Document:

Form of Warrant to Purchase Common Stock

 EXHIBIT 4.2 
 THE WARRANT AND THE SHARES OF COMMON STOCK REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, OR HYPOTHECATED UNLESS AND UNTIL REGISTERED
UNDER THE ACT OR, IN THE OPINION OF COUNSEL, IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER OR HYPOTHECATION IS IN COMPLIANCE THEREWITH. 
 ALPHA INNOTECH CORP. 
 WARRANT TO PURCHASE «SHARE_» SHARES

 OF COMMON STOCK 
 Warrant No. W-[    ] 
 THIS CERTIFIES THAT, for value received,
                     and its assigns are entitled to subscribe for and purchase     
(    ) shares (as adjusted pursuant to Section 4 hereof, the “Shares”) of the fully paid and nonassessable common stock, par value $0.01 per share (“Common Stock”), of Alpha Innotech
Corp., a Delaware corporation (the “Company”), at the price of $1.20 per share (such price and such other price as shall result, from time to time, from the adjustments specified in Section 4 hereof is herein referred to as the
“Warrant Price”), subject to the provisions and upon the terms and conditions set forth herein and in the Securities Purchase Agreement, dated as of even date herewith, by and among the Company and the initial holder of this Warrant
(the “Securities Purchase Agreement”). As used herein, the term “Date of Grant” means July     , 2006. As used herein, the term “Warrant” shall be deemed to include any warrants
issued in exchange or upon transfer or partial exercise of this Warrant unless the context clearly requires otherwise. 
 1. Term. The
purchase right represented by this Warrant is exercisable, in whole or in part, at any time and from time to time from the six-month anniversary of the Date of Grant through July     , 2016. 
 2. Method of Exercise; Payment; Issuance of New Warrant. 
 (a) Subject to Section 1 hereof, the purchase right represented by this Warrant may be exercised by the holder hereof, in whole or in part and from time to time, at the election of the holder hereof, by
(x) the surrender of this Warrant (with the notice of exercise substantially in the form attached hereto as Exhibit A-1 duly completed and executed) at the principal office of the Company and by the payment to the Company, by
certified or bank check, or by wire transfer to an account designated by the Company (“Wire Transfer”) of an amount equal to the then applicable Warrant Price multiplied by the number of Shares then being purchased or (y) if in
connection with a registered public offering of the Company’s securities, the surrender of this Warrant (with the notice of exercise form attached hereto as Exhibit A-2 duly completed and executed) at the principal office of the
Company together with notice of arrangements reasonably satisfactory to the Company for payment to the Company either by certified or bank 

 
check or by Wire Transfer from the proceeds of the sale of shares to be sold by the holder in such public offering of an amount equal to the then applicable
Warrant Price per share multiplied by the number of Shares then being purchased. The person or persons in whose name(s) any certificate(s) representing the Shares shall be issuable upon exercise of this Warrant shall be deemed to have become the
holder(s) of record of, and shall be treated for all purposes as the record holder(s) of, the Shares represented thereby (and such Shares shall be deemed to have been issued) immediately prior to the close of business on the date or dates upon which
this Warrant is exercised. As soon as practicable after the exercise of this Warrant and in any event within three trading days thereafter, upon the terms and subject to the conditions of this Warrant, the Company at its expense will cause to be
issued in the name of and delivered to the holder, or as the holder may direct to a broker or other persons, a certificate or certificates for the number of Shares to which the holder shall be entitled on such exercise, in such denominations as may
be requested by the holder. In lieu of delivering physical certificates for the Shares issuable upon any exercise of this Warrant, provided the Company’s transfer agent is participating in the Depository Trust Company (“DTC”) Fast
Automated Securities Transfer (“FAST”) program, and that any legend upon the certificates for the Shares shall have been removed pursuant to Section 7 below, upon request of the holder, the Company shall use commercially reasonable
efforts to cause its transfer agent electronically to transmit such Shares by crediting the account of the holder’s broker with DTC through its Deposit Withdrawal Agent Commission system (provided that the same time limitations herein as for
stock certificates shall apply). 
 (b) On and after the effective date of the Registration Statement (as defined in the Securities Purchase
Agreement) through the Term of this Warrant, at any time that the Registration Statement or a successor registration statement is not effective, in lieu of exercising this Warrant for cash, the holder may elect to receive shares equal to the value
of this Warrant (or the portion thereof being exercised) by surrender of this Warrant at the principal office of the Company together with notice of such election substantially in the form attached hereto as Exhibit A-1 duly completed and
executed (“Net Exercise”). The Company shall issue to a holder who Net Exercises a number of Warrant Shares computed using the following formula: 
  

							
	X	 	=	 	 Y (A - B)
	 	
	 	 	A	 	

 Where 
  

					
		 	X =	 	The number of Warrant Shares to be issued to the holder.
			
		 	Y =	 	The number of Warrant Shares purchasable under this Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being cancelled (at the date of such
calculation).
			
		 	A =	 	The fair market value of one (1) Warrant Share (at the date of such calculation).
			
		 	B =	 	The Warrant Price (as adjusted to the date of such calculation (the “Determination Date”)).

  

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 For purposes of this Section 2, the fair market value of a Warrant Share shall mean: 
  

	 	(i)	If traded on a securities exchange, the Nasdaq National Market or Nasdaq SmallCap Market, the fair market value of the Common Stock shall be deemed to be the average of the closing
prices of the Common Stock on such exchange or market over the 10 trading days immediately prior to the Determination Date; 

  

	 	(ii)	If traded on the Nasdaq Stock Market (other than the Nasdaq National Market or Nasdaq SmallCap Market) or other over-the-counter system, the fair market value of the Common Stock
shall be deemed to be the average of the closing bid prices of the Common Stock over the 30 trading days immediately prior to the Determination Date; and 

  

	 	(iii)	If there is no public market for the Common Stock, the fair market value shall be the price per Warrant Share that the Company could obtain from a willing buyer for Warrant Shares
sold by the Company from authorized but unissued Warrant Shares, as such prices shall be determined in good faith by the Company’s Board of Directors. 

 In the event that this Warrant is exercised pursuant to this Section 2 in connection with the consummation of the Company’s sale of its Common Stock or other securities pursuant to a registration statement
under the Securities Act of 1933, as amended (other than a registration statement relating either to sale of securities to employees of the Company pursuant to its stock option, stock purchase or similar plan or a Rule 145 transaction)
(“Public Offering”), the fair market value per Warrant Share shall be the per share offering price to the public of the Public Offering. 
 3. Stock Fully Paid; Reservation of Shares. All Shares that may be issued upon the exercise of the rights represented by this Warrant will, upon issuance pursuant to the terms and conditions herein, be fully
paid and nonassessable, and free from all taxes, liens and charges with respect to the issue thereof. During the period within which the rights represented by this Warrant may be exercised, the Company will at all times have authorized, and reserved
for the purpose of the issue upon exercise of the purchase rights evidenced by this Warrant, a sufficient number of shares of its Common Stock to provide for the exercise of the rights represented by this Warrant. 
 4. Adjustment of Warrant Price and Number of Shares. The number and kind of securities purchasable upon the exercise of this Warrant and the
Warrant Price shall be subject to adjustment from time to time upon the occurrence of certain events, as follows: 
 (a) Fundamental
Transaction. If, at any time while this Warrant is outstanding, (A) the Company effects any merger or consolidation of the Company with or into another entity, (B) the Company effects any sale of all or substantially all of its assets
in one or a 

  

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series of related transactions, (C) any tender offer or exchange offer (whether by the Company or another person or entity) is completed pursuant to
which holders of Common Stock are permitted to tender or exchange their shares for other securities, cash or property, or (D) the Company effects any reclassification of the Common Stock or any compulsory share exchange pursuant to which the
Common Stock is effectively converted into or exchanged for other securities, cash or property (in any such case, a “Fundamental Transaction”), then, upon any subsequent exercise of this Warrant, the holder shall have the right to
receive, for each Share that would have been issuable upon such exercise immediately prior to the occurrence of such Fundamental Transaction, at the option of the holder, (a) 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 any additional consideration (the “Alternate Consideration”) receivable upon or as a result of such reorganization,
reclassification, merger, consolidation or disposition of assets by a holder of the number of Shares for which this Warrant is exercisable immediately prior to such event or (b) if the Company is acquired in an all cash transaction, cash equal
to the value of this Warrant as determined in accordance with the Black Scholes Pricing Model (as hereafter defined). For purposes of any such exercise, the determination of the Warrant Price shall be appropriately adjusted to apply to such
Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such Fundamental Transaction, and the Company shall apportion the Warrant Price among the Alternate Consideration in a
reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the
holder shall be given the same choice as to the Alternate Consideration it receives upon any exercise of this Warrant following such Fundamental Transaction. To the extent necessary to effectuate the foregoing provisions, any successor to the
Company or surviving entity in such Fundamental Transaction shall issue to the holder a new warrant consistent with the foregoing provisions and evidencing the holder’s right to exercise such warrant into Alternate Consideration; provided that
this Warrant shall have been cancelled or amended to the extent such cancellation or amendment is necessary so that such new warrant does not unjustly or disproportionately enrich the holder of the new warrant relative to a holder of the number of
Shares for which this Warrant is exercisable immediately prior to such event. The terms of any agreement pursuant to which a Fundamental Transaction is effected shall include terms requiring any such successor or surviving entity to comply with the
provisions of this Section 4(a) and insuring that this Warrant (or any such replacement security) will be similarly adjusted upon any subsequent transaction analogous to a Fundamental Transaction. For purposes hereof, “Black Scholes
Pricing Model” means the value determined using the Black Scholes pricing model assuming that the Warrant had been assumed by the acquiring company and determining volatility on an implied basis using pricing information for trading of options
in the stock of the acquiring company as of the date of determination or, if no such pricing information is available, determining volatility on an historical basis for the 12-month period prior to the date of determination. 
  

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 (b) Subdivision or Combination of Shares. If the Company at any time while this Warrant remains
outstanding and unexpired shall subdivide or combine its outstanding shares of Common Stock, the Warrant Price shall be proportionately decreased and the number of Shares issuable hereunder shall be proportionately increased in the case of a
subdivision or the Warrant Price shall be proportionately increased and the number of Shares issuable hereunder shall be proportionately decreased in the case of a combination. 
 (c) Stock Dividends and Other Distributions. If the Company at any time while this Warrant is outstanding and unexpired shall pay a dividend or
make a distribution to all of its stockholders with respect to its Common Stock payable in Common Stock, then the Warrant Price shall be adjusted, from and after the date of determination of stockholders entitled to receive such dividend or
distribution, to that price determined by multiplying the Warrant Price in effect immediately prior to such date of determination by a fraction (A) the numerator of which shall be the total number of shares of Common Stock outstanding
immediately prior to such dividend or distribution, and (B) the denominator of which shall be the total number of shares of Common Stock outstanding immediately after such dividend or distribution. If the Company at any time while this Warrant
is outstanding and unexpired shall pay a dividend or make a distribution to all of its stockholders with respect to its Common Stock, any (i) cash (excluding cash dividends payable solely out of earnings or earned surplus of the Company) or
(ii) additional stock, rights, warrants or other securities or property (other than cash) by way of dividend, other than additional shares of Common Stock, then and in each such case the holder, on the exercise hereof as provided in
Section 2, shall be entitled to receive the amount of stock, rights, warrants and property (including cash in the case referred to in subdivision (i) above) which the holder would hold on the date of such exercise if on the date of such
action (or the record date therefor) the holder had been the holder of record of the number of shares of Common Stock for which this Warrant is exercisable as provided in Section 2 and had thereafter, during the period from the date thereof to
and including the date of such exercise, retained such shares and all such other or additional stock, rights, warrants and property (including cash in the case referred to in subdivision (i) above) receivable by the holder as aforesaid during
such period. 
 (d) Adjustment of Number of Shares. Upon each adjustment in the Warrant Price, the number of Shares purchasable
hereunder shall be adjusted, to the nearest whole share, to the product obtained by multiplying the number of Shares purchasable immediately prior to such adjustment in the Warrant Price by a fraction, the numerator of which shall be the Warrant
Price immediately prior to such adjustment and the denominator of which shall be the Warrant Price immediately thereafter. 
 5. Notice of
Adjustments. Whenever the Warrant Price or the number of Shares purchasable hereunder shall be adjusted pursuant to Section 4 hereof, the Company shall make a certificate signed by its chief executive officer, chief financial officer or any
vice president setting forth, in reasonable detail, the event requiring the adjustment, the amount of the adjustment, the method by which such adjustment was calculated, and the Warrant Price and the number of Shares purchasable hereunder after
giving effect to such adjustment, and shall cause copies of such certificate to be mailed (without regard to Section 14 hereof, by first class mail, postage prepaid) to the holder of this Warrant. 
  

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 6. Fractional Shares. No fractional shares of Common Stock will be issued in connection with any
exercise hereunder, but in lieu of such fractional shares the Company shall make a cash payment therefor based on the fair market value of the Common Stock on the date of exercise as determined pursuant to the penultimate sentence of
Section 2(b) above. 
 7. Compliance with Securities Act; Disposition of Warrant or Shares of Common Stock. 
 (a) Compliance with Securities Act. The holder of this Warrant, by acceptance hereof, agrees that such holder will not offer, sell or otherwise
dispose of this Warrant, or any Shares except under circumstances which will not result in a violation of the Act or any applicable state securities laws. Upon exercise of this Warrant, unless the Shares being acquired are registered under the Act
and any applicable state securities laws or an exemption from such registration is available, the holder hereof shall confirm in writing that the Shares so purchased are not being acquired with a view toward distribution or resale in violation of
the Act and shall confirm such other matters related thereto as may be reasonably requested by the Company. This Warrant and all Shares issued upon exercise of this Warrant (unless registered under the Act and any applicable state securities laws)
shall be stamped or imprinted with a legend in substantially the following form: 
 “THE WARRANT AND THE SHARES OF COMMON STOCK
REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL, IN
FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR TRANSFER OR HYPOTHECATION IS IN COMPLIANCE THEREWITH.” 
 Said legend shall be removed by the Company, upon the request of a holder, at such time as the restrictions on the transfer of the applicable security shall have terminated. In addition, in connection with the issuance of this Warrant, the
holder specifically represents to the Company by acceptance of this Warrant as follows: 
 (1) The holder is aware of the
Company’s business affairs and financial condition, and has acquired information about the Company sufficient to reach an informed and knowledgeable decision to acquire this Warrant. The holder is acquiring this Warrant for its own account and
not with a view to, or for the resale in connection with, any “distribution” thereof in violation of the Act. 
  

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 (2) The holder understands that this Warrant has not been registered under the Act in
reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of the holder’s investment as expressed herein. 
 (3) The holder further understands that this Warrant must be held indefinitely unless subsequently registered under the Act and qualified
under any applicable state securities laws, or unless exemptions from registration and qualification are otherwise available. The holder is aware of the provisions of Rule 144, promulgated under the Act. 
 (4) The holder is an “accredited investor” as such term is defined in Rule 501 of Regulation D promulgated under the Act.

 (b) Disposition of Warrant or Shares. With respect to any offer, sale or other disposition of this Warrant or any Shares acquired
pursuant to the exercise of this Warrant prior to registration of such Warrant or Shares, the holder hereof agrees to give written notice to the Company prior thereto, describing briefly the manner thereof, together with a written opinion of such
holder’s counsel, or other evidence reasonably satisfactory to the Company, to the effect that such offer, sale or other disposition may be effected without registration or qualification (under the Act as then in effect or any federal or state
securities law then in effect) of this Warrant or the Shares and indicating whether or not under the Act certificates for this Warrant or the Shares to be sold or otherwise disposed of require any restrictive legend as to applicable restrictions on
transferability in order to ensure compliance with such law. Upon receiving such written notice and reasonably satisfactory opinion or other evidence, the Company, as promptly as practicable but no later than fifteen (15) days after receipt of
the written notice, shall notify such holder that such holder may sell or otherwise dispose of this Warrant or such Shares, all in accordance with the terms of the notice delivered to the Company. If a determination has been made pursuant to this
Section 8(b) that the opinion of counsel for the holder or other evidence is not reasonably satisfactory to the Company, the Company shall so notify the holder promptly with details thereof after such determination has been made.
Notwithstanding the foregoing, this Warrant or such Shares may, as to such federal laws, be offered, sold or otherwise disposed of in accordance with Rule 144 or 144A under the Act, provided that the Company shall have been furnished with such
information as the Company may reasonably request to provide a reasonable assurance that the provisions of Rule 144 or 144A have been satisfied. Each certificate representing this Warrant or the Shares thus transferred (except a transfer pursuant to
Rule 144) shall bear a legend as to the applicable restrictions on transferability in order to ensure compliance with such laws, unless in the aforesaid opinion of counsel for the holder, such legend is not required in order to ensure compliance
with such laws. The Company may issue stop transfer instructions to its transfer agent in connection with such restrictions. 
 (c)
Applicability of Restrictions. Neither any restrictions of any legend described in this Warrant nor the requirements of Section 7(b) above shall apply to any transfer or grant of a security interest in, this Warrant (or the shares of
Common Stock obtainable upon exercise thereof) or any part hereof (i) to a partner of the holder if the holder is a 

  

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partnership or to a member of the holder if the holder is a limited liability company, (ii) to a partnership of which the holder is a partner or a
limited liability company of which the holder is a member, or (iii) to any affiliate of the holder if the holder is a corporation; provided, however, in any such transfer, if applicable, the transferee shall on the Company’s request agree
in writing to be bound by the terms of this Warrant as if an original holder hereof. 
 8. Rights as Stockholders. No holder of this
Warrant, as such, shall be entitled to vote or receive dividends or be deemed the holder of Common Stock or any other securities which may at any time be issuable on the exercise hereof for any purpose, nor shall anything contained herein be
construed to confer upon the holder of this Warrant, as such, any of the rights of a stockholder of the Company or any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to receive
notice of meetings, or to receive dividends or subscription rights or otherwise until this Warrant shall have been exercised and the Shares purchasable upon the exercise hereof shall have become deliverable, as provided herein. 
 9. Registration Rights. The Company grants registration rights to the holder of this Warrant for any shares of Common Stock of the Company
obtained upon exercise hereof as set forth in the Securities Purchase Agreement. 
 10. Mergers. The Company shall provide the holder
of this Warrant with at least twenty (20) days’ written notice prior to the closing thereof of the terms and conditions of any of the following transactions: (i) the sale, lease, exchange, conveyance or other disposition of all or
substantially all of the Company’s property or business or (ii) its merger into or consolidation with any other corporation in which the Company is not the surviving entity (other than a wholly-owned subsidiary of the Company) or
(iii) any transaction (including a merger or other reorganization) or series of related transactions, in which more than 50% of the voting power of the Company is disposed of; provided, however, that any SEC filing made by the Company on Edgar
related to any of the transactions referenced in clauses (i), (ii) or (iii) shall serve as notice for the purpose of this Section 10. 
 11. Modification and Waiver. This Warrant and any provision hereof may be changed, waived, discharged or terminated only by an instrument in writing signed by the party against which enforcement of the same is
sought. 
 12. Notices. All notices, requests, consents and other communications hereunder shall be in writing, shall be mailed
(A) if within the United States by first-class registered or certified airmail, or nationally recognized overnight express courier, postage prepaid, or by facsimile or electronic mail, or (B) if delivered from outside the United States, by
International Federal Express (or other recognized international express courier) or facsimile, and shall be deemed given (i) if delivered by first-class registered or certified mail, three business days after so mailed, (ii) if delivered
by nationally recognized overnight carrier, one business day after so mailed, (iii) if delivered by International Federal Express (or other recognized international express courier), two business days after so mailed, or (iv) if delivered
by facsimile or electronic mail, upon electronic confirmation of receipt and shall be delivered as addressed as follows: 
  

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 if to the Company, to: 
 Alpha Innotech Corp. 
 2401 Merced Street 
 San Leandro,
CA 94577 
 Phone: (510) 483-9620 
 Attn: Chief Financial
Officer 
 with a copy to: 
 Heller Ehrman LLP 
 75 Middlefield Street 
 Menlo Park, CA 94025 
 Phone: (650) 324-7000 
 Attn: Marina Remennik 
 if to the holder, at its address as shown on the books of the Company. 
 13. Binding Effect on Successors. This Warrant shall be binding upon any corporation succeeding the Company by merger, consolidation or acquisition of all or substantially all of the Company’s assets, and
all of the obligations of the Company relating to the Shares issuable upon the exercise or conversion of this Warrant shall survive the exercise, conversion and termination of this Warrant and all of the covenants and agreements of the Company shall
inure to the benefit of the successors and assigns of the holder hereof. 
 14. Lost Warrants or Stock Certificates. The Company
covenants to the holder hereof that, upon receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant or any stock certificate and, in the case of any such loss, theft or destruction, upon
receipt of an indemnity reasonably satisfactory to the Company, or in the case of any such mutilation upon surrender and cancellation of such Warrant or stock certificate, the Company will make and deliver a new Warrant or stock certificate, of like
tenor, in lieu of the lost, stolen, destroyed or mutilated Warrant or stock certificate. 
 15. Descriptive Headings. The descriptive
headings of the several paragraphs of this Warrant are inserted for convenience only and do not constitute a part of this Warrant. The language in this Warrant shall be construed as to its fair meaning without regard to which party drafted this
Warrant. 
 16. Governing Law. This Warrant shall be construed and enforced in accordance with, and the rights of the parties shall be
governed by, the laws of the State of California. 
 17. Survival of Agreements. All agreements of the Company and the holder hereof
contained herein shall survive indefinitely until, by their respective terms, they are no longer operative. 
  

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 18. Remedies. In case any one or more of the covenants and agreements contained in this Warrant
shall have been breached, the holders hereof (in the case of a breach by the Company), or the Company (in the case of a breach by a holder), may proceed to protect and enforce their or its rights either by suit in equity and/or by action at law,
including, but not limited to, an action for damages as a result of any such breach and/or an action for specific performance of any such covenant or agreement contained in this Warrant. 
 19. No Impairment of Rights. The Company will not, by amendment of its certificate of incorporation or through any other means, 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 action as may be necessary or appropriate in order to protect the
rights of the holder of this Warrant against impairment. 
 20. Severability. Whenever possible, each provision of this Warrant shall
be interpreted in such a manner as to be valid, legal and enforceable under all applicable laws and regulations. If, however, any provision of this Warrant shall be invalid, illegal or unenforceable under any such law or regulation in any
jurisdiction, it shall, as to such jurisdiction, be deemed modified to conform to the minimum requirements of such law or regulation, or, if for any reason it is not deemed to be so modified, it shall be invalid, illegal or unenforceable only to the
extent of such invalidity, illegality or limitation on enforceability without affecting the remaining provisions of this Warrant or the validity, legality or enforceability of such provision in any other jurisdiction. 
 21. Entire Agreement; Modification. This Warrant constitutes the entire agreement between the parties pertaining to the subject matter contained
in it and supersedes all prior and contemporaneous agreements, representations, and undertakings of the parties, whether oral or written, with respect to such subject matter; provided, however, that any non-disclosure agreement signed by the holder
of this Warrant shall survive the execution of this Warrant. 
 [Remainder of page intentionally left blank] 
  

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 IN WITNESS WHEREOF, the parties have executed this Warrant as of the date first written above.

  

			
	ALPHA INNOTECH CORP.
		
	By:	 	  

	Name:	 	Haseeb Chaudhry
	Title:	 	Chief Executive Officer

 Address: 2401 Merced Street 
 San Leandro, CA 94577 
  

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 Exhibit A-1 
 Notice of Exercise 
  

	1.	The undersigned hereby: 

  

					
		 	[    ]	 	elects to purchase              shares of Common Stock of the Company pursuant to the terms of the attached Warrant, and
tenders herewith payment of the purchase price of such shares in full.
			
		 	[    ]	 	elects to exercise its issuance rights pursuant to Section 2(b) of the attached Warrant with respect to              shares
of Common Stock of the Company.

  

	2.	Please issue a certificate or certificates representing said shares in the name of the undersigned or in such other name or names as are specified below: 

 

			
		 	  

		 	(Name)
		
		 	  

		 	  

		 	  

		 	(Address)

  

	3.	The undersigned represents that the aforesaid shares are being acquired for the account of the undersigned for investment and not with a view to, or for resale in connection with,
the distribution thereof and that the undersigned has no present intention of distributing or reselling such shares, all except as in compliance with applicable securities laws. 

  

			
	  

	(Signature)
		
	Dated:	 	  

 Exhibit A-2 
 Notice of Exercise 
  

	1.	Contingent upon and effective immediately prior to the closing (“Closing”) of the Company’s public offering contemplated by the Registration Statement filed
with the Securities and Exchange Commission filed on                     , the undersigned hereby: 

  

					
		 	[    ]	 	elects to purchase              shares of Common Stock of the Company (or such lesser number of shares as may be sold on
behalf of the undersigned at the Closing) pursuant to the terms of the attached Warrant.

  

	2.	Please deliver to the custodian for the selling stockholders a stock certificate representing such             
shares. 

  

	3.	The undersigned has instructed the custodian for the selling stockholders to deliver to the Company $            
or, if less, the net proceeds due the undersigned from the sale of shares in the aforesaid public offering. If such net proceeds are less than the purchase price for such shares, the undersigned agrees to deliver the difference to the Company prior
to the Closing. 

  

	
	  

	(Name)
	
	  

	  

	  

	(Address)

  

			
	Dated:Form of Securities Purchase Agreement

 EXHIBIT 10.1 
 ALPHA INNOTECH CORP. 
 SECURITIES PURCHASE AGREEMENT 
 This SECURITIES PURCHASE AGREEMENT (this “Agreement”), is made and entered
into as of July __, 2006, by and among Alpha Innotech Corp., a Delaware corporation (the “Company”), and the purchasers listed on Schedule A attached hereto (collectively, the “Purchasers” and individually, a
“Purchaser”). 
 1. Authorization of Sale of the Securities. Subject to the terms and conditions of this Agreement, the
Company has authorized the sale of (i) the senior convertible notes of the Company in the form attached hereto as Exhibit A (together with any senior convertible notes issued in replacement thereof in accordance with the terms thereof, the
“Notes”), which Notes shall be convertible into shares of the Company’s Common Stock, par value $0.01 per share (the “Common Stock”), in accordance with the terms of the Note, as well as (ii) warrants to purchase Common
Stock of the Company in the form attached hereto as Exhibit B (the “Warrants”). The Notes, the Warrants and the securities issuable upon conversion or exercise thereof (the “Conversion Shares”) are hereinafter referred to as the
“Securities”. 
 2. Agreement to Sell and Purchase the Securities. 
 2.1 Purchase and Sale. Subject to the terms and conditions of this Agreement, each Purchaser severally agrees to purchase, and the Company agrees
to sell and issue to each Purchaser, at the Closing (as defined below) a principal amount of Notes and a Warrant to purchase that number of shares of Common Stock set forth opposite such Purchaser’s name on Schedule A attached hereto.

 2.2 Purchase Price. The purchase price for each Purchaser (the “Purchase Price”) of the Notes to be purchased by each
such Purchaser at the Closing shall be equal to 100% of principal amount of Notes being purchased by such Purchaser at the Closing. 
 2.3
Form of Payment. On the Closing Date, (i) each Purchaser shall pay its Purchase Price to the Company for the Notes to be issued and sold to such Purchaser at the Closing, by wire transfer of immediately available funds in accordance with
the Company’s written wire instructions, and (ii) the Company shall deliver to each Purchaser the Notes (in the principal amounts as such Purchaser shall request or, if no such request is made, a single Note with a principal amount equal
to the aggregate principal amount of Notes to be purchased by such Purchaser) which such Purchaser is then purchasing, and a Warrant duly executed on behalf of the Company and registered in the name of such Purchaser or its designee. 
 2.4 Closing Date. The Closing shall occur on the date hereof (the “Closing Date”). 
 2.5 Legends. Certificates evidencing the Securities will contain the following legend, as applicable, until such time as they are not required:

 [NEITHER THESE SECURITIES NOR THE SECURITIES ISSUABLE UPON CONVERSION OR EXERCISE OF THESE SECURITIES HAVE BEEN REGISTERED] 

 
[THESE SECURITIES HAVE NOT 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. 
 3. Representations, Warranties and Covenants of the Company.
The Company hereby represents and warrants to the Purchasers as follows: 
 3.1 Organization. The Company is duly organized and validly
existing in good standing under the laws of the jurisdiction of its organization. Each of the Company and its Subsidiaries (as defined in Rule 405 under the Securities Act) has full power and authority to own, operate and occupy its properties
and to conduct its business as presently conducted and as described in the documents filed by the Company under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), since the end of its most recently completed fiscal year
through the date hereof (the “Exchange Act Documents”) and is registered or qualified to do business and in good standing in each jurisdiction in which the nature of the business conducted by it or the location of the properties owned or
leased by it requires such qualification and where the failure to be so qualified would have a material adverse effect upon the condition (financial or otherwise) of the Company and its Subsidiaries, considered as one enterprise (a “Material
Adverse Effect”), and no proceeding has been instituted in any such jurisdiction, revoking, limiting or curtailing, or seeking to revoke, limit or curtail, such power and authority or qualification. 
 3.2 Due Authorization and Valid Issuance. The Company has all requisite power and authority to execute, deliver and perform its obligations under
this Agreement and each of the documents, agreements or instruments entered into in connection with the transactions contemplated by this Agreement (the “Transaction Documents”), and the Transaction Documents have been duly authorized and
validly executed and delivered by the Company and constitute legal, valid and binding agreements of the Company enforceable against the Company in accordance with their terms, except as rights to indemnity and contribution may be limited by state or
federal securities laws or the public policy underlying such laws. The issuance of the Notes and the Warrants is duly authorized and, upon issuance of the Notes and the Warrants in accordance with the terms hereof, the Notes and the Warrants shall
be free from all taxes, liens and charges with respect to the issue thereof. As of the Closing, a number of shares of Common Stock shall have been duly authorized and reserved for issuance equal to the maximum number of shares issuable upon
conversion of the Notes and exercise of the Warrants to be issued at Closing. Upon conversion, exercise or issuance in accordance with the Notes and the Warrants, the Conversion Shares will be validly issued, fully-paid and nonassessable.

  

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 3.3 Non-Contravention. The execution and delivery of the Transaction Documents and the
consummation of the transactions contemplated hereby and thereby will not (A) conflict with or constitute a violation of, or default (with the passage of time or otherwise) under, (i) any contract, agreement or other instrument filed or
incorporated by reference as an exhibit to any of the Exchange Act Documents (any such contract, agreement or instrument, an “Exchange Act Exhibit”); (ii) the charter, by-laws or other organizational documents of the Company or any
Subsidiary; or (iii) any law, administrative regulation, ordinance or order of any court or governmental agency, arbitration panel or authority applicable to the Company or any Subsidiary or their respective properties, except in the case of
clauses (i) and (iii) for any such conflicts, violations or defaults which are not reasonably likely to have a Material Adverse Effect or (B) result in the creation or imposition of any lien, encumbrance, claim, security interest or
restriction whatsoever upon any of the material properties or assets of the Company or any Subsidiary (except as contemplated hereby) or an acceleration of indebtedness pursuant to any obligation, agreement or condition contained in any Exchange Act
Exhibit. Except for (i) the filing of a Form 8-K in connection with the transactions contemplated by the Transaction Documents, and (ii) the Registration Statement, Form D and any related state “Blue Sky” filings required to be
filed with respect to the Securities pursuant to Section 6 hereof, no consent, approval, authorization or other order of, or registration, qualification or filing with, any regulatory body, administrative agency, or other governmental body in
the United States or any other person is required for the execution and delivery of the Transaction Documents, and the valid issuance and sale of the Securities to be sold pursuant to this Agreement, and the valid issuance of the Conversion Shares
in accordance with the Notes, other than such as have been made or obtained, and except for any post-closing securities filings or notifications required to be made under federal or state securities laws. 
 3.4 Capitalization. The capitalization of the Company as of March 31, 2006 (or the most recently quarterly or annual report filed with the
Commission, if applicable) is as set forth in the most recent applicable Exchange Act Documents, increased as set forth in the next sentence. The outstanding shares of capital stock of the Company have been duly and validly issued and are fully paid
and nonassessable, have been issued in compliance with all federal and state securities laws, and were not issued in violation of any preemptive rights or similar rights to subscribe for or purchase securities. Except as set forth in or contemplated
by the Exchange Act Documents, there are no outstanding rights (including, without limitation, preemptive rights), warrants or options to acquire, or instruments convertible into or exchangeable for, any unissued shares of capital stock or other
equity interest in the Company or any Subsidiary, or any contract, commitment, agreement, understanding or arrangement of any kind to which the Company is a party or of which the Company has knowledge and relating to the issuance or sale of any
capital stock of the Company or any Subsidiary, any such convertible or exchangeable securities or any such rights, warrants or options. No further approval or authorization of any stockholder, the Board of Directors of the Company or others is
required for the issuance and sale of the Securities. The Company owns the entire equity interest in each of its Subsidiaries, free and clear of any pledge, lien, security interest, encumbrance, claim or equitable interest, other than as described
in the Exchange Act Documents. Except as disclosed in the Exchange Act Documents, there are no stockholders agreements, voting agreements or other similar agreements with respect to the Common Stock to which the Company is a party or, to the
knowledge of the Company, between or among any of the Company’s stockholders. 
  

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 3.5 Legal Proceedings. There is no material legal or governmental proceeding pending or, to the
knowledge of the Company, threatened to which the Company or any Subsidiary is or may be a party or of which the business or property of the Company or any Subsidiary is subject that is not disclosed in the Exchange Act Documents, and which
proceeding, individually or in the aggregate, would be reasonably likely to have a Material Adverse Effect. There are no disagreements of any kind presently existing, or reasonably anticipated by the Company to arise between the accountants,
auditors and lawyers formerly or presently employed by the Company. 
 3.6 No Violations. Neither the Company nor any Subsidiary is
(i) in violation of its charter, bylaws, or other organizational document, (ii) in violation of any law, administrative regulation, ordinance or order of any court or governmental agency, arbitration panel or authority applicable to the
Company or any Subsidiary, which violation, individually or in the aggregate, would be reasonably likely to have a Material Adverse Effect, or (iii) in default (and there exists no condition which, with the passage of time or otherwise, would
constitute a default) in any material respect in the performance of any Exchange Act Exhibit, which would be reasonably likely to have a Material Adverse Effect. 
 3.7 Governmental Permits, Etc. Each of the Company and its Subsidiaries has all necessary franchises, licenses, certificates and other authorizations from any foreign, federal, state or local government or
governmental agency, department, or body that are currently necessary for the operation of the business of the Company and its Subsidiaries as currently conducted and as described in the Exchange Act Documents except where the failure to currently
possess could not reasonably be expected to have a Material Adverse Effect. 
 3.8 Intellectual Property. Except as specifically
disclosed in the Exchange Act Documents (i) each of the Company and its Subsidiaries owns or possesses sufficient rights to use all material patents, patent rights, trademarks, copyrights, licenses, inventions, trade secrets, trade names and
know-how (collectively, “Intellectual Property”) described or referred to in the Exchange Act Documents as owned or possessed by it or that are necessary for the conduct of its business as now conducted or as proposed to be conducted as
described in the Exchange Act Documents except where the failure to currently own or possess would not have a Material Adverse Effect, (ii) to the knowledge of the Company, neither the Company nor any of its Subsidiaries is infringing any
rights of a third party with respect to any Intellectual Property that, individual or in the aggregate, would have a Material Adverse Effect, (iii) neither the Company nor any of its Subsidiaries has received any notice of, or has any knowledge
of, any asserted infringement by the Company or any of its Subsidiaries of, any rights of a third party with respect to any Intellectual Property that, individually or in the aggregate, would have a Material Adverse Effect if determined adversely to
the Company and (iv) neither the Company nor any of its Subsidiaries has received any notice of, or has any knowledge of, infringement by a third party with respect to any Intellectual Property rights of the Company or of any Subsidiary that,
individually or in the aggregate, would have a Material Adverse Effect. 
 3.9 Exchange Act Documents; Financial Statements. The
Company has filed all Exchange Act Documents required for the twelve months preceding the Closing Date on a timely basis or has timely filed a valid extension of such time of filing and has filed any such Exchange Act Documents prior to the
expiration of any such extension. As of their respective dates, the 

  

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Exchange Act Documents complied in all material respects with the requirements of the Securities Act and the Exchange Act and the rules and regulations of
the Securities and Exchange Commission promulgated thereunder, and none of the Exchange Act Documents, when filed, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which they were made, not misleading. The financial statements of the Company and the related notes contained in the Exchange Act Documents present fairly, in accordance with
generally accepted accounting principles, the financial position of the Company and its Subsidiaries as of the dates indicated, and the results of its operations and cash flows for the periods therein specified consistent with the books and records
of the Company and its Subsidiaries except that the unaudited interim financial statements were or are subject to normal and recurring year-end adjustments which are not expected to be material in amount. Such financial statements (including the
related notes) have been prepared in accordance with generally accepted accounting principles applied on a consistent basis throughout the periods therein specified, except as may be disclosed in the notes to such financial statements, or in the
case of unaudited statements, as may be permitted by the SEC on Form 10-QSB under the Exchange Act and except as disclosed in the Exchange Act Documents. The other financial information contained in the Exchange Act Documents has been prepared
on a basis consistent with the financial statements of the Company. 
 3.10 No Material Adverse Change. Except as disclosed in the
Exchange Act Documents, since March 31, 2006 or the last quarterly or annual report of the Company, there has not been (i) any event affecting the Company or its Subsidiaries that has had a Material Adverse Effect, (ii) any
obligation, direct or contingent, that is material to the Company and its Subsidiaries considered as one enterprise, incurred by the Company, except obligations incurred in the ordinary course of business, (iii) any dividend or distribution of
any kind declared, paid or made on the capital stock of the Company or any of its Subsidiaries, or (iv) any loss or damage (whether or not insured) to the physical property of the Company or any of its Subsidiaries which has been sustained
which has a Material Adverse Effect; provided, however, that changes in the ordinary course of business, including but not limited to the use of cash and increases in liabilities in the ordinary course of business, shall not be deemed to be a
material adverse change or to have a Material Adverse Effect. 
 3.11 No Manipulation of Stock. The Company has not taken and will
not, in violation of applicable law, take, any action designed to or that might reasonably be expected to cause or result in stabilization or manipulation of the price of the Common Stock to facilitate the sale or resale of the Notes, the Warrants
or the Conversion Shares. 
 3.12 Foreign Corrupt Practices. Neither the Company, nor to the knowledge of the Company, any agent or
other person acting on behalf of the Company, has (i) directly or indirectly, used any corrupt funds for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity, (ii) made
any unlawful payment to foreign or domestic government officials or employees or to any foreign or domestic political parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by any
person acting on its behalf of which the Company is aware) which is in violation of law, or (iv) violated in any material respect any provision of the Foreign Corrupt Practices Act of 1977, as amended. 
  

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 3.13 Taxes. The Company has filed all necessary federal, state and foreign income and franchise
tax returns and has paid or accrued all taxes shown as due thereon, except where failure to so file or to so pay would not have a Material Adverse Effect and the Company has no knowledge of a tax deficiency which has been or might be asserted or
threatened against it which would have a Material Adverse Effect. 
 3.14 Private Offering. Assuming the correctness of the
representations and warranties of the Purchasers set forth in Section 4 hereof, the offer and sale of Notes and the Warrants hereunder is and, in accordance with the terms of the Notes and Warrants, the issuance of the Conversion Shares will be
exempt from registration under the Securities Act. The Company has not distributed and will not distribute prior to the Closing Date any offering material in connection with this Offering and sale of the Securities other than the Transaction
Documents of which this Agreement is a part or the Exchange Act Documents. The Company has not in the past nor will it hereafter take any action to sell, offer for sale or solicit offers to buy any securities of the Company which would bring the
offer, issuance or sale of the Securities as contemplated by this Agreement, or the issuance of the Conversion Shares in accordance with the terms of the Notes, within the provisions of Section 5 of the Securities Act, unless such offer,
issuance or sale was or shall be within the exemptions of Section 4 of the Securities Act. Neither the Company nor any person acting on behalf of the Company has offered or sold any of the Securities by any form of general solicitation
or general advertising. The Company has offered the Securities for sale only to the Purchasers and certain other “accredited investors” within the meaning of Rule 501 under the Securities Act. 
 3.15 Consents and Waivers of Senior Debt. The Company has obtained any and all consents and waivers necessary or appropriate for consummation of
the transactions contemplated by this Agreement, including but not limited to the consent of the Senior Debt holders. 
 4.
Representations, Warranties and Covenants of the Purchasers. 
 4.1 Securities Law Representations and Warranties. Each
Purchaser severally and not jointly represents, warrants and covenants to the Company as follows: 
 (a) The Purchaser is knowledgeable,
sophisticated and experienced in making, and is qualified to make, decisions with respect to investments in securities representing an investment decision like that involved in the purchase of the Securities, including investments in securities
issued by the Company, and has requested, received, reviewed and considered all information it deems relevant in making an informed decision to purchase the Securities. 
 (b) The Purchaser is acquiring the principal amount of Notes set forth in Section 2 above in the ordinary course of its business and for its own account for investment only and has no present intention of
distributing any of the Securities nor any arrangement or understanding with any other persons regarding the distribution of such Securities within the meaning of Section 2(11) of the Securities Act, except as contemplated in Section 6 of
this Agreement; provided, however, that in making such representation, such Purchaser does not agree to hold the Securities for any minimum or specific term and reserves the right to sell, transfer or otherwise dispose of the Securities at any time
in accordance with the provisions of this Agreement and with Federal and state securities laws applicable to such sale, transfer or disposition. 
  

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 (c) The Purchaser will not, directly or indirectly, offer, sell, pledge, transfer or otherwise dispose
of (or solicit any offers to buy, purchase or otherwise acquire or take a pledge of) any of the Securities except in compliance with the Securities Act and the rules and regulations promulgated thereunder (the “Rules and Regulations”).

 (d) The Purchaser has completed or caused to be completed the Investor Questionnaire and the Selling Stockholder Notice and
Questionnaire, attached to this Agreement as Appendices I and II, for use in preparation of the Registration Statement (the “Investor Questionnaire” and the “Selling Stockholder Questionnaire”, respectively), and the answers to
the Questionnaires are true and correct in all material respects as of the date of this Agreement and will be true and correct as of the Closing Date and the effective date of the Registration Statement; provided that the Purchasers shall be
entitled to update such information by providing notice thereof to the Company before the effective date of such Registration Statement. 
 (e) The Purchaser has, in connection with its decision to purchase the principal amount of Notes set forth in Section 2 above, relied solely upon the Exchange Act Documents and the representations and warranties of the Company
contained in this Agreement. 
 (f) The Purchaser believes it has received all information it considers necessary or appropriate for
deciding whether to purchase the Securities. The Purchaser further represents that it has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering of the Securities and the business,
properties, prospects and financial condition of the Company. The foregoing, however, does not limit or modify the representations and warranties of the Company in Section 3 of this Agreement or the right of the Purchasers to rely on such
representations and warranties. 
 (g) As of the date hereof, in the event of the conversion of the Notes, each Purchaser would own that
number of shares of Common Stock noted in Schedule A hereto. 
 (h) The Purchaser is an “accredited investor” within the meaning
of Rule 501 of Regulation D promulgated under the Securities Act. 
 4.2 Resales of Securities. Each Purchaser agrees to the
following: 
 (a) If the Purchaser shall propose to sell any Securities, the Purchaser shall notify the Company of its intent to do so on or
before two (2) business days prior to the date of such sale (the “Notice of Sale”), and the provision of the Notice of Sale to the Company shall conclusively be deemed to establish an agreement by such Purchaser to comply with the
registration provisions herein described. The Notice of Sale shall be deemed to constitute a representation that any information previously supplied by such Purchaser is accurate as of the date of such Notice of Sale. 
 (b) The Notice of Sale in substantially the form attached as Exhibit I to Appendix II shall be given in accordance with the provisions of
Section 4.2(a) hereof. However, the Purchaser may give the Notice of Sale orally by telephoning the current Chief Financial 

  

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Officer at the Company at: (510) 483-9620. An oral Notice of Sale shall be deemed to have been received only at such time as the selling Purchaser
speaks directly with the current Chief Financial Officer. In addition, an oral Notice of Sale shall only be deemed effective if it is followed by a written Notice of Sale received by the Company by personal delivery or facsimile within 24 hours
after giving the oral Notice of Sale. 
 (c) The Company may refuse to permit the Purchaser to resell any Securities for a period of time
not to exceed 30 days; provided, however, that in order to exercise this right, the Company must deliver a certificate in writing to the Purchaser to the effect that the Registration Statement in its then current form contains an untrue statement of
material fact or omits to state a material fact necessary in order to make the statements made therein, in light of the circumstances under which they were made, not misleading. During any suspension period (each a “Suspension”) as
contemplated by this Section 4.2(c), of which there shall be no more than two in any 12-month period, the Company will not allow any of its officers or directors to buy or sell shares of the Company’s securities. 
 4.3 Certain Trading Limitations. Each Purchaser represents and warrants that it has not directly or indirectly, nor has any person or entity
acting on behalf of or pursuant to any understanding with such Purchaser, engaged in any purchases or sales in the securities of the Company (including, without limitations, any short sales involving the Company’s securities) since the date on
which such Purchaser entered into a confidentiality or similar agreement or understanding with the Company in connection with such Purchaser’s participation in the transactions contemplated by this Agreement. 
 4.4 Due Execution, Delivery and Performance. Each Purchaser represents and warrants that: 
 (a) This Agreement has been duly executed and delivered by the Purchaser and constitutes a valid and binding obligation of the Purchaser and the Company,
enforceable against the Purchaser in accordance with its terms. 
 (b) The execution, delivery and performance of the Transaction Documents
and the consummation of the transactions contemplated hereby and thereby and the fulfillment of the terms of the Transaction Documents have been duly authorized by all necessary corporate or LLC action and will not conflict with or constitute a
breach of, or default under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Purchaser pursuant to, any contract, indenture, mortgage, loan agreement, deed, trust, note, lease, sublease,
voting agreement, voting trust or other instrument or agreement to which the Purchaser is a party or by which it may be bound, or to which any of the property or assets of the Purchaser is subject, nor will such action result in any violation of the
provisions of the charter or bylaws, or other organizational documents, of the Purchaser or any applicable statute, law, rule, regulation, ordinance, decision, directive or order applicable to the Purchaser or its property or assets. 
 5. Survival of Representations, Warranties and Agreements. Notwithstanding any investigation made by any party to this Agreement, all
representations and warranties made by the Company and the Purchasers in this Agreement shall survive for one (1) year from the execution of this Agreement. 
  

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 6. Form D Filing; Registration; Compliance with the Securities Act; Covenants. 
 6.1 Form D Filing; Registration of Shares. 
 6.1.1 Registration Statement; Expenses. The Company shall: 
 (a) file as soon as practicable, but in no event later than 15
days after the date of the Closing, a Form D relating to the sale of the Securities under this Agreement, pursuant to Regulation D under the Securities Act. 
 (b) At the earlier of: (i) December 31, 2006 or (ii) 30 days after the mandatory conversion of the Notes pursuant to Section 3(e) of the Notes, prepare and file with the Commission a Registration
Statement on Form S-3 (or, if the Company is ineligible to use Form S-3, then on Form SB-1 or SB-2 or other appropriate form) relating to the sale of the Conversion Shares (and all shares issuable in respect thereof, whether as stock dividends,
pursuant to Section 6.1.2 or otherwise) by the Purchasers from time to time on the OTC Bulletin Board (or the facilities of any national securities exchange on which the Company’s Common Stock is then traded) or in privately negotiated
transactions (the “Registration Statement”); 
 (c) the Company shall use its best efforts to cause such Registration Statement to
become effective, and, keep such Registration Statement effective for a period of up to two years from the Closing Date, or such lesser period of time as all of the Conversion Shares have been sold or can be sold without restriction under Rule 144;

 (d) subject to receipt of necessary information from the Purchasers, use its best efforts to cause the Commission to notify the Company
of the Commission’s willingness to declare the Registration Statement effective on or before 60 days (or 120 days in the event the Registration Statement is reviewed by the Commission) after the initial filing of the Registration Statement (the
“Required Effectiveness Date”); 
 (e) notify Purchasers promptly upon the Registration Statement, or any post-effective amendment
thereto, being declared effective by the Commission; 
 (f) prepare and file with the Commission such amendments and supplements to the
Registration Statement and the Prospectus (as defined in Section 6.3.1 below) and take such other action, if any, as may be necessary to keep the Registration Statement effective until the earlier of (i) the second anniversary of the
Closing Date and (ii) the date on which the Conversion Shares can be sold by non-affiliates of the Company without registration under Rule 144(k) under the Securities Act (such period, the “Effectiveness Period”); 
 (g) promptly furnish to the Purchasers with respect to the Conversion Shares registered under the Registration Statement such reasonable number of
copies of the Prospectus, including any supplements to or amendments of the Prospectus, in order to facilitate the public sale or other disposition of all or any of the Shares by the Purchasers; 
  

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 (h) during the period when copies of the Prospectus are required to be delivered under the Securities
Act or the Exchange Act, file all documents required to be filed with the Commission pursuant to Section 13, 14 or 15 of the Exchange Act within the time periods required by the Exchange Act and the rules and regulations promulgated thereunder;

 (i) file documents required of the Company for customary Blue Sky clearance in all states requiring Blue Sky clearance and use its best
efforts to keep such state registrations effective during the registration period defined herein; provided, however, that the Company shall not be required to qualify to do business or consent to service of process in any jurisdiction
in which it is not now so qualified or has not so consented; and 
 (j) bear all expenses of the Company in connection with the procedures
in paragraphs (a) through (i) of this Section 6.1.1 and the registration of the Conversion Shares pursuant to the Registration Statement. 
 6.1.2 Piggy Back Registration. Prior to the Registration Statement becoming effective, if the Company shall determine to prepare and file with the Commission a registration statement relating to an offering for
its own account or the account of others under the Securities Act of any of its equity securities, then the Company shall send to Purchaser written notice of such determination and if, within five (5) business days after receipt of such notice
Purchaser shall so request in writing, the Company shall include in such registration statement the Securities. If Purchaser decides not to include all of its Securities in any registration statement thereafter filed by the Company, Purchaser shall
nevertheless continue to have the right to include any Securities in any subsequent registration statement or registration statements as may be filed by the Company with respect to offerings of its securities, including the Registration Statement to
be filed pursuant to Section 6.1.1, all upon the terms and conditions set forth herein, to the extent all Securities held by Purchaser have not been covered by a registration statement that has been declared or ordered effective by the time of
such subsequent registration. 
 6.2 Transfer of Conversion Shares After Registration. Each Purchaser agrees that it will not effect
any disposition of the Securities that would constitute a sale within the meaning of the Securities Act, except as contemplated in the Registration Statement referred to in Section 6.1 or as otherwise permitted by, or exempted by, law
(including Rule 144 or any exemption from registration), and that it will promptly notify the Company of any changes in the information set forth in the Registration Statement regarding the Purchaser or its plan of distribution. 
 6.3 Indemnification. For the purpose of this Section 6.3, the term “Registration Statement” shall include any preliminary or final
prospectus, exhibit, supplement or amendment included in or relating to the Registration Statement referred to in Section 6.1. 
 6.3.1
Indemnification by the Company. The Company will indemnify and hold harmless each of the Purchasers and each person, if any, who controls any Purchaser within the meaning of the Securities Act, against any actual and direct losses, claims,
direct damages, liabilities or reasonable expenses, joint or several, to which such Purchasers or such 

  

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controlling person become subject, under the Securities Act, the Exchange Act, or any other federal or state statutory law or regulation, or at common law or
otherwise (including in settlement of any litigation, if such settlement is effected with the written consent of the Company, which consent shall not be unreasonably withheld), insofar as such actual and direct losses, claims, direct damages,
liabilities or reasonable expenses (or actions in respect thereof as contemplated below) (i) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in the Registration Statement, including
the Prospectus, financial statements and schedules, and all other documents filed as a part thereof, as amended at the time of effectiveness of the Registration Statement, including any information deemed to be a part thereof as of the time of
effectiveness pursuant to paragraph (b) of Rule 430A, or pursuant to Rule 434, of the Rules and Regulations, or the prospectus, in the form first filed with the Commission pursuant to Rule 424(b) of the Regulations, or filed as part of the
Registration Statement at the time of effectiveness if no Rule 424(b) filing is required (the “Prospectus”), or any amendment or supplement thereto, or (ii) arise out of or are based upon the omission or alleged omission to state in
any of them a material fact required to be stated therein or necessary to make the statements in any of them, in light of the circumstances under which they were made, not misleading, or (iii) arise out of or are based in whole or in part on
any inaccuracy in the representations and warranties of the Company contained in this Agreement, or any failure of the Company to perform its obligations under this Agreement or under law (the events in clauses (i), (ii), or (iii), collectively are
referred to herein as the “Company Indemnification Events”), and shall reimburse each Purchaser and each such controlling person as the case may be, for the indemnifiable amounts provided for herein on demand as such expenses are incurred;
provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage, liability or expense arises out of or is based upon any Purchaser Indemnification Event (as defined below). 
 6.3.2 Indemnification by the Purchaser. The Purchaser will indemnify and hold harmless the Company, each of its directors, each of its officers
who signed the Registration Statement and each person, if any, who controls the Company within the meaning of the Securities Act, against any actual and direct losses, claims, direct damages, liabilities or reasonable expenses to which the Company,
each of its directors, each of its officers who signed the Registration Statement or controlling person become subject, under the Securities Act, the Exchange Act, or any other federal or state statutory law or regulation, or at common law or
otherwise (including in settlement of any litigation, if such settlement is effected with the written consent of such Purchaser, which consent shall not be unreasonably withheld) insofar as such actual and direct losses, claims, direct damages,
liabilities or reasonable expenses (or actions in respect thereof as contemplated below) arise out of or are based upon (i) the failure of such Purchaser to comply with the covenants and agreements contained in Sections 4.2 or 6.2 of this
Agreement respecting the sale of the Securities or (ii) the inaccuracy of any representation made by such Purchaser in this Agreement or the Questionnaires or (iii) any untrue statement or alleged untrue statement of any material fact
contained in the Registration Statement, the Prospectus, or any amendment or supplement to the Registration Statement or Prospectus, or arise out of or are based upon the omission or alleged omission to state therein a fact required to be stated
therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement,
the Prospectus, or any amendment or supplement thereto, in reliance upon and in conformity with written information furnished to 

  

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the Company by or on behalf of such Purchaser expressly for use therein (the events in clauses (i), (ii), or (iii), collectively are referred to herein as
the “Purchaser Indemnification Events”), and shall reimburse the Company or such officer, director or controlling person, as the case may be, for the indemnifiable amounts provided for herein on demand as such expenses are incurred;
provided, however, that the Purchaser shall not be liable in any such case to the extent that any such loss, claim, damage, liability or expense arises out of or is based upon any Company Indemnification Event. Notwithstanding the foregoing, the
Purchaser’s aggregate obligation to indemnify the Company and such officers, directors and controlling persons shall be limited to the net amount received by the Purchaser from the sale of the Securities. 
 6.3.3 Indemnification Procedure. 
 (a) Promptly after receipt by an indemnified party under this Section 6.3 of notice of the threat or commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against an indemnifying party
under this Section 6.3, promptly notify the indemnifying party in writing of the claim; but the omission to so notify the indemnifying party will not relieve it from any liability which it may have to any indemnified party for contribution or
otherwise under the indemnity agreement contained in this Section 6.3 or to the extent it is not prejudiced as a result of such failure. 
 (b) In case any such action is brought against any indemnified party and such indemnified party seeks or intends to seek indemnity from an indemnifying party, the indemnifying party will be entitled to participate in, and, to the extent
that it may wish, jointly with all other indemnifying parties similarly notified, to assume the defense thereof; provided, however, if the defendants in any such action include both the indemnified party and the indemnifying party and
the indemnified party shall have reasonably concluded that there may be a conflict between the positions of the indemnifying party and the indemnified party in conducting the defense of any such action or that there may be legal defenses available
to it or other indemnified parties that are different from or additional to those available to the indemnifying party, the indemnified party or parties shall have the right to select separate counsel to assume such legal defenses and to otherwise
participate in the defense of such action on behalf of such indemnified party or parties. Upon receipt of notice from the indemnifying party to such indemnified party of its election to so assume the defense of such action, the indemnifying party
will not be liable to such indemnified party under this Section 6.3 for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof unless: 
 (i) the indemnified party shall have employed such counsel in connection with the assumption of legal defenses in accordance with the proviso to the
preceding sentence (it being understood, however, that the indemnifying party shall not be liable for the expenses of more than one separate counsel, approved by such indemnifying party representing all of the indemnified parties who are parties to
such action) or 
 (ii) the indemnifying party shall not have employed Heller Ehrman LLP or other counsel reasonably satisfactory to the
indemnified party to represent the indemnified party within a reasonable time after notice of commencement of action, in each of which cases the reasonable fees and expenses of counsel shall be at the expense of the 

  

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indemnifying party. Notwithstanding the provisions of this Section 6.3, the Purchaser shall not be liable for any indemnification obligation under this
Agreement in excess of the amount of net proceeds received by the Purchaser from the sale of the Securities, unless such obligation has resulted from the gross negligence or willful misconduct of the Purchaser. 
 6.3.4 Contribution. If a claim for indemnification under this Section 6.3 is unavailable to an indemnified party (by reason of public policy
or otherwise), then each indemnifying party, in lieu of indemnifying such indemnified party, shall contribute to the amount paid or payable by such indemnified party as a result of any losses, claims, damages, liabilities or expenses referred to in
this Agreement, in such proportion as is appropriate to reflect the relative fault of the indemnifying party and indemnified party in connection with the actions, statements or omissions that resulted in such losses, claims, damages, liabilities or
expenses as well as any other relevant equitable considerations. The relative fault of such indemnifying party and indemnified party shall be determined by reference to, among other things, whether any action in question, including any untrue or
alleged untrue statement of a material fact or omission or alleged omission of a material fact, has been taken or made by, or relates to information supplied by, such indemnifying party or indemnified party, and the parties’ relative intent,
knowledge, access to information and opportunity to correct or prevent such action, statement or omission. The amount paid or payable by a party as a result of any losses, claims, damages, liabilities or expenses shall be deemed to include, subject
to the limitations set forth in this Section 6.3, any reasonable attorneys’ or other reasonable fees or expenses incurred by such party in connection with any proceeding to the extent such party would have been indemnified for such fees or
expenses if the indemnification provided for in this Section was available to such party in accordance with its terms. 
 The parties hereto
agree that it would not be just and equitable if contribution pursuant to this Section 6.3 were determined by pro rata allocation or by any other method of allocation that does not take into account the equitable considerations referred to in
the immediately preceding paragraph. Notwithstanding the provisions of this Section 6.3, no Purchaser shall be required to contribute, in the aggregate, any amount in excess of the amount by which the proceeds actually received by such
Purchaser from the sale of Securities exceeds the amount of any damages that such Purchaser has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No party to this Agreement guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any other party to this Agreement who was not guilty of such fraudulent misrepresentation. 
 6.4 Termination of Conditions and Obligations. The restrictions imposed by Section 4 or this Section 6 upon the transferability of the
Securities shall cease and terminate as to any particular number of the Securities upon the passage of two years from the Closing Date or at such time as an opinion of counsel satisfactory in form and substance to the Company shall have been
rendered to the effect that such conditions are not necessary in order to comply with the Securities Act. 
 6.5 Rule 144 Information.
For two years after the date of this Agreement, the Company shall use its best efforts to file all reports required to be filed by it under the Securities Act, the Rules and Regulations and the Exchange Act and shall take such further action to the
extent required to enable the Purchasers to sell the Securities pursuant to Rule 144 under the Securities Act (as such rule may be amended from time to time). 
  

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 6.6 Legend Removal. The Company shall, and shall use its best efforts to cause its transfer agent
to, promptly process requests for transfer or de-legending of Securities or certificates representing Conversion Shares in compliance with this Agreement. 
 7. Notices. All notices, requests, consents and other communications under this Agreement shall be in writing, shall be mailed by first-class registered or certified airmail, confirmed facsimile or nationally
recognized overnight express courier postage prepaid, and shall be delivered as addressed as follows: 
 (a) if to the Company, to:

 Alpha Innotech Corp. 2401 Merced Street 
 San Leandro, CA 94577 
 Fax: (510)
 Attn: Chief Financial Officer 
 with a copy
to: 
 Heller Ehrman LLP 
 275
Middlefield Road 
 Menlo Park, CA 94025-3056 
 Fax: (650) 324-0638 
 Attn: Marina Remennik, Esq. 
 or to such other person at such other place as the Company shall designate to the Purchaser in writing; and 
 (b) if to a Purchaser, at its address as set forth on Schedule A to this Agreement, or at such other address or addresses as may have been furnished to
the Company in writing. 
 Such notice shall be deemed effectively given upon confirmation of receipt by facsimile, or two business days
after deposit with such overnight courier. 
 8. Modification; Amendment. This Agreement may not be modified or amended except
pursuant to an instrument in writing signed by the Company and Purchasers holding at least a majority of the Securities issued and sold pursuant to this Agreement (excluding Securities that have been resold to the public or otherwise transferred by
the Purchasers). 
 9. Headings. The headings of the various sections of this Agreement have been inserted for convenience of
reference only and shall not be deemed to be part of this Agreement. 
 10. Severability. If any provision contained in this Agreement
should be held to be invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained in this Agreement shall not in any way be affected or impaired thereby. 
  

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 11. Governing Law. This Agreement shall be governed by and construed in accordance with the laws
of the State of California, without reference to conflict of laws, and the federal law of the United States of America. 
 12.
Counterparts. This Agreement may be executed in two or more counterparts, each of which shall constitute an original (whether an actual original or a facsimile), but all of which, when taken together, shall constitute but one instrument, and
shall become effective when one or more counterparts have been signed by each party to this Agreement and delivered to the other parties. 
 13. 8-K Filing and Publicity. Following the Closing Date, the Company shall file a Current Report on Form 8-K with the SEC describing the terms of the transactions contemplated by this Agreement and attaching this Agreement and the
press release referred to below as exhibits to such filing (the “8-K Filing”). Neither the Company nor any Purchaser shall issue any press releases or any other public statements with respect to the transactions contemplated by this
Agreement; provided, however, that the Company shall be entitled, without the prior approval of any Purchaser, to make any press release or other public disclosure with respect to such transactions (i) in substantial conformity with the 8-K
Filing and contemporaneously therewith and (ii) as required by applicable law. 
 14. Stock Splits, Dividends and other Similar
Events. The provisions of this Agreement shall be appropriately adjusted to reflect any stock split, stock dividend, reorganization or other similar event that may occur with respect to the Company after the date hereof. 
 [Signature pages follow] 
  

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 IN WITNESS WHEREOF, the parties to
this Agreement have caused this Agreement to be executed by their duly authorized representatives as of the day and year first above written. 
  

			
	ALPHA INNOTECH CORP.
		
	By:	 	  

	Name:	 	Haseeb Chaudhry
	Its:	 	Chief Executive Officer

 IN WITNESS WHEREOF, the parties to
this Agreement have caused this Agreement to be executed by their duly authorized representatives as of the day and year first above written. 
  

			
	[PURCHASER]
		
	By:	 	  

	Name:	 	  

	Its:	 	Authorized Signatory

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