Exhibit 10.17

THESE
SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR THE SECURITIES LAWS OF ANY STATE, AND ARE BEING OFFERED AND SOLD IN RELIANCE ON REGISTRATION EXEMPTIONS AVAILABLE
THEREUNDER. AS SUCH THE HOLDER MAY NOT BE ABLE TO RESELL THE SECURITIES UNLESS PURSUANT TO REGISTRATION UNDER FEDERAL AND STATE SECURITIES LAWS OR UNLESS A RESALE EXEMPTION UNDER SUCH LAWS EXISTS.

ADVANCED CELL TECHNOLOGY, INC.  CONVERTIBLE NOTE

|Up to $600,000.00 |  | Alameda, California
August 14, 2007
|----------------- |  | -----------------------------------

1.Promise to Pay.FOR VALUE RECEIVED, the undersigned,ADVANCED
CELL TECHNOLOGY, INC., a Delaware corporation (referred to alternatively as the "Maker" or the
"Company"), promises to pay to the PDP I, LLC, a Delaware limited liability company, or its assigns (the
"Noteholder"), at such place as the Noteholder hereof shall notify the Maker in writing the principal amount of up to

Six Hundred Thousand Dollars ($600,000)

or
so much of that sum as may be advanced and outstanding under this Convertible Promissory Note (this "Note"). This Note evidences a loan (the
"Loan") from the Noteholder to the Maker. Advances under this Note shall be added to the principal amount of the Loan, as and when made, as reflected in
the Advance Schedule attached hereto as Exhibit A. Each payment under this Note shall first be credited against accrued and unpaid interest, and the remainder shall be credited against
principal. All amounts payable under this Note shall be paid in lawful money of the United States of America during normal business hours on a business day, in immediately available funds. The
Noteholder shall advance the Maker the sum of Three Hundred Thousand Dollars ($300,000.00) upon execution of this Note. The Maker shall have the right (but not the obligation), in its sole discretion,
to request that the Noteholder fund the remaining Three Hundred Thousand ($300,000) to the Maker upon the request by the Noteholder at any time prior to the Maturity Date.

2.Principal.All outstanding principal and all accrued and unpaid interest and all
other amounts owed hereunder (the"Outstanding Balance"), unless earlier converted pursuant to the terms described herein, shall be due and payable in
one lump sum on September 30, 2007 (the"Maturity Date") unless the Note has earlier been converted.

3.Permitted Uses.The proceeds of the Loan may be used only for payment of Permitted
Expenses, as defined herein. As used herein, the term Permitted Expenses means reasonable and customary operating expenses and capital expenditures related to the ongoing operation of the Maker.

4.Interest.(a) The principal sum outstanding from time to time under this Note
shall bear interest at a rate equal to NINE percent (9%) per annum. If default is made in any payment due under this Note, interest shall thereafter accrue on the entire unpaid principal balance
hereunder at a per annum rate equal to EIGHTEEN percent (18%) (the "Default Rate"), from the date such payment became due until the Maker pays in full
all amounts due and payable hereunder. From and after the maturity of this Note, whether by acceleration or otherwise, all sums then due and payable under this Note, including all principal and all
accrued and unpaid interest, shall bear interest until paid in full at the Default Rate. Interest shall be payable in arrears on the last day of each month. Interest shall be calculated on the basis
of a 360-day year and actual days elapsed, which results in more interest than if a 365-day year were used.

(b)   Notwithstanding
anything to the contrary contained in this Note, in no event shall the Maker be required to pay interest on the principal amount outstanding under this
Note at a rate in excess of

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the
maximum nonusurious interest rate, if any, that at any time or from time to time may be contracted for, taken, reserved, charged or received on the outstanding principal balance under this Note
under the laws of the State of California (the "Maximum Lawful Rate"), and if the effective rate of interest which would otherwise be payable under this
Note would exceed the Maximum Lawful Rate, or if the Noteholder shall receive monies that are deemed to constitute interest which would increase the effective rate of interest payable under this Note
to a rate in excess of the Maximum Lawful Rate, then: (i) the amount of interest which would otherwise be payable under this Note shall be reduced to the Maximum Lawful Rate, and
(ii) any interest paid by the Maker in excess of the Maximum Lawful Rate shall, at the option of the Noteholder, be either refunded to the Maker or credited against the principal of this Note.
It is further agreed that, without limitation of the foregoing, all calculations of the rate of interest contracted for, charged or received by the Noteholder that are made for the purpose of
determining whether such rate exceeds the Maximum Lawful Rate shall be made, to the extent permitted by the applicable law (now or hereafter enacted), by amortizing, prorating and spreading in equal
parts during the period of the full stated term of the Loan all interest at any time contracted for, charged or received by the Noteholder. If at any time and from time to time: (x) the amount
of the interest payable to the Noteholder on any date shall be limited to the Maximum Lawful Rate pursuant to the provisions hereof, and (y) in respect of any subsequent interest computation
period the amount of any interest otherwise payable to the Noteholder would be less than the amount of interest payable to the Noteholder computed at the Maximum Lawful Rate, then the amount of
interest payable to the Noteholder in respect of such subsequent interest computation period shall continue to be computed at the Maximum Lawful Rate until the total amount of interest payable to the
Noteholder shall equal the total amount of interest which would have been payable to the Noteholder if the total amount of interest had been computed without giving effect to the limitations set forth
in this Section 4.

5.Conversion.



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6.Representations and Warranties.As an inducement to the Noteholder to make the Loan,
the Maker represents and warrants to the Noteholder that:



7.Affirmative Covenants; Noteholder Acknowledgement; Noteholder Representation.The
Maker agrees to provide the Noteholder with prompt notice of any written commitments entered into which, if closed, would constitute the Next Financing, and to provide the Noteholder with at least ten
days' prior notice of the closing of the Next Financing. The Noteholder (and each of its respective members), hereby acknowledge and understand that the Loan transaction requires the unanimous consent
of the holders of certain senior convertible debenture previously issued by the Maker. In the event Noteholder does not receive unanimous consent, the Maker will be subject to a default under the
senior debenture facility unless cured within the applicable period. The Noteholder hereby represents and warrants to the Maker that the Noteholder, is an "accredited investor' as that term is defined
in Rule 501(a) of Regulation D promulgated under the Securities Act.



9.Events of Default.Upon the occurrence of any of the following events (each, an
"Event of Default"):



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THEN,
automatically upon the occurrence of an Event of Default under clause (e) of this Section 9 and, in all other cases, at the option of the Noteholder, in each case without notice to
or demand upon the Maker or any other party, the entire principal balance hereof together with all accrued and unpaid interest thereon shall become immediately due and payable.

10.Capitalized Interest.On each anniversary of the date of any default hereunder and
while such default is continuing, all interest which has become payable and is then delinquent shall, without curing the default hereunder by reason of such delinquency, be added to the principal
amount due under this Note, and shall thereafter bear interest at the same rate as is applicable to principal.

11.Costs and Expenses.If any default occurs in any payment due under this Note, the
Maker and all guarantors and endorsers hereof, and their successors and assigns, promise to pay all costs and expenses, including attorneys' fees, incurred by the Noteholder hereof in collecting or
attempting to collect the indebtedness under this Note, whether or not any action or proceeding is commenced, and hereby waive the right to plead any and all statutes of limitation as a defense to a
demand hereunder to the full extent permitted by law.

12.Acceptance of Past Due Payments and Indulgences Not Waivers.None of the provisions
hereof and none of the Noteholder's rights or remedies hereunder on account of any past or future defaults shall be deemed to have been waived by the Noteholder's acceptance of any past due
installments or by any indulgence granted by the Noteholder to the Maker.

13.Waivers by the Maker; No Setoffs or Counterclaims.The Maker and all guarantors and
endorsers hereof, and their successors and assigns, hereby waive presentment, demand, protest and notice thereof or of dishonor, and agree that they shall remain liable for all amounts due hereunder

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notwithstanding
any extension of time or change in the terms of payment of this Note granted by the Noteholder, any change, alteration or release of any property now or hereafter securing the payment
hereof or any delay or failure by the Noteholder to exercise any rights under this Note. All payments required by this Note shall be made without setoff or counterclaim.

14.Assignment.The Maker may not assign its rights or obligations under this Note
without the prior written consent of the Noteholder and any such purported assignment by the Maker without obtaining the prior written consent of the Noteholder shall be void ab initio. This Note shall
inure to the heirs, legal representatives, successors and assigns of the Noteholder.

15.Notices.All notices given by the Maker or the Noteholder hereunder to the other
shall be in writing, delivered by facsimile transmission (confirmed in writing) or delivered personally or by depositing the same in the United States mail, registered, with postage prepaid, addressed
as follows:

Noteholder:

PDP, LLCMaker:

Advanced Cell Technology, Inc.
1201 Harbor Bay Parkway, Ste. 120
Alameda, CA 94502


Either
the Noteholder or the Maker may change the address to which notices are to be sent by notice of such change to the other given as provided herein. Such notices shall be effective on the date
received or, if mailed, on the third business day following the date mailed.

16.Governing Law.This Note is governed by the laws of the State of California, without
regard to the choice of law rules of that State.

17.Waiver of Jury Trial.THE MAKER HEREBY WAIVES ANY RIGHT TO HAVE A JURY PARTICIPATE
IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT OR OTHERWISE ARISING OUT OF, CONNECTED WITH, RELATED TO OR INCIDENTAL TO THIS NOTE. INSTEAD, ANY DISPUTES RESOLVED IN COURT WILL BE
RESOLVED IN A BENCH TRIAL WITHOUT A JURY.

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IN
WITNESS WHEREOF, the Maker has caused this Convertible Note to be duly executed the day and year first above written.

| |  | ADVANCED CELL TECHNOLOGY, INC.,
a Delaware corporation
| |  | ------------------------------------------------------
| |  | By:                                                   

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