**Exhibit 4.13**

**REGISTRATION RIGHTS AGREEMENT**

THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is made as of            2015, among the undersigned corporation (the “Company”), and each signatory hereto (each, an “Investor” and collectively, the“Investors”). Capitalized terms not otherwise defined herein shall have the meaning ascribed to them in the Subscription Agreement (as defined below). 

**R E C I T A L S**

WHEREAS,the Company each Investor are parties to a Subscription Agreements (collectively, the “Subscription Agreements”), dated as of the date hereof, as such may be amended and supplemented from time to time; 

WHEREAS, the Investors’ obligations under the Subscription Agreements are conditioned upon certain registration rights under theSecurities Act of 1933, as amended (the “Securities Act”); and 

WHEREAS, the Investors and the Company desire to providefor the rights of registration under the Securities Act as are provided herein upon the execution and delivery of this Agreement by such Investors and the Company. 

NOW, THEREFORE, in consideration of the promises, covenants and conditions set forth herein, the parties hereto hereby agree as follows: 

1. Registration Rights. 

1.1Definitions. As used in this Agreement, the following terms shall have the meanings set forth below: 

(a)“Commission” means the United States Securities and Exchange Commission. 

(b) “Common Stock” means theCompany’s common stock, par value $0.01 per share. 

(c) “Effectiveness Date” means the date that is one hundred andtwenty (120) days after the Filing Date. 

(d) “Exchange Act” means the Securities Exchange Act of 1934, as amended.

(e) “Filing Date” means the date that is sixty (60) days after the Trigger Date. 

(f) “Investor” means any person owning Registrable Securities who becomes party to this Agreement by executing a counterpartsignature page hereto, or other agreement in writing to be bound by the terms hereof, which is accepted by the Company. 

(g) The terms “register,” “registered” and“registration” refer to a registration effected by preparing and filing a registration statement or similar document in compliance with the Securities Act, and the declaration or ordering of effectiveness of such registrationstatement or document. 

(h) “Registrable Securities” 25% of the maximum number of shares of (i) Common Stock issuedpursuant to the Subscription Agreement underlying the Units and (ii) Conversion Shares issuable upon conversion of the Series E Preferred Stock as of the Trading Day (as defined in the Series E Certificate of Designation) immediately precedingthe applicable date of determination (without taking into account any limitations on the conversion of the Series E Preferred Stock); provided, however, that Registrable Securities shall not include any securities of the Company thathave previously been registered and remain subject to a currently effective registration statement or which have been sold to the public either pursuant to a registration statement or Rule 144, or which have been sold in a private transaction inwhich the transferor’s rights under this Section 1 are not assigned, or which may be sold immediately without registration under the Securities Act and without restriction or imitation pursuant to Rule 144 and without the requirement to bein compliance with Rule 144(c)(1). 

(i) “Rule 144” means Rule 144 as promulgated by the Commission under the SecuritiesAct, as such Rule may be amended from time to time, or any similar successor rule that may be promulgated by the Commission. 

(j)“Rule 415” means Rule 415 as promulgated by the Commission under the Securities Act, as such Rule may be amended from time to time, or any similar successor rule that may be promulgated by the Commission. 

(k) “Series E Preferred Stock” means the Company’s Series E Convertible Preferred Stock, $0.01 par value per share,issuable pursuant to the Subscription Agreement. 

(l) “Shares” means (i) the shares of Common Stock issued as partof the Units pursuant to the Subscription Agreement and (ii) the Conversion Shares issuable upon conversion of the Series E Preferred Stock. 

(m) “Trigger Date” means the Final Closing Date. 

1.2 Company Registration. 

(a) On or prior to the Filing Date, the Company shall prepare and file with the Commission a registration statement covering the RegistrableSecurities for an offering to be made on a continuous basis pursuant to Rule 415. The registration statement shall be on Form S-1 or, if the Company is so eligible, on Form S-3 (except if the Company is not then eligible to register for resale theRegistrable Securities on Form S-1 or Form S-3, as the case may be, in which case such registration shall be on another appropriate form in accordance herewith) and shall contain (unless otherwise directed by Investors holding an aggregate of atleast 60% of the Registrable Securities on an “as converted” and “as exercised” basis including the approval of the Lead Investor) substantially the “Plan of Distribution” attached hereto as Annex A. TheCompany shall cause the registration statement to become effective and remain effective as provided herein. The Company shall use its reasonable best efforts to cause the registration 

statement to be declared effective under the Securities Act as soon as possible and, in any event, by the Effectiveness Date. The Company shall use its reasonable best efforts to keep theregistration statement continuously effective under the Securities Act until all Registrable Securities covered by such registration statement have been sold, or may be sold without the requirement to be in compliance with Rule 144(c)(1) andotherwise without restriction or limitation pursuant to Rule 144, as determined by the counsel to the Company (the “Effectiveness Period”). 

(b) The Company shall pay to Investors a fee of 1% per month of the Investors’ investment, payable in cash, for every thirty(30) day period up to a maximum of 12%, (i) following the Filing Date that the registration statement has not been filed and (ii) following the Effectiveness Date that the registration statement has not been declared effective;provided, however, that the Company shall not be obligated to pay any such liquidated damages if (i) the Registrable Securities that would other be covered by the registration statement may be sold without the requirement to be incompliance with Rule 144(c)(1) and otherwise without restriction or limitation pursuant to Rule 144 under the Securities Act or (ii) the Company is unable to fulfill its registration obligations as a result of rules, regulations, positions orreleases issued or actions taken by the Commission pursuant to its authority with respect to “Rule 415”, and the Company registers at such time the maximum number of shares of Common Stock permissible upon consultation with the staff ofthe Commission. 

(c) If during the Effectiveness Period, the number of Registrable Securities at any time exceeds 100% of the number ofshares of Common Stock then registered in a registration statement, the Company shall file as soon as reasonably practicable after receiving written notice from holders of a majority of the Registrable Securities not registered an additionalregistration statement covering the resale of not less than the number of such Registrable Securities. 

(d) The Company shall bear and payall expenses reasonably incurred in connection with any registration, filing or qualification of Registrable Securities with respect to the registrations pursuant to this Section 1.2 for each Investor, including (without limitation) allregistration, filing and qualification fees, printer’s fees, accounting fees and fees and disbursements of counsel for the Company, but excluding any brokerage or underwriting fees, discounts and commissions relating to Registrable Securitiesand fees and disbursements of counsel for the Investors. 

(e) If at any time during the Effectiveness Period there is not an effectiveRegistration Statement covering all of the Registrable Securities, then the Company shall notify each Investor in writing at least fifteen (15) days prior to the filing of any registration statement under the Securities Act, in connection witha public offering of shares of Common Stock (including, but not limited to, registration statements relating to secondary offerings of securities of the Company but excluding any registration statements (i) on Form S-4 or S-8 (or any successoror substantially similar form), or of any employee stock option, stock purchase or compensation plan or of securities issued or issuable pursuant to any such plan, or a dividend reinvestment plan, (ii) otherwise relating to any employee,benefit plan or corporate reorganization or other transactions covered by Rule 145 promulgated under the Securities Act, (iii) on any registration form which does not permit secondary sales or does not include

substantially the same information as would be required to be included in a registration statement covering the resale of the Registrable Securities. In the event an Investor desires to includein any such registration statement all or any part of the Registrable Securities held by such Investor, the Investor shall within ten (10) days after the above-described notice from the Company, so notify the Company in writing, including thenumber of such Registrable Securities such Investor wishes to include in such registration statement. If an Investor decides not to include all of its Registrable Securities in any registration statement thereafter filed by the Company such Investorshall nevertheless continue to have the right to include any Registrable Securities in any subsequent registration statement or registration statements as may be filed by the Company with respect to the offering of the securities, all upon the termsand conditions set forth herein. 

1.3 Obligations of the Company. Whenever required under this Section 1 to effect theregistration of any Registrable Securities, the Company shall, as expeditiously as reasonably possible: 

(a) Prepare and file with theCommission a registration statement with respect to such Registrable Securities and use its reasonable best efforts to cause such registration statement to become effective and to keep such registration statement effective during the EffectivenessPeriod; 

(b) Prepare and file with the Commission such amendments and supplements to such registration statement and the prospectus usedin connection with such registration statement as may be necessary to comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such registration statement; 

(c) Furnish to the Investors such numbers of copies of a prospectus, including a preliminary prospectus, in conformity with the requirementsof the Securities Act, and such other documents as they may reasonably request in order to facilitate the disposition of Registrable Securities owned by them (provided that the Company would not be required to print such prospectuses if readilyavailable to Investors from any electronic service, such as on the EDGAR filing database maintained at www.sec.gov); 

(d) Use itsreasonable best efforts to register and qualify the securities covered by such registration statement under such other securities’ or blue sky laws of such jurisdictions as shall be reasonably requested by the Investors; provided that theCompany shall not be required in connection therewith or as a condition thereto to qualify to do business or to file a general consent to service of process in any such states or jurisdictions; 

(e) In the event of any underwritten public offering, enter into and perform its obligations under an underwriting agreement, in usual andcustomary form, with the managing underwriter(s) of such offering (each Investor participating in such underwriting shall also enter into and perform its obligations under such an agreement); 

(f) Promptly notify each Investor holding Registrable Securities covered by such registration statement at any time when a prospectus relatingthereto is required to be delivered under the Securities Act, within one business day, (i) of the effectiveness of such registration statement, or (ii) of the happening of any event as a result of which the prospectus

included in such registration statement, as then in effect, includes an untrue statement of a material fact or omits to state a material fact required to be stated therein or necessary to makethe statements therein not misleading in the light of the circumstances then existing; 

(g) Cause all such Registrable Securitiesregistered pursuant hereto to be listed on each securities exchange or nationally recognized quotation system on which similar securities issued by the Company are then listed; and 

(h) Provide a transfer agent and registrar for all Registrable Securities registered pursuant hereunder and a CUSIP number for all suchRegistrable Securities, in each case not later than the effective date of such registration. 

1.4 Furnish Information. It shall bea condition precedent to the Company’s obligations to take any action pursuant to this Section 1 with respect to the Registrable Securities of any selling Investor that such Investor shall furnish to the Company such information regardingsuch Investor, the Registrable Securities held by such Investor, and the intended method of disposition of such securities in the form attached to this Agreement as Annex B, or as otherwise reasonably required by the Company or the managingunderwriters, if any, to effect the registration of such Investor’s Registrable Securities. 

1.5 Delay of Registration. NoInvestor shall have any right to obtain or seek an injunction restraining or otherwise delaying any such registration as the result of any controversy that might arise with respect to the interpretation or implementation of this Section 1. 

1.6 Indemnification. 

(a) To the extent permitted by law, the Company will indemnify and hold harmless each Investor, any underwriter (as defined in the SecuritiesAct) for such Investor and each person, if any, who controls such Investor or underwriter within the meaning of the Securities Act or the Exchange Act, against any losses, claims, damages or liabilities (joint or several) to which any of theforegoing persons may become subject under the Securities Act, the Exchange Act or other federal or state securities law, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any ofthe following statements, omissions or violations (collectively, a “Violation”): (i) any untrue statement or alleged untrue statement of a material fact contained in a registration statement, including any preliminaryprospectus or final prospectus contained therein or any amendments or supplements thereto (collectively, the “Filings”), (ii) the omission or alleged omission to state in the Filings a material fact required to be statedtherein, or necessary to make the statements therein not misleading, or (iii) any violation or alleged violation by the Company of the Securities Act, the Exchange Act, any state securities law or any rule or regulation promulgated under theSecurities Act, the Exchange Act or any state securities law; and the Company will pay any legal or other expenses reasonably incurred by any person to be indemnified pursuant to this Section 1.6(a) in connection with investigating or defendingany such loss, claim, damage, liability or action; provided, however, that the indemnity agreement contained in this Section 1.6(a) shall not apply to amounts paid in settlement of any such loss, claim, damage, liability or actionif such settlement is effected without the consent of the Company (which consent shall not be unreasonably withheld), nor shall the Company be liable in any such case for any such loss, 

claim, damage, liability or action to the extent that it arises out of or is based upon a Violation that occurs in reliance upon and in conformity with written information furnished expressly foruse in connection with such registration by any such Investor, underwriter or controlling person. 

(b) To the extent permitted by law,each Investor will indemnify and hold harmless the Company, each of its directors, each of its officers who has signed the registration statement, each person, if any, who controls the Company within the meaning of the Securities Act or the ExchangeAct, any underwriter, any other Investor selling securities in such registration statement and any controlling person of any such underwriter or other Investor, against any losses, claims, damages or liabilities (joint or several) to which any ofthe foregoing persons may become subject under the Securities Act, the Exchange Act or other federal or state securities law, insofar as such losses, claims, damages or liabilities (or actions in respect thereto) arise out of or are based upon anyViolation, in each case to the extent (and only to the extent) that such Violation occurs in reliance upon and in conformity with written information furnished by such Investor expressly for use in connection with such registration; and each suchInvestor will pay any legal or other expenses reasonably incurred by any person to be indemnified pursuant to this Section 1.6(b) in connection with investigating or defending any such loss, claim, damage, liability or action; provided,however, that the indemnity agreement contained in this Section 1.6(b) shall not apply to amounts paid in settlement of any such loss, claim, damage, liability or action if such settlement is effected without the consent of the Investor(which consent shall not be unreasonably withheld); provided, however, in no event shall any indemnity under this subsection 1.6(b) exceed the net proceeds received by such Investor upon the sale of the Registrable Securities givingrise to such indemnification obligation. 

(c) Promptly after receipt by an indemnified party under this Section 1.6 of notice of thecommencement of any action (including any governmental action), such indemnified party will, if a claim in respect thereof is to be made against any indemnifying party under this Section 1.6, deliver to the indemnifying party a written noticeof the commencement thereof and the indemnifying party shall have the right to participate in, and, to the extent the indemnifying party so desires, jointly with any other indemnifying party similarly noticed, to assume the defense thereof withcounsel mutually satisfactory to the parties; provided, however, that an indemnified party (together with all other indemnified parties that may be represented without conflict by one counsel) shall have the right to retain oneseparate counsel, with the fees and expenses to be paid by the indemnifying party, if representation of such indemnified party by the counsel retained by the indemnifying party would be inappropriate due to actual or potential differing interestsbetween such indemnified party and any other party represented by such counsel in such proceeding. The failure to deliver written notice to the indemnifying party within a reasonable time of the commencement of any such action, if materiallyprejudicial to its ability to defend such action, shall relieve such indemnifying party of any liability to the indemnified party under this Section 1.6, but the omission so to deliver written notice to the indemnifying party will not relieveit of any liability that it may have to any indemnified party otherwise than under this Section 1.6. 

(d) If the indemnificationprovided for in Sections 1.6(a) and (b) is held by a court of competent jurisdiction to be unavailable to an indemnified party with respect to any loss, claim, damage or expense referred to herein, then the indemnifying party, in lieu ofindemnifying such indemnified party hereunder, shall contribute to the amount paid or payable by such 

indemnified party as a result of such loss, claim, damage or expense in such proportion as is appropriate to reflect the relative fault of the indemnifying party on the one hand and of theindemnified party on the other in connection with the statements or omissions or alleged statements or omissions that resulted in such loss, liability, claim or expense as well as any other relevant equitable considerations. The relative fault ofthe indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact relates to information supplied by the indemnifying party or by theindemnified party and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. In no event shall any Investor be required to contribute an amount in excess of the netproceeds received by such Investor upon the sale of the Registrable Securities giving rise to such indemnification obligation. 

(e) Theobligations of the Company and Investors under this Section 1.6 shall survive the completion of any offering of Registrable Securities in a registration statement under this Section 1, and otherwise. 

1.7 Reports Under Securities Exchange Act. With a view to making available the benefits of certain rules and regulations of theCommission, including Rule 144, that may at any time permit an Investor to sell securities of the Company to the public without registration or pursuant to a registration on Form S-1 or Form S-3, the Company agrees to: 

(a) make and keep public information available, as those terms are understood and defined in Rule 144, at all times after the Final ClosingDate; 

(b) take such action, including the voluntary registration of its Common Stock under Section 12 of the Exchange Act, as isnecessary to enable the Investors to utilize Form S-1 for the sale of their Registrable Securities, such action to be taken as soon as practicable after the end of the fiscal year in which the registration statement is declared effective; 

(c) file with the Commission in a timely manner all reports and other documents required of the Company under the Securities Act and theExchange Act; and 

(d) furnish to any Investor, so long as the Investor owns any Registrable Securities, forthwith upon request (i) awritten statement by the Company that it has complied with the reporting requirements of Rule 144 the Securities Act and the Exchange Act (at any time after it has become subject to such reporting requirements), or that it qualifies as a registrantwhose securities may be resold pursuant to Form S-1 or Form S-3 (at any time after it so qualifies), (ii) a copy of the most recent annual or quarterly report of the Company and such other reports and documents so filed by the Company, and(iii) such other information as may be reasonably requested in availing any Investor of any rule or regulation of the Commission that permits the selling of any such securities without registration or pursuant to such form. 

1.8 Transfer or Assignment of Registration Rights. The rights to cause the Company to register Registrable Securities pursuant to thisSection 1 may be transferred or assigned, but only with all related obligations, by an Investor to a transferee or assignee who (a) acquires at least 25,000 Shares or 25,000 Conversion Shares (on an “as-converted” basis) (subjectto 

appropriate adjustment for stock splits, stock dividends and combinations) from such transferring Investor, unless waived in writing by the Company, or (b) holds Registrable Securitiesimmediately prior to such transfer or assignment; provided, that in the case of (a), (i) prior to such transfer or assignment, the Company is furnished with written notice stating the name and address of such transferee or assignee andidentifying the securities with respect to which such registration rights are being transferred or assigned, (ii) such transferee or assignee agrees in writing to be bound by and subject to the terms and conditions of this Agreement and(iii) such transfer or assignment shall be effective only if immediately following such transfer or assignment the further disposition of such securities by the transferee or assignee is restricted under the Securities Act. 

2. Legend. 

(a) Each certificaterepresenting Shares held by the Investors shall be endorsed with the following legend: 

“THE SECURITIES REPRESENTED BY THISCERTIFICATE 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 THESECURITIES 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. THE SECURITIES ISSUABLE UPONEXERCISE OF THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES.” 

(b) The legend set forth above shall be removed, and the Company shall issue a certificate without such legend to the transferee of the Sharesrepresented thereby, if, unless otherwise required by state securities laws, (i) such Shares have been sold under an effective registration statement under the Securities Act, (ii) in connection with a sale, assignment or other transfer,such holder provides the Company with an opinion of counsel, reasonably acceptable to the Company, to the effect that such sale, assignment or transfer is being made pursuant to an exemption from the registration requirements of the Securities Act,or (iii) such holder provides the Company with reasonable assurance that the Shares are being sold, assigned or transferred pursuant to Rule 144 or Rule 144A under the Securities Act. 

3. Miscellaneous. 

3.1 Governing Law. The parties hereby agree that any dispute which may arise between them arising out of or in connection with thisAgreement shall be adjudicated only before a federal court located in the State of New York and they hereby submit to the exclusive jurisdiction of the federal and state courts of the State of New York with respect to any action or legal proceedingcommenced by any party, and irrevocably waive any objection they now or hereafter may have respecting the venue of any such action or proceeding brought in such a court or respecting the fact that such court is an inconvenient forum, relating to orarising out of this Agreement or any acts or omissions relating to the registration of the securities hereunder, and consent to the service of process in any such action or legal proceeding by means of registered or certified mail, return receiptrequested, in care of the address set forth below or such other address as the undersigned shall furnish in writing to the other. 

****3.2 **WAIVER OF JURY TRIAL. IN ANY ACTION, SUIT, OR PROCEEDING IN ANY JURISDICTION BROUGHT BY ANY PARTY AGAINST ANY OTHER PARTY, THEPARTIES EACH KNOWINGLY AND INTENTIONALLY, TO THE GREATEST EXTENT PERMITTED BY APPLICABLE LAW, HEREBY ABSOLUTELY, UNCONDITIONALLY, IRREVOCABLY AND EXPRESSLY WAIVES FOREVER TRIAL BY JURY**

3.3 Waivers and Amendments. This Agreement may be terminated and any term of this Agreement may be amended or waived (either generallyor in a particular instance and either retroactively or prospectively) with the written consent of the Company and Investors holding at least a 60% of the Registrable Securities then outstanding, including the Lead Investor (the “MajorityInvestors”). Notwithstanding the foregoing, additional parties may be added as Investors under this Agreement, and the definition of Registrable Securities expanded, with the written consent of the Company and the Majority Investors. Nosuch amendment or waiver shall reduce the aforesaid percentage of the Registrable Securities, the holders of which are required to consent to any termination, amendment or waiver without the consent of the record holders of all of the RegistrableSecurities. Any termination, amendment or waiver effected in accordance with this Section 3.3 shall be binding upon each holder of Registrable Securities then outstanding, each future holder of all such Registrable Securities and the Company.

3.4 Successors and Assigns. Except as otherwise expressly provided herein, the provisions of this Agreement shall inure to thebenefit of, and be binding upon, the successors, assigns, heirs, executors and administrators of the parties hereto. 

3.5 EntireAgreement. This Agreement constitutes the full and entire understanding and agreement among the parties with regard to the subject matter hereof, and no party shall be liable or bound to any other party in any manner by any warranties,representations or covenants except as specifically set forth herein. 

3.6 Notices. All notices and other communications requiredor permitted under this Agreement shall be in writing and shall be delivered personally by hand or by overnight courier, mailed by United States first-class mail, postage prepaid, sent by facsimile or sent by electronic mail directed (a) if toan Investor, at such Investor’s address, facsimile number or electronic mail 

address set forth in the Company’s records, or at such other address, facsimile number or electronic mail address as such Investor may designate by ten (10) days’ advance writtennotice to the other parties hereto or (b) if to the Company, to its address, facsimile number or electronic mail address set forth on its signature page to this Agreement and directed to the attention of its President, or at such other address,facsimile number or electronic mail address as the Company may designate by ten (10) days’ advance written notice to the other parties hereto. All such notices and other communications shall be effective or deemed given upon delivery, onthe date that is three (3) days following the date of mailing, upon confirmation of facsimile transfer or upon confirmation of electronic mail delivery. 

3.7 Interpretation. The words “include,” “includes” and “including” when used herein shall be deemed ineach case to be followed by the words “without limitation.” The titles and subtitles used in this Agreement are used for convenience only and are not considered in construing or interpreting this Agreement. 

3.8 Severability. If one or more provisions of this Agreement are held to be unenforceable under applicable law, such provision shallbe excluded from this Agreement, and the balance of the Agreement shall be interpreted as if such provision were so excluded, and shall be enforceable in accordance with its terms. 

3.9 Independent Nature of Investors’ Obligations and Rights. The obligations of each Investor hereunder are several and not jointwith the obligations of any other Investor hereunder, and no Investor shall be responsible in any way for the performance of the obligations of any other Investor hereunder. Nothing contained herein or in any other agreement or document delivered atany closing, and no action taken by any Investor pursuant hereto or thereto, shall be deemed to constitute the Investors as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Investors are inany way acting in concert with respect to such obligations or the transactions contemplated by this Agreement. Each Investor shall be entitled to protect and enforce its rights, including without limitation the rights arising out of this Agreement,and it shall not be necessary for any other Investor to be joined as an additional party in any proceeding for such purpose. 

3.10Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be an original, but all of which together shall constitute one instrument. 

3.11 Telecopy Execution and Delivery. A facsimile, telecopy or other reproduction of this Agreement may be executed by one or moreparties hereto, and an executed copy of this Agreement may be delivered by one or more parties hereto by facsimile or similar electronic transmission device pursuant to which the signature of or on behalf of such party can be seen, and suchexecution and delivery shall be considered valid, binding and effective for all purposes. At the request of any party hereto, all parties hereto agree to execute an original of this Agreement as well as any facsimile, telecopy or other reproductionhereof. 

**[SIGNATURE PAGE FOLLOWS]**

IN WITNESS WHEREOF, the Company has caused this Agreement to be executed by its duly authorizedofficer, as of the date, month and year first set forth above. 

 
MABVAX THERAPEUTICS HOLDINGS, INC.By:
 
Name:Title:Address for notice:
**[COMPANY SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT]**

IN WITNESS WHEREOF, the undersigned Investor has executed this Agreement as of the date, monthand year that such Investor became the owner of Registrable Securities. 

 
“Investor”
 
By:
 
NameTitle:Address:
 

 

 
Telephone:
 
Facsimile:
 
Email:
 

**[INVESTOR COUNTERPART SIGNATURE PAGE TO**

**REGISTRATION RIGHTS AGREEMENT]**

**Annex A**

Plan of Distribution 

Each selling stockholder of the common stock and any of their pledgees, assignees and successors-in-interest may, from time to time, sell anyor all of their shares of common stock on The OTCQB or any other stock exchange, market or trading facility on which the shares are traded or in private transactions. These sales may be at fixed or negotiated prices. A selling stockholder may useany one or more of the following methods when selling shares: 

 
 • ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers; 
 
 • block trades in which the broker-dealer will attempt to sell the shares as agent but may position and resell a portion of the block as principal to facilitate the transaction; 
 
 • purchases by a broker-dealer as principal and resale by the broker-dealer for its account; 
 
 • an exchange distribution in accordance with the rules of the applicable exchange; 
 
 • privately negotiated transactions; 
 
 • settlement of short sales entered into after the effective date of the registration statement of which this prospectus is a part; 
 
 • broker-dealers may agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share; 
 
 • through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise; 
 
 • a combination of any such methods of sale; or 
 
 • any other method permitted pursuant to applicable law. 
The selling stockholders may also sellshares under Rule 144 under the Securities Act of 1933, as amended, if available, rather than under this prospectus. 

Broker-dealersengaged by the selling stockholders may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholders (or, if any broker-dealer acts as agent for the purchaser of shares,from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA Rule 2440; and in the caseof a principal transaction a markup or markdown in compliance with FINRA IM-2440. 

In connection with the sale of the common stock or interests therein, the selling stockholdersmay enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling stockholders may also sell shares ofthe common stock short and deliver these securities to close out their short positions, or loan or pledge the common stock to broker-dealers that in turn may sell these securities. The selling stockholders may also enter into option or othertransactions with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which sharessuch broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). 

The selling stockholders and any broker-dealers or agents that are involved in selling the shares may be deemed to be “underwriters”within the meaning of the Securities Act of 1933, as amended, in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the shares purchased by them may be deemed to beunderwriting commissions or discounts under the Securities Act of 1933, as amended. Each selling stockholder has informed us that it does not have any written or oral agreement or understanding, directly or indirectly, with any person to distributethe common stock. 

We are required to pay certain fees and expenses incurred by us incident to the registration of the shares. We haveagreed to indemnify the selling stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act of 1933, as amended. 

Because selling stockholders may be deemed to be “underwriters” within the meaning of the Securities Act of 1933, as amended, theywill be subject to the prospectus delivery requirements of the Securities Act of 1933, as amended, including Rule 172 thereunder. In addition, any securities covered by this prospectus which qualify for sale pursuant to Rule 144 under the SecuritiesAct of 1933, as amended may be sold under Rule 144 rather than under this prospectus. There is no underwriter or coordinating broker acting in connection with the proposed sale of the resale shares by the selling stockholders. 

We agreed to keep this prospectus effective until the earlier of (i) the date on which the shares may be resold by the sellingstockholders without registration and without the requirement to be in compliance with Rule 144(c)(1) and otherwise without restriction or limitation pursuant to Rule 144 or (ii) all of the shares have been sold pursuant to this prospectus orRule 144 under the Securities Act or any other rule of similar effect. The resale shares will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, theresale shares may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with. 

Under applicable rules and regulations under the Securities Exchange Act of 1934, as amended, any person engaged in the distribution of theresale shares may not simultaneously engage in market making activities with respect to the common stock for the applicable restricted 

period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling stockholders will be subject to applicable provisions of the Securities Exchange Act of1934, as amended, and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of shares of the common stock by the selling stockholders or any other person. We will make copies of thisprospectus available to the selling stockholders and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act of 1933,as amended). 

**Annex B**

**Selling Securityholder Notice and Questionnaire**

The undersigned beneficial owner of common stock (the “Registrable Securities”) of MabVax Therapeutics Holdings, Inc., a Delaware corporation(the “Company”), understands that the Company has filed or intends to file with the Securities and Exchange Commission (the “Commission”) a registration statement (the “Registration Statement”) forthe registration and resale under Rule 415 of the Securities Act of 1933, as amended (the “Securities Act”), of the Registrable Securities, in accordance with the terms of the Registration Rights Agreement (the “RegistrationRights Agreement”) to which this document is annexed. A copy of the Registration Rights Agreement is available from the Company upon request at the address set forth below. All capitalized terms not otherwise defined herein shall have themeanings ascribed thereto in the Registration Rights Agreement. 

Certain legal consequences arise from being named as a selling securityholder in theRegistration Statement and the related prospectus. Accordingly, holders and beneficial owners of Registrable Securities are advised to consult their own securities law counsel regarding the consequences of being named or not being named as a sellingsecurityholder in the Registration Statement and the related prospectus. 

**NOTICE**

The undersigned beneficial owner (the “Selling Securityholder”) of Registrable Securities hereby elects to include the Registrable Securitiesowned by it in the Registration Statement. 

The undersigned hereby provides the following information to the Company and represents and warrants that suchinformation is accurate: 

**QUESTIONNAIRE**

**1. Name.**

(a) Full Legal Name of Selling Securityholder

 

 

(b) Full Legal Name of Registered Holder (if not the same as (a) above) through which Registrable Securities are held: 

 

 

(c) Full Legal Name of Natural Control Person (which means a natural person who directly or indirectly alone or with others has power to vote or dispose ofthe securities covered by this Questionnaire): 

**2. Address for Notices to Selling Securityholder:**

 

 

 

 

 

 

 
Telephone:Fax:Contact Person:
**3. Broker-Dealer Status:**

(a) Are you a broker-dealer? 

Yes                No 

(b) If “yes” to Section 3(a), did youreceive your Registrable Securities as compensation for investment banking services to the Company? 

Yes                No 

Note: If “no” to Section 3(b), theCommission’s staff has indicated that you should be identified as an underwriter in the Registration Statement. 

(c) Are you an affiliate of abroker-dealer? 

Yes                 No 

(d) If you are an affiliate of a broker-dealer, do you certify that you purchased the Registrable Securities in the ordinary course of business, and at thetime of the purchase of the Registrable Securities to be resold, you had no agreements or understandings, directly or indirectly, with any person to distribute the Registrable Securities? 

Yes                 No 

Note: If “no” to Section 3(d), the Commission’s staff has indicated that you should be identified as an underwriter in the RegistrationStatement. 

**4. Beneficial Ownership of Securities of the Company Owned by the Selling Securityholder.**

*Except as set forth below in this Item 4, the undersigned is not the beneficial or registered owner of any securities of the Company other than thesecurities issuable pursuant to the Subscription Agreement.*

(a) Type and Amount of other securities beneficially owned by the Selling Securityholder: 

 

 

 

 

**5. Relationships with the Company:**

*Except as set forth below, neither the undersigned nor any of its affiliates, officers, directors or principal equity holders (owners of 5% of more of theequity securities of the undersigned) has held any position or office or has had any other material relationship with the Company (or its predecessors or affiliates) during the past three years.*

State any exceptions here: 

 

 

 

 

The undersigned agrees to promptly notify the Companyof any inaccuracies or changes in the information provided herein that may occur subsequent to the date hereof at any time while the Registration Statement remains effective. 

By signing below, the undersigned consents to the disclosure of the information contained herein in its answers to Items 1 through 5 and the inclusion of suchinformation in the Registration Statement and the related prospectus and any amendments or supplements thereto. The undersigned understands that such information will be relied upon by the Company in connection with the preparation or amendment ofthe Registration Statement and the related prospectus. 

IN WITNESS WHEREOF the undersigned, by authority duly given, has caused this Notice andQuestionnaire to be executed and delivered either in person or by its duly authorized agent. 

Date: 

 
Beneficial Owner:By:
 
Name:Title:
**[SIGNATURE PAGE FOR SELLING SECURITYHOLDER NOTICE AND QUESTIONNAIRE]**