period, as determined in good faith by the Holder, or (C) if the Common Stock is not then publicly traded, the fair market value of a share of Common Stock as determined by an Independent Appraiser selected in good faith by the Holder; provided, however, that the Company, after receipt of the determination by such Independent Appraiser, shall have the right to select an additional Independent Appraiser, in which case, the fair market value shall be equal to the average of the determinations by each such Independent Appraiser; and provided, further that all determinations of the Per Share Market Value shall be appropriately adjusted for any stock dividends, stock splits or other similar transactions during such period. The determination of fair market value by an Independent Appraiser shall be based upon the fair market value of the Company determined on a going concern basis as between a willing buyer and a willing seller and taking into account all relevant factors determinative of value, and shall be final and binding on all parties. In determining the fair market value of any shares of Common Stock, no consideration shall be given to any restrictions on transfer of the Common Stock imposed by agreement or by Federal or state securities laws, or to the existence or absence of, or any limitations on, voting rights. "Independent Appraiser" means a nationally recognized or major regional investment banking firm or firm of independent certified public accountants of recognized standing (which may be the firm that regularly examines the financial statements of the Company) that is regularly engaged in the business of appraising the capital stock or assets of corporations or other entities as going concerns, and which is not affiliated with either the Company or the Holder. (b) Upon payment of the Exercise Price pursuant to Section 3(a) of this Warrant, the Holder shall be entitled to receive a certificate for the number of Warrant Shares so purchased. Certificates for shares purchased hereunder shall be delivered to the Holder within five (5) Trading Days after the date on which this Warrant shall have been exercised as aforesaid. This Warrant shall be deemed to have been exercised and such certificate or certificates shall be deemed to have been issued, and the Holder or any other person so designated to be named therein shall be deemed to have become a holder of record of such shares for all purposes, as of the date the Warrant has been exercised, by payment to the Company of the Exercise Price and all taxes required to be paid by the Holder, if any, pursuant to Section 5 of this Warrant, prior to the issuance of such shares. "Trading Day" means (i) a day on which the Common ------------ Stock is traded on the OTC Bulletin Board, or (ii) if the Common Stock is not listed on the OTC Bulletin Board, a day on which the Common Stock is traded on any other registered national stock exchange, or (iii) if the Common Stock is not traded on the OTC Bulletin Board or any other registered national stock exchange, a day on which the Common Stock is quoted in the over-the-counter market as reported by the Pink Sheets LLC (or any similar organization or agency succeeding its functions of reporting prices); provided, however, that in the event that the Common Stock is not listed or quoted as set forth in (i), (ii) and (ii) of this Section 3(b), then Trading Day shall mean any day except Saturday, Sunday and any day which shall be a legal holiday or a day on which banking institutions in the State of New York are authorized or required by law or other government action to close. (c) If the Company fails to deliver to the Holder a certificate or certificates representing the Warrant Shares pursuant to Section 3(b) of this Warrant by the close of business on the fifth Trading Day after the date of exercise, then the Holder will have the right to rescind such exercise. In addition, if the Company fails to deliver to the Holder a certificate or certificates representing the Warrant Shares pursuant to an exercise by the close of business on the fifth Trading Day after the date of exercise, and if after such fifth Trading Day the Holder is required by its broker to purchase (in an open market transaction or otherwise) shares of Common Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise (a "Buy-In"), then the Company shall (i) pay in cash to the Holder the amount by which (x) the Holder's total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased exceeds (y) the amount obtained by multiplying (A) the number of Warrant Shares that the Company was required to deliver to the Holder in connection with the exercise at issue times (B) the price at which the sell order giving rise to such purchase obligation was executed, and (ii) at the option of the Holder, either reinstate the portion of the Warrant and equivalent number of Warrant Shares for which such exercise was not honored or deliver to the Holder the number of shares of Common Stock that would have been issued had the Company timely complied with its exercise and delivery obligations hereunder. For example, if the Holder purchases Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to an attempted exercise of Warrant Shares with an aggregate sale price giving rise to such purchase obligation of $10,000, under clause (i) of the immediately preceding sentence the Company shall be required to pay the Holder $1,000. The Holder shall provide the Company written notice indicating the amounts payable to the Holder in respect of the Buy-In, together with applicable confirmations and other evidence reasonably requested by the Company. Nothing herein shall limit a Holder's right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company's failure to timely deliver certificates representing Warrant Shares upon exercise of this Warrant as required pursuant to the terms hereof. (d) If this Warrant shall have been exercised in part, the Company shall, at the time of delivery of the certificate or certificates representing Warrant Shares, deliver to the Holder a new Warrant evidencing the rights of the Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which new Warrant shall in all other respects be identical with this Warrant. 4. No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this Warrant. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such exercise, the Company shall pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Exercise Price. 5. Charges, Taxes and Expenses. Issuance of certificates for Warrant Shares shall be made without charge to the Holder for any issue or transfer tax or other incidental expense in respect of the issuance of such certificate, all of which taxes and expenses shall be paid by the Company, and such certificates shall be issued in the name of the Holder or in such name or names as may be directed by the Holder; provided, however, that in the event certificates for Warrant Shares are to be issued in a name other than the name of the Holder, this Warrant when surrendered for exercise shall be accompanied by the Assignment Form attached hereto duly executed by the Holder; and the Company may require, as a condition thereto, the payment of a sum sufficient to reimburse it for any transfer tax incidental thereto. 6. Closing of Books. The Company will not close its stockholder books or records in any manner which prevents the timely exercise of this Warrant, pursuant to the terms hereof. 7. Transfer, Division and Combination. (a) Subject to compliance with any applicable securities laws and the conditions set forth in Section 7(e) of this Warrant, this Warrant and all rights hereunder are transferable, in whole or in part, upon surrender of this Warrant at the principal office of the Company, together with a written assignment of this Warrant substantially in the form attached hereto duly executed by the Holder or its agent or attorney and funds sufficient to pay any transfer taxes payable upon the making of such transfer. Upon such surrender and, if required, such payment, the Company shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees and in the denomination or denominations specified in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant not so assigned, and this Warrant shall promptly be cancelled. A Warrant, if properly assigned, may be exercised by a new holder for the purchase of Warrant Shares without having a new Warrant issued. (b) This Warrant may be divided or combined with other Warrants upon presentation hereof at the aforesaid office of the Company, together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the Holder or its agent or attorney. Subject to compliance with Section 7(a) of this Warrant, as to any transfer which may be involved in such division or combination, the Company shall execute and deliver a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided or combined in accordance with such notice. (c) The Company shall prepare, issue and deliver at its own expense (other than transfer taxes) the new Warrant or Warrants under this Section 7. (d) The Company agrees to maintain, at its aforesaid office, books for the registration and the registration of transfer of the Warrants. (e) If, at the time of the surrender of this Warrant in connection with any transfer of this Warrant, the transfer of this Warrant shall not be registered pursuant to an effective registration statement under the Securities Act and under applicable state securities or blue sky laws, the Company may require, as a condition of allowing such transfer (i) that the Holder or transferee of this Warrant, as the case may be, furnish to the Company a written opinion of counsel (which opinion shall be in form, substance and scope customary for opinions of counsel in comparable transactions) to the effect that such transfer may be made without registration under the Securities Act and under applicable state securities or blue sky laws, (ii) that the Holder or transferee execute and deliver to the Company an investment letter in form and substance acceptable to the Company and (iii) that the transferee be an "accredited investor" as defined in Rule 501(a) promulgated under the Securities Act. 8. No Rights as Shareholder until Exercise. This Warrant does not entitle the Holder to any voting rights or other rights as a shareholder of the Company prior to the exercise hereof. Upon the surrender of this Warrant and the payment of the aggregate Exercise Price (or by means of a cashless exercise), the Warrant Shares so purchased shall be and be deemed to be issued to such Holder as the record owner of such shares as of the close of business on the later of the date of such surrender or payment. Notwithstanding the foregoing, in the event the Company grants rights to all shareholders to purchase Common Stock, the Holder shall have the same rights as if this Warrant had been exercised immediately prior to such grant. 9. Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case of the Warrant, shall not include the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation, in lieu of such Warrant or stock certificate. 10. Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required or granted herein shall be a Saturday, Sunday or a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a Saturday, Sunday or legal holiday. 11. Adjustments of Exercise Price and Number of Warrant Shares. The initial purchase price of one share of Common Stock under this Warrant shall be $8.60 (the "Initial Exercise Price"). The number and kind of securities purchasable upon the exercise of this Warrant and the Initial Exercise Price shall be adjusted as provided for in this Section 11 (the Initial Exercise Price, and the Initial Exercise Price as thereafter then adjusted, shall be referred to herein as the "Exercise Price") and the Exercise Price from time to time shall be further adjusted as provided for in this Section 11. Upon each such adjustment of the kind and number of Warrant Shares or other securities of the Company which are purchasable hereunder, the Holder shall thereafter be entitled to purchase the number of Warrant Shares or other securities resulting from such adjustment at an Exercise Price per Warrant Share or other security obtained by multiplying the Exercise Price in effect immediately prior to such adjustment by the number of Warrant Shares purchasable pursuant hereto immediately prior to such adjustment and dividing by the number of Warrant Shares or other securities of the Company that are purchasable pursuant hereto immediately after such adjustment. Upon each adjustment of the Exercise Price, the Holder shall thereafter be entitled to receive upon exercise of this Warrant, at the Exercise Price resulting from such adjustment, the number of Warrant Shares obtained by (i) multiplying the Exercise Price effect immediately prior to such adjustment by the number of Warrant Shares purchasable hereunder immediately prior to such adjustment, and (ii) dividing the product thereof by the Exercise Price resulting from such adjustment. An adjustment made pursuant to this Section 11 shall become effective immediately after the effective date of such event retroactive to the record date, if any, for such event. This Warrant need not be changed because of any adjustment made pursuant to this Section 11. The Exercise Price shall be adjusted as follows: (a) In the case of any amendment to the Articles of Incorporation of the Company to change the rights, privileges, restrictions or conditions in respect to the Common Stock or division of the Common Stock, this Warrant shall be adjusted so as to provide that upon exercise thereof, the Holder shall receive, in lieu of each Common Stock theretofore issuable upon such exercise, the kind and amount of shares, other securities, money and property receivable upon such change or division by the Holder issuable upon such exercise had the exercise occurred immediately prior to such designation, change or division. This Warrant shall be deemed thereafter to provide for adjustments which shall be as nearly equivalent as may be practicable to the adjustments provided for in this Section 11. The provisions of this Section 11(a) shall apply in the same manner to successive reclassifications, changes, consolidations and mergers. (b) If the Company shall at any time subdivide its outstanding shares of Common Stock into a greater number of shares of Common Stock, or declare a dividend or make any other distribution upon the Common Stock payable in shares of Common Stock, the Exercise Price in effect immediately prior to such subdivision or dividend or other distribution shall be proportionately reduced, and conversely, in case the outstanding shares of Common Stock shall be combined into a smaller number of shares of Common Stock, the Exercise Price in effect immediately prior to such combination shall be proportionately increased. (c) If the Company shall (i) pay a dividend in shares of Common Stock or make a distribution in shares of Common Stock to holders of its outstanding Common Stock, (ii) subdivide its outstanding shares of Common Stock into a greater number of shares, (iii) combine its outstanding shares of Common Stock into a smaller number of shares of Common Stock, or (iv) issue any shares of its capital stock in a reclassification of the Common Stock, then the number of Warrant Shares purchasable upon exercise of this Warrant immediately prior thereto shall be adjusted so that the Holder shall be entitled to receive the kind and number of Warrant Shares or other securities of the Company which it would have owned or have been entitled to receive had such Warrant been exercised in advance thereof. No fractional shares of Common Stock shall be issued in connection with any exercise of this Warrant, but in lieu of such fractional shares, the Company shall make a cash payment therefor equal in amount to the product of the applicable fraction multiplied by the Exercise Price then in effect. 12. Reorganization, Reclassification, Merger, Consolidation or Disposition of Assets. In case the Company shall reorganize its capital, reclassify its capital stock, consolidate or merge with or into another corporation (where the Company is not the surviving corporation or where there is a change in or distribution with respect to the Common Stock of the Company), or sell, transfer or otherwise dispose of all or substantially all of its property, assets or business to another corporation and, pursuant to the terms of such reorganization, reclassification, merger, consolidation or disposition of assets, shares of common stock of the successor or acquiring corporation, or any cash, shares of stock or other securities or property of any nature whatsoever (including warrants or other subscription or purchase rights) in addition to or in lieu of common stock of the successor or acquiring corporation ("Other Property"), are to be received by or distributed to the holders of Common Stock of the Company, then the Holder shall have the right thereafter to receive upon exercise of this Warrant, the number of shares of Common Stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and Other Property receivable upon or as a result of such reorganization, reclassification, merger, consolidation or disposition of assets by a Holder of the number of shares of Common Stock for which this Warrant is exercisable immediately prior to such event, and, in any such case, appropriate provisions shall be made with respect to the rights and interests of the Holder to the end that the provisions hereof (including, without limitation, provisions for adjustments of the Exercise Price and of the number of Warrant Shares) shall thereafter be applicable, as nearly as may be, in relation to any shares of stock, securities, other evidence of equity ownership or assets thereafter deliverable upon the exercise hereof (including an immediate adjustment, by reason of such reorganization, reclassification, merger, consolidation or disposition of assets, of the Exercise Price to the value for the Common Stock reflected by the terms of such reorganization, reclassification, merger, consolidation or disposition of assets if the value so reflected is less than the Exercise Price in effect immediately prior to such reorganization, reclassification, merger, consolidation or disposition of assets). Subject to the terms of this Warrant, in the event of a reorganization, reclassification, merger or consolidation of the Company with or into another corporation or other entity as a result of which the number of shares of common stock of the surviving corporation or other entity issuable to holders of Common Stock of the Company is greater or lesser than the number of shares of Common Stock of the Company outstanding immediately prior to such reorganization, reclassification, merger or consolidation, then the Exercise Price in effect immediately prior to such reorganization, reclassification, merger or consolidation shall be adjusted in the same manner as though there were a subdivision or combination of the outstanding shares of Common Stock of the Company. The Company shall not effect any such reorganization, reclassification, merger, consolidation or disposition of assets, unless, prior to the consummation thereof, the successor corporation (if other than the Company) resulting from such reorganization, reclassification, merger or consolidation or the corporation purchasing such assets shall assume, by written instrument executed and mailed or delivered to the Holder, the obligation to deliver to the Holder such shares of stock, securities, other evidence of equity ownership or assets as, in accordance with the foregoing provisions, the Holder may be entitled to receive or otherwise acquire. If a purchase, tender or exchange offer is made to and accepted by the holders of more than fifty percent (50%) of the outstanding shares of Common Stock of the Company, the Company shall not effect any reorganization, reclassification, merger, consolidation or disposition of assets with the person having made such offer or with any affiliate of such person, unless prior to the consummation of such reorganization, reclassification, merger, consolidation or disposition of assets, the Holder shall have been given a reasonable opportunity to then elect to receive upon the exercise of this Warrant the amount of stock, securities, other evidence of equity ownership or assets then issuable with respect to the number of shares of Common Stock in accordance with such offer. The foregoing provisions of this Section 12 shall similarly apply to successive reorganizations, reclassifications, mergers, consolidations or disposition of assets. 13. Notice of Adjustment. Whenever the number of Warrant Shares or number or kind of securities or other property purchasable upon the exercise of this Warrant or the Exercise Price is adjusted, as herein provided, the Company shall give notice thereof to the Holder, which notice shall state the number of Warrant Shares (and other securities or property) purchasable upon the exercise of this Warrant and the Exercise Price of such Warrant Shares (and other securities or property) after such adjustment, setting forth a brief statement of the facts requiring such adjustment and setting forth the computation by which such adjustment was made. 14. Notice of Corporate Action. If at any time: (a) the Company shall take a record of the holders of its Common Stock for the purpose of entitling them to receive a dividend or other distribution, or any right to subscribe for or purchase any evidences of its indebtedness, any shares of stock of any class or any other securities or property, or to receive any other right, or (b) there shall be any capital reorganization of the Company, any reclassification or recapitalization of the capital stock of the Company or any consolidation or merger of the Company with, or any sale, transfer or other disposition of all or substantially all the property, assets or business of the Company to, another corporation, or (c) there shall be a voluntary or involuntary dissolution, liquidation or winding up of the Company; then, in any one or more of such cases, the Company shall give to Holder (i) at least 20 calendar days' prior written notice of the date on which a record date shall be selected for such dividend, distribution or right or for determining rights to vote in respect of any such reorganization, reclassification, merger, consolidation, sale, transfer, disposition, liquidation or winding up, and (ii) in the case of any such reorganization, reclassification, merger, consolidation, sale, transfer, disposition, dissolution, liquidation or winding up, at least 20 calendar days' prior written notice of the date when the same shall take place. Such notice in accordance with the foregoing clause also shall specify (i) the date on which any such record is to be taken for the purpose of such dividend, distribution or right, the date on which the holders of Common Stock shall be entitled to any such dividend, distribution or right, and the amount and character thereof, and (ii) the date on which any such reorganization, reclassification, merger, consolidation, sale, transfer, disposition, dissolution, liquidation or winding up is to take place and the time, if any such time is to be fixed, as of which the holders of Common Stock shall be entitled to exchange their Warrant Shares for securities or other property deliverable upon such disposition, dissolution, liquidation or winding up. Each such written notice shall be sufficiently given if addressed to Holder at the last address of Holder appearing on the books of the Company and delivered in accordance with Section 18(d). 15. Authorized Shares. The Company covenants that, during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a sufficient number of shares to provide for the issuance or transfer of the Warrant Shares upon the exercise of any purchase rights under this Warrant and will procure at its expense upon such reservation of shares the listing thereof (subject to issuance or notice of issuance) on all stock exchanges on which the Common Stock is then listed or inter-dealer trading systems on which the Common Stock is then traded. The Company further covenants that its issuance of this Warrant shall constitute full authority to its officers who are charged with the duty of executing stock certificates to execute and issue the necessary certificates for the Warrant Shares upon the exercise of the purchase rights under this Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law or regulation, or of any requirements of the Trading Market upon which the Common Stock may be listed or inter-dealer trading systems on which the Common Stock is then traded. Except and to the extent as waived or consented to by the Holder, the Company shall not by any action, including, without limitation, amending its certificate of incorporation or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant against impairment. Without limiting the generality of the foregoing, the Company will (a) not increase the par value of any Warrant Shares above the amount payable therefor upon such exercise immediately prior to such increase in par value, (b) take all such action as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant Shares upon the exercise of this Warrant, and (c) use commercially reasonable efforts to obtain all such authorizations, exemptions or consents from any public regulatory body having jurisdiction thereof as may be necessary to enable the Company to perform its obligations under this Warrant. Before taking any action which would result in an adjustment in the number of Warrant Shares for which this Warrant is exercisable or in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof. 16. Registration Rights. The Warrant Shares shall be entitled to the registration rights and piggy-back registration rights as set forth more fully in that certain Placement Agreement, dated October 19, 2007, between the Company and the Holder. Such registration rights and piggy-back registration rights are incorporated herein by this reference as if such provisions had been set forth herein in full. 17. Timely Reports. The Company agrees to use its best efforts to file timely all reports required to be filed pursuant to Sections 13 or 15 of the Securities Exchange Act of 1934, as amended, and to provide such information as will permit the Holder to sell this Warrant or any Warrant Shares in accordance with Rule 144 under the Securities Act. 18. Miscellaneous. (a) Jurisdiction. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be determined in accordance with the provisions of the Purchase Agreement. (b) Restrictions. The Holder acknowledges that the Warrant Shares acquired upon the exercise of this Warrant, if not registered, will have restrictions upon resale imposed by state and Federal securities laws. (c) Nonwaiver and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder shall operate as a waiver of such right or otherwise prejudice Holder's rights, powers or remedies, notwithstanding all rights hereunder terminate on the Termination Date. If the Company willfully and knowingly fails to comply with any provision of this Warrant, which results in any material damages to the Holder, the Company shall pay to Holder such amounts as shall be sufficient to cover any costs and expenses including, but not limited to, reasonable attorneys' fees, including those of appellate proceedings, incurred by Holder in collecting any amounts due pursuant hereto or in otherwise enforcing any of its rights, powers or remedies hereunder. (d) Notices. Any notice, request or other document required or permitted to be given or delivered to the Holder by the Company shall be delivered in accordance with the notice provisions of the Purchase Agreement; provided upon any permitted assignment of this Warrant, the assignee shall promptly provide the Company with its contact information. (e) Limitation of Liability. No provision hereof, in the absence of any affirmative action by Holder to exercise this Warrant or purchase Warrant Shares, and no enumeration herein of the rights or privileges of Holder, shall give rise to any liability of Holder for the purchase price of any Common Stock or as a stockholder of the Company, whether such liability is asserted by the Company or by creditors of the Company. (f) Remedies. Holder, in addition to being entitled to exercise all rights granted by law, including recovery of damages, will be entitled to specific performance of its rights under this Warrant. The Company agrees that monetary damages would not be adequate compensation for any loss incurred by reason of a breach by it of the provisions of this Warrant and hereby agrees to waive the defense in any action for specific performance that a remedy at law would be adequate. (g) Successors and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced hereby shall inure to the benefit of and be binding upon the successors of the Company and the successors and permitted assigns of Holder. The provisions of this Warrant are intended to be for the benefit of all Holders from time to time of this Warrant and shall be enforceable by any such Holder or holder of Warrant Shares. (h) Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company and the Holder. (i) Severability. Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of such provisions or the remaining provisions of this Warrant. (j) Headings. The headings used in this Warrant are for the convenience of reference only and shall not, for any purpose, be deemed a part of this Warrant. ******************** IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto duly authorized. Dated: October 19, 2007 PURE Bioscience By:/s/ MICHAEL L. KRALL ----------------------- Name: MICHAEL L. KRALL Title: PRESIDENT NOTICE OF EXERCISE To: PURE Bioscience (1) The undersigned hereby elects to purchase ________ Warrant Shares of PURE Bioscience pursuant to the terms of the attached Warrant, and tenders herewith payment of the applicable exercise price in full, together with all applicable transfer taxes, if any. (2) Payment shall take the form of (check applicable box): [ ] in lawful money of the United States; or [ ] the cancellation of such number of Warrant Shares as is necessary, in accordance Section 3(a) of the attached Warrant, to exercise this Warrant with respect to the number of Warrant Shares listed above. (3) Please issue a certificate or certificates representing said Warrant Shares in the name of the undersigned or in such other name as is specified below: _____________________________________ The Warrant Shares shall be delivered to the following: _____________________________________ _____________________________________ _____________________________________ (4) Accredited Investor. The undersigned is an "accredited investor" as defined in Regulation D promulgated under the Securities Act of 1933, as amended. [PURCHASER] By: ______________________________ Name: Title: Dated: ________________________ ASSIGNMENT FORM (To assign the foregoing warrant, execute this form and supply required information. Do not use this form to exercise the warrant.) FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to _______________________________________________ whose address is _______________________________________________________________________________ _______________________________________________________________________________ Dated: ______________, _______ Holder's Signature: _____________________________ Holder's Address: _____________________________ _____________________________ Signature Guaranteed: ___________________________________________ NOTE: The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant, without alteration or enlargement or any change whatsoever, and must be guaranteed by a bank or trust company. Officers of corporations and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant.