Document:

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                            ADVANCED BIOTHERAPY, INC.

                 2002 SUBORDINATED CONVERTIBLE PAY-IN-KIND NOTE

                                DUE JUNE 1, 2006

$_____________________                                      Dated:  June 1, 2002
                                                         Los Angeles, California

"NEITHER THIS CONVERTIBLE NOTE NOR ANY SECURITIES INTO WHICH IT IS CONVERTIBLE
HAS BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, OR ANY APPLICABLE
SECURITIES LAW OF ANY JURISDICTION AND IS A "RESTRICTED SECURITY" AS THAT TERM
IS DEFINED IN RULE 144 UNDER THE SECURITIES ACT AND HAS BEEN ACQUIRED FOR
INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR
DISTRIBUTION THEREOF. THIS CONVERTIBLE NOTE AND THE SECURITIES INTO WHICH IT IS
CONVERTIBLE MAY NOT BE TRANSFERRED UNTIL (i) A REGISTRATION STATEMENT UNDER SUCH
SECURITIES ACT OR SUCH APPLICABLE SECURITIES LAWS SHALL HAVE BECOME EFFECTIVE
WITH REGARD THERETO, OR (ii) IN THE OPINION OF COUNSEL ACCEPTABLE TO THE MAKER
REGISTRATION UNDER SUCH SECURITIES ACT OR SUCH APPLICABLE SECURITIES LAWS IS NOT
REQUIRED IN CONNECTION WITH SUCH PROPOSED TRANSFER."

FOR VALUE RECEIVED, the undersigned, Advanced Biotherapy, Inc., a Delaware
corporation ("Maker") hereby promises to pay to ("Holder") the principal sum of
Dollars ($ ), together with interest at the rate of eleven percent (11%) per
annum accrued from the Funding Date on the unpaid principal balance. "Funding
Date" means the date Maker shall have received from the Holder immediately
available funds in the original principal amount of this Convertible Note.
Principal and interest shall be payable in lawful money of the United States,
except as otherwise provided herein. Payments are to be made to the address of
the registered Holder of this Convertible Note as set forth on the records of
the Maker.

This Convertible Note is one of the Convertible Notes (which term, for all
purposes hereof includes the PIK Notes) designated as its 2002 Subordinated
Convertible Pay-In-Kind Notes due June 1, 2006 (the "Convertible Notes"), all of
like terms and maturity, except variations necessary to express the issuance
date, the principal amount and holder of each Convertible Note.

Interest is payable semi-annually on June 30 and December 31 (such date an
"Interest Payment Date") of each year at a rate of eleven percent (11%) per
annum commencing the June 30th or December 31st, immediately following the
Funding Date, whichever date comes first, to the holder of record on the date
that is ten (10) business days prior to such Interest Payment Date. Interest on
this Convertible Note will accrue from the most recent date to which interest
has been paid, or if no interest has been paid on the Convertible Note, from the
date of issuance. On each Interest Payment Date, the Maker may, at its option
and in its sole discretion, in lieu of the payment of interest in cash on the
Convertible Notes, pay interest on all outstanding Convertible Notes, in whole,
or in part, through the issuance of additional notes ("PIK Notes") in
denominations (rounded if necessary to the nearest dollar) of one dollar ($1.00)
and integral multiples thereof, in

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an aggregate principal amount equal to the amount of interest that would be
payable on such Convertible Notes, if such interest were paid in cash. On each
such Interest Payment Date that the Maker elects to deliver PIK Notes, the Maker
shall issue and deliver PIK Notes to the Holder entitled to such interest
payment or, with the prior written consent of the Holder and to the extent such
consent has not been revoked as to future delivery, in lieu of delivery of the
physical PIK Notes, shall make a record on its books of the PIK Notes so issued
without delivering physical PIK Notes to the Holders to whom such interest is
due. The outstanding principal balance together with accrued and unpaid interest
is due and payable in cash on June 30, 2005. This Convertible Note may be
prepaid, in whole or in part, at any time, and from time to time, without
premium or penalty. Any payment (in cash or in kind) received on this
Convertible Note shall be applied first to all accrued and unpaid interest and
then to the outstanding principal balance.

Each PIK Note is an additional obligation of the Maker and shall be governed by
and entitled to the benefits of, and shall be subject to the terms of that
Investor Rights Agreement, a copy of which has been presented to Holder. Each
Convertible Note shall rank pari passu with and be subject to the same terms
(including the interest rate from time to time payable thereon) as any other
Convertible Note (except, as the case may be, with respect to the issuance date,
aggregate principal amount) and shall rank pari passu with both the Company's
10% Convertible Subordinated Debt due September 30, 2004 ("2000 Convertible
Debt") and the Company's 2002 Subordinated Convertible Pay-In-Kind Notes due
September 30, 2004 ("First 2002 Convertible Notes").

1. Conversion. Subject to the terms hereof, the entire principal amount owing
under this Convertible Note, or any portion thereof, is convertible at the
option of Holder ("Conversion Right") at any time after the date hereof prior to
(and including) its maturity so long as Maker has not made a Call (defined
below) by issuing a Call Notice). This Convertible Note is convertible into
fully paid and non-assessable shares of Maker's common stock, $.001 par value
("Common Stock"), at the rate of one (1) share of Common Stock for each
Twenty-Five Cents ($0.25) ("Initial Conversion Price") of principal amount so
converted. Upon conversion, unpaid interest accrued on such principal so
converted shall be paid in cash or, at the option of Holder, paid in additional
shares of stock at the rate of one (1) share of Common Stock for each
Twenty-Five Cents ($0.25) of interest amount so converted. Shares issued upon
the conversion of this Convertible Note shall not be entitled to any dividend
declared prior to the date of such conversion.

Subject to the terms hereof, and subject to the Excluded Sales (defined below),
if at any time prior to December 31, 2003, inclusive, Maker sells Common Stock
at a price less than the Initial Conversion Price or sells rights to acquire
Common Stock at a price less than the Initial Conversion Price and such rights
are then currently exercisable at such lower price, then Holder shall be
entitled to exercise the Conversion Right at such lower

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price ("Price Adjustment") rather than the Initial Conversion Price. The
foregoing reduction of the Conversion Price shall not apply to any shares of
Common Stock issued or issuable upon the occurrence of one (1) or more of the
following events (collectively, " Excluded Sales"): (i) upon conversion of
Convertible Notes, (ii) the exercise of options, warrants, and other rights to
acquire Common Stock outstanding as of the date hereof, (iii) the exercise of
options, warrants and other rights to acquire Common Stock granted to directors,
officers, employees of, or consultants to, the Maker from and after the date
hereof, in a manner determined by the Maker's Board of Directors, or (iv) in
connection with any acquisition transaction or to financial institutions or
lessors in connection with commercial credit arrangements or other financings,
or to strategic partners or licensees and the like, which issuances are approved
by the Maker's Board of Directors, provided that the shares of Common Stock
issued or issuable pursuant to the Excluded Sales described in clauses (iii) and
(iv) above shall be cumulatively not more than 4,700,000 shares (as
appropriately adjusted for anti-dilution and any subsequent stock splits, stock
dividends, recapitalizations and the like); or (v) with the consent of the
holders of greater than fifty percent (50%) of the aggregate principal amount
then outstanding under all Convertible Notes; or (vi) with the consent of the
holders of greater than fifty percent (50%) of the aggregate principal amount
then outstanding under all First 2002 Notes; or (vii) with the consent of the
holders of greater than fifty percent (50%) of the aggregate principal amount
then outstanding under all 2000 Convertible Debt.

2. Automatic Conversion. If at any time, and from time to time, while this
Convertible Note is outstanding, the Market Price (defined below) of the Common
Stock is at least three hundred percent (300%) of the Initial Conversion Price
for at least a twenty (20) consecutive trading day period, Maker, upon written
notice ("Call Notice") to Holder, may cause all or a portion of the outstanding
principal balance of this Convertible Note to automatically convert to Common
Stock ("Call") at the conversion price in effect on the date of the Call Notice
given by Maker, conversion to be effective on the Interest Payment Date next
succeeding the giving of the Call Notice to Maker. The Maker shall then cancel
this Convertible Note, and, in the event that less than the entire principal
amount owing is so converted, the Maker shall promptly issue a new Convertible
Note for the principal balance not so converted, and convertible at the option
of the Holder, on the same terms and conditions as this Convertible Note. The
term "Market Price" shall mean, with respect to a given date, (i) if the Common
Stock is traded on the over-the-counter market and not in the NASDAQ National
Market System or on any national securities exchange, the average mean between
the per share closing bid and asked prices of the Common Stock on the trading
date in question, as reported by NASDAQ or an equivalent generally accepted
reporting service, or (ii) if the Common Stock is traded in the NASDAQ National
Market System or on a national securities exchange, the per share closing price
of the Common Stock in the NASDAQ National Market System or on the principal
stock exchange on which it is listed, as the case may be; provided, however, if
such Common Stock is traded both on a national stock exchange and the NASDAQ
National Market System, the closing prices on the principal stock exchange shall
be used. The closing price referred to in clause (ii) above shall be the last
reported sale price or, in case no such reported sale takes place on such day,
the average of the reported closing bid and asked prices, in either case in the
NASDAQ National Market system or on the national securities exchange on which
the Common Stock is then listed.

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3. Mechanics of Conversion. In order to exercise the Conversion Right granted
herein, the Holder shall surrender this Convertible Note to the Maker, with the
form for conversion hereinafter provided fully executed, whereupon the Maker
shall promptly issue to the Holder one or more share certificates of the Maker
representing the shares of Common Stock into which this Convertible Note is to
be convertible. The Maker shall then cancel this Convertible Note, and, in the
event that less than the entire principal amount owing is so converted, the
Maker shall promptly issue a new Convertible Note for the principal balance not
so converted, and convertible at the option of the Holder, on the same terms and
conditions as this Convertible Note.

4. Adjustments to Conversion Price. In the event of any stock split, stock
dividend, or similar distribution or in respect of the Common Stock occurring
after the date hereof (collectively "Splits"), the number of Common Stock shares
issuable upon conversion hereof shall be appropriately increased and the
conversion price stated above shall be appropriately adjusted. In the event of
any reverse stock split or similar subdivision occurring with respect to the
Common Stock after the date hereof (collectively "Reverse Splits"), the number
of shares of Common Stock issuable upon conversion hereof shall be approximately
decreased and the conversion price stated above shall be appropriated adjusted.
In the event of any Split or Reverse Split, the Common Stock price referred to
in the provisions relating to Price Adjustment and Excluded Sales shall be
appropriately adjusted consistent with the provisions immediately preceding this
sentence in this paragraph. In the event of any merger, consolidation,
reorganization, reclassification or similar event involving the Maker or the
Common Stock (other than a merger in which the Maker is the surviving entity),
then the type and amount of securities or other property that Holder shall be
entitled to receive upon conversion hereof shall be appropriately adjusted based
on the type and amount of securities or other property received by the holders
of the Common Stock in such transaction.

5. Pari Passu; Subordination. The Maker is authorized to issue promissory notes
or other debt, in such amounts as the Maker shall determine, which indebtedness,
including principal and interest, at all times ranks in the same parity, pari
passu with the Convertible Notes, without the consent of the holders of the
Convertible Notes.

        This Convertible Note and the indebtedness evidenced hereby, including
principal and interest, shall at all times remain junior and subordinate to
Superior Indebtedness. As used herein, the term "Superior Indebtedness" shall be
and mean any item of indebtedness which shall be designated as Superior
Indebtedness by the Maker (i) upon consent of the holders of greater than fifty
percent (50%) of the aggregate outstanding principal amount of all 2000
Convertible Debt; or (ii) upon consent of the holders of greater than fifty
percent (50%) of the aggregate outstanding principal amount of all First 2002
Convertible Notes; or (iii) upon consent of the holders of greater than fifty
percent (50%) of the aggregate outstanding principal amount of all Convertible
Notes.

        In the event of any liquidation, dissolution or winding up of Maker or
of any execution sale, receivership, insolvency, bankruptcy, liquidation,
readjustment, reorganization, or other civil proceeding relative to maker or its
property, all principal and interest owing on all Superior Indebtedness
(including interest accruing after such event) and all costs, fees and expenses
(including attorneys' fees related to the collection of Superior Indebtedness)
shall first be paid in full before any payment is made upon the indebted-

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ness evidenced by this Convertible Note; and in any such any payment or
distribution of any kind or character, whether in cash, property or securities
(other than in securities or other evidences of indebtedness, the payment of
which is subordinated to the payment of all Superior Indebtedness which may at
the time be outstanding including without limitation dividends payable on Common
Stock into which this Convertible Note may be converted), which shall be made
upon or in respect of this Convertible Note shall be held in trust and paid over
to the holders of such Superior Indebtedness, in accordance with their
respective rights, for the application and payment thereof unless and until such
Superior Indebtedness shall have been paid or satisfied in full. Further, in the
event that any portion of the indebtedness evidenced hereby shall become due and
payable before its express maturity by reason or acceleration pursuant hereto
(under circumstances when the provisions of the immediately preceding sentence
or the immediately succeeding sentence shall not be applicable), all principal
and interest owing on all Superior Indebtedness (including interest accruing
after such event) and all costs, fees and expenses (including attorneys' fees
relating to collection of Superior Indebtedness) shall be paid in full before
any payment is made upon the indebtedness evidenced hereby. During the
continuance of any default in the payment of either principal or interest on any
Superior Indebtedness, no payment of principal or interest shall be made hereon
if either (i) notice of such default in writing has been given to the Maker by
the holder or holders of such Superior Indebtedness or (ii) judicial proceedings
shall be commenced or pending in respect of such default. Maker forthwith upon
receipt of any notice received by it pursuant to the immediately preceding
sentence shall send a copy thereof to Holder.

        Holder, by acceptance hereof, agrees to accept no payment by Maker on
account of the indebtedness of evidenced hereby in violation of the provisions
of the immediately preceding paragraph and further agrees that any such payment
so accepted may be recovered by the holders of Superior Indebtedness and such
payments shall be held in trust and immediately paid over to the holders of the
Superior Indebtedness. Holder undertakes and agrees for the benefit of each
holder of Superior Indebtedness to execute, verify, deliver and file any proofs
of claims, consents, assignments or other instruments which any holder of
Superior Indebtedness may at any time require in order to confirm, prove or
realize upon any rights or claims pertaining to this Convertible Note and to
effectuate the full benefit of the subordination contained herein; and upon
failure of the Holder to do so, any holder of Superior Indebtedness shall be
deemed to be irrevocably appointed the agent and attorney-in-fact of Holder to
execute, verify, deliver and file any such proofs of claims, consents,
assignments or other instruments.

        The foregoing subordination provisions are for the benefit of the
holders of Superior Indebtedness and are solely for the purpose of defining the
relative rights of the holders of Superior Indebtedness on the one hand and
Holder on the other hand, and nothing herein shall impair, as between Maker and
Holder, the obligation of Maker to pay the principal and interest on this
Convertible Note in accordance with the terms hereof, which is unconditional and
absolute, nor shall anything herein prevent Holder from exercising all remedies
otherwise permitted by applicable law or hereunder upon default hereunder,
subject to the holders of Superior Indebtedness as herein provided for.

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        Holder, by acceptance hereof, acknowledges and agrees that the
subordination provisions set forth herein are, and are intended to be, an
inducement and a consideration to each holder of any Superior Indebtedness,
whether such Superior Indebtedness was created or acquired before or after the
issuance of this Convertible Note, to acquire and continue to hold, or to
continue to hold, such Superior Indebtedness, and such holder of Superior
Indebtedness shall be deemed conclusively to have relied upon such subordination
provisions in acquiring and continuing to hold, or in continuing to hold, such
Superior Indebtedness. No right of any present or future holder of any Superior
Indebtedness of Maker to enforce subordination as herein provided shall at any
time in any way be prejudiced or impaired by any act or failure to act on the
part of Maker or by any act or failure to act by any such holder, or by any
noncompliance by Maker with the terms, provisions and covenants of this
Convertible Note, regardless of any knowledgeable thereof any such holder may
have or be otherwise charged with.

6. Events of Default. The Holders of greater than fifty percent (50%) of the
then aggregate outstanding principal amount of all Convertible Notes, may, by
written notice to Maker, declare all or any part of the unpaid principal amount
of the Convertible Notes then outstanding to be forthwith due and payable upon
the occurrence of any one of the following events affecting the Maker ("Events
of Default"), and thereupon such unpaid principal balance or part thereof (as
applicable) together with interest accrued thereon shall become immediately due
and payable without further demand or notice:

        (i) Failure to make any payment when due and the failure to cure such
default within twenty (20) days after the receipt of written notice of such
default;

        (ii) Failure to honor Conversion Rights properly exercised in accordance
with the Convertible Notes and failure to cure such default within thirty (30)
days after receipt of written notice of such default;

        (iii) Maker's consent to (x) commencement of any proceeding against
Maker under any bankruptcy or insolvency law or (y) a general assignment for the
benefit of Maker's creditors or (z) the appointment of a receiver of any of
Maker's property; or

        (iv) Commencement by a third party of any proceeding against Maker under
any bankruptcy or insolvency law or appointment of a receiver for any part of
Maker's property without Maker's consent, if such proceeding has not been
discharged or appointment rescinded within one hundred twenty (120) days.

        Notwithstanding anything to the contrary herein, no Event of Default
shall occur or shall be deemed to occur, unless and until (i) an Event of
Default (as that term is defined in the 2000 Convertible Debt) shall have
occurred in accordance with the terms and conditions of the 2000 Convertible
Debt, to the extent then outstanding; and (ii) an Event of Default (as that term
is defined in the First 2002 Notes) shall have occurred in accordance with the
terms and conditions of the First 2002 Notes, to the extent then outstanding.

        No waiver by Holder of any payment or other right under this Convertible
Note shall operate as a waiver of any other payment or right, and no waiver
shall be valid unless and until in writing and signed either by (i) the Holder
or (ii) the holders of more

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than fifty percent (50%) of the aggregate outstanding principal amount of all
Convertible Notes. This Convertible Note may not be modified or terminated
orally but only by agreement or discharge in writing and signed by either Holder
or Maker of this Convertible Note, or by the holders of more than fifty percent
(50%) of the then aggregate principal amount of all Convertible Notes. Except as
set forth herein, the Holder of this Convertible Note shall not have the right
to sell, assign or otherwise transfer this Convertible Note or, prior to
registration thereof, the underlying Common Stock, without the prior written
consent of Maker in its sole discretion. Nothing contained in this Convertible
Note shall be deemed to prohibit or otherwise restrict any voluntary inter vivos
transfer by a Holder who is a natural person of all or a portion (in aggregate
principal amount not less than Fifty Thousand Dollars ($50,000)) of this
Convertible Note to an individual retirement account or in trust for the primary
benefit of any or all of such Holder, his or her spouse or the respective
parents, siblings, children or grandchildren (whether by blood or adoption)
(collectively "Family Members") or to a family partnership, limited liability
Maker or corporation, in which only such Holder, his or her spouse or their
Family Members are the partners, members or shareholders, as applicable
(collectively, "Estate Planning Entity"), provided that any such interest so
transferred to an Estate Planning Entity shall remain subject to the provisions
of this Convertible Note and the transferee shall comply with all terms herein.
This Convertible Note shall inure to the benefit of the parties and their
respective permitted successors, assigns, heirs and legal representatives.

7.      Miscellaneous.

        7.1. THIS CONVERTIBLE NOTE IS NOT NEGOTIABLE.

        7.2. Attorneys' Fees. In the event Holder shall incur costs, including
attorneys' fees, in enforcement and collection of this Convertible Note, whether
or not litigation is commenced, the prevailing party shall be entitled to
reasonable attorneys' fees and costs incurred in connection therewith. In the
event the Maker elects to exercise its rights to partially prepay or partially
Call the Convertible Notes, Maker shall do so among the holders pro rata in
proportion to the outstanding aggregate principal amounts thereof held by the
holders.

        7.3. Notices. All notices to be given under this Convertible Note shall
be in writing and shall be given either personally or by reputable overnight
courier service, or by facsimile with evidence of receipt, or by regular
first-class mail, or certified mail return receipt requested, addressed to the
Maker at the address shown below, or to the Holder at the address shown in the
Maker's records, or at any other address designated in writing by one party to
the Maker. All notices shall be deemed to have been given upon delivery in the
case of notices personally delivered, or at the expiration of one (1) business
day following delivery to the overnight courier service, or two (2) business
days following the deposit thereof in the United States mail, with postage
prepaid or on the first business day of receipt in the case of notices sent by
fax.

        7.4. Amendment; Successors and Assigns. This Convertible Note may not be
modified or amended, nor may any rights hereunder be waived, except in a writing
signed by the party against whom enforcement of the modification, amendment or

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waiver. This Convertible Note shall be binding upon and shall inure to the
benefit of the parties hereto and their respective successors and assigns.

        7.5. Governing Law. This Convertible Note shall be governed by, and
shall be construed and enforced in accordance with the internal laws of the
State of California, without regard to conflicts of laws principles.

IN WITNESS WHEREOF, the Maker has executed this Convertible Note as of the date
and at the place first written above.

                                    MAKER:

                                    Advanced Biotherapy, Inc.
                                    a Delaware corporation

                                    By: ____________________________________
                                        Edmond F. Buccellato, President and
                                        Chief Executive Officer

                                    Address:  Advanced Biotherapy Concepts, Inc.
                                              6355 Topanga Canyon Boulevard
                                              Suite 510
                                              Woodland Hills, CA  91367
                                    Facsimile: 818-883-3353

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                               ELECTION TO CONVERT

The undersigned Holder of the within Convertible Note hereby surrenders
$______________ of the aggregate principal amount of such instrument, and
$______________ of the aggregate accrued interest thereon, for conversion into
shares of Common Stock, $0.001 par value, of Advanced Biotherapy, Inc., in
accordance with the terms and conditions set forth in the Convertible Note
above, and hereby requests that such shares issuable upon such conversion be
issued to the undersigned.

                                        HOLDER

                                        ________________________________________
                                        Signature - Same as Registered Holder

                                        ________________________________________
                                        Print or Type Name

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                                                                   EXHIBIT 10.11

                            ADVANCED BIOTHERAPY, INC.

                            INVESTOR RIGHTS AGREEMENT

This Investor Rights Agreement (the "Agreement") is made as of the 1st day of
June, 2002, by and among Advanced Biotherapy, Inc., a Delaware corporation (the
"Company"), and the holders of 2002 Subordinated Convertible Pay-In-Kind Notes
due June 1, 2006, of the Company (each of whom is sometimes herein referred to
as an "Investor," and collectively as the "Investors") who have executed, or may
from time to time execute, an Investors Rights Agreement Joinder, generally in
the form attached hereto as Exhibit A. The Investors are identified on Schedule
A hereto, which will be amended from time to time to update the parties to this
Agreement.

                                    RECITALS

The Investors have subscribed for the Company's 2002 Subordinated Convertible
Pay-In-Kind Notes due June 1, 2006 ("Convertible Notes") evidenced by debt
instruments substantially in the form of Exhibit B pursuant to the Subscription
Agreement of even date herewith (the "Subscription Agreement"). The Company and
the Investors desire to enter into this Agreement in order to provide the
Investors with certain rights to register shares of the Company's common stock,
par value $0.001 ("Common Stock") underlying the Convertible Notes. The Company
desires to induce the Investors to purchase Convertible Notes by agreeing to the
terms and conditions set forth herein.

                                    AGREEMENT

The parties hereby agree as follows:

1.      Registration Rights The Company and the Investors covenant and agree as
        follows:

        1.1.    Definitions. For purposes of this Agreement:

                (a) 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 of 1933, as amended, or
successor statute, and applicable rules and regulations thereunder (the
"Securities Act"), and the declaration or ordering of effectiveness of such
registration statement or document;

                (b) The term "Registrable Securities" means (i) the shares of
Common Stock issuable or issued pursuant to the conversion of the Company's
Convertible Notes and (ii) any other shares of the Company's Common Stock issued
as (or issuable upon the conversion or exercise of any Convertible Notes,
warrant, right or other security which is issued as) a dividend or other
distribution with respect to, or in exchange for or in replacement of, the
shares listed in (i); provided, however, that the foregoing definition shall
exclude in all cases any Registrable Securities sold by a person in a
transaction in which such person's rights

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under this Agreement are not assigned. Notwithstanding the foregoing, neither
the Companys Common Stock nor its other securities shall be treated as
Registrable Securities if they have been (A) sold to or through a broker or
dealer or underwriter in a public distribution or a public securities
transaction, or (B) sold in a transaction exempt from the registration and
prospectus delivery requirements of the Securities Act under Section 4(1)
thereof so that all transfer restrictions, and restrictive legends with respect
thereto, if any, are removed upon the consummation of such sale;

                (c) The number of shares of "Registrable Securities then
outstanding" shall be determined by the number of shares of Common Stock
outstanding which are, and the number of shares of Common Stock issuable
pursuant to then exercisable or convertible securities which are, Registrable
Securities;

                (d) The term "Holder" means any person owning, or having the
right to acquire, Registrable Securities or any assignee thereof in accordance
with Section 1.8 of this Agreement;

                (e) The term "SEC" means the Securities and Exchange Commission;
and

        1.2 Company Registration. The Company shall notify all Holders in
writing at least fifteen (15) days prior to the filing of a registration
statement under the Securities Act for purposes of a public offering of
securities of the Company (including, but not limited to, registration
statements relating to secondary offerings of securities of the Company, but
excluding registration statements relating to employee benefit plans or debt
securities, with respect to corporate reorganizations or other transactions
under Rule 145 of the Securities Act or a registration on any registration form
that does not permit secondary sales) and will afford each such Holder an
opportunity to include in such registration statement all or part of such
Registrable Securities held by such Holder. Each Holder desiring to include in
any such registration statement all or any part of the Registrable Securities by
it shall, within fifteen (15) days after the above-described notice from the
Company, so notify the Company in writing. Such notice shall state the intended
method of disposition of the Registrable Securities by such Holder. If a Holder
decides not to include all of its Registrable Securities in any registration
statement thereafter filed by the Company, such Holder shall 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 offerings of its securities, all upon the terms and
conditions set forth herein. The Company shall have the right to terminate or
withdraw any registration initiated by it under this Section 1.2 prior to the
effectiveness of such registration whether or not any Holder has elected to
include securities in such registration. The registration expenses of such
withdrawn registration shall be borne by the Company in accordance with Section
1.6 hereof.

        1.3 Form S-3 Registration. In the event that the Company shall receive,
from any Holder or Holders of not less than fifty percent (50%) of the
Registrable Securities then outstanding, a written request or requests that the
Company effect a registration on Form S-3 with respect to all or a part of the
Registrable Securities owned by such Holder

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or Holders, the Company shall:

                (a) promptly give written notice of the proposed registration,
and any related qualification or compliance, to all other Holders; and

                (b) as soon as practicable, effect such registration and all
such qualifications and compliances as may be so requested and as would permit
or facilitate the sale and distribution of all or such portion of such Holder's
or Holders' Registrable Securities as are specified in such request, together
with all or such portion of the Registrable Securities of any other Holder or
Holders joining in such request as are specified in a written request given
within fifteen (15) days after receipt of such written notice from the Company;
provided, however, that the Company shall not be obligated to effect any such
registration, qualification or compliance, pursuant to this Section 1.3:

                        (i) if Form S-3 is not available for such offering by
the Holders;

                        (ii) if the Holders, together with the holders of any
other securities of the Company entitled to inclusion in such registration,
propose to sell Registrable Securities and such other securities (if any) at an
aggregate price to the public before deducting any underwriters' discounts or
commissions) of less than $500,000;

                        (iii) if the Company shall furnish to the Holders a
certificate signed by the President of the Company stating that in the good
faith judgment of the Board of Directors of the Company, it would be seriously
detrimental to the Company and its stockholders for such Form S-3 registration
to be effected at such time, in which event the Company shall have the right to
defer the filing of the Form S-3 registration statement for a period of not more
than 180 days after receipt of the request of the Holder or Holders under this
Section 1.3; provided, however, that the Company shall not utilize this right
more than once in any twelve (12) month period pursuant to this Section
1.3(b)(iii);

                        (iv) if within thirty (30) days of receipt of a written
request from Initiating Holders pursuant to Section 1.3, the Company gives
notice to the Holders of the Company's intention to make a public offering
within ninety (90) days;

                        (v) if the Company has, within the twelve (12) month
period preceding the date of such request, effected a registration on Form S-3
for the Holders pursuant to this Section 1.3;

                        (vi) in any particular jurisdiction in which the Company
would be required to qualify to do business or to execute a general consent to
service of process in effecting such registration, qualification or compliance;
or

                        (vii) after the Company has effected one (1)
registration pursuant to Section 1.2 and such registration has been declared
effective or ordered effective.

Page 3 of 13
<PAGE>

                (c) Subject to the foregoing, the Company shall file a
registration statement covering the Registrable Securities so requested to be
registered as soon as practicable after receipt of the request or requests of
the Holders.

        1.4 Obligations of the Company. When required under this Section 1 to
effect the registration of any Registrable Securities, the Company shall, as
expeditiously as reasonably possible:

                (a) Prepare and file with the SEC a registration statement with
respect to such Registrable Securities and use its reasonable best efforts to
cause such registration statement to become effective, and, upon the request of
the Holders of a majority of the Registrable Securities registered thereunder,
keep such registration statement effective up to one (1) year following the date
that such registration statement shall become effective, but in no event later
than September 30, 2006 ("Expiration Date"). The Company shall be required to
file, cause to become effective or maintain the effectiveness of any
registration statement that contemplates a distribution of securities on a
delayed or continuous basis pursuant to Rule 415 under the Securities Act,
subject to such Expiration Date.

                (b) Prepare and file with the SEC such amendments and
supplements to such registration statement and the prospectus used in 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 through the Expiration Date,
inclusive.

                (c) Furnish to the Holders such numbers of copies of a
prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents as they may
reasonably request in order to facilitate the disposition of Registrable
Securities owned by them.

                (d) Use its reasonable 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
Holders holding a majority of the Registrable Securities then outstanding,
provided that the Company 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) Notify each Holder of Registrable Securities at any time
when a prospectus relating thereto is required to be delivered under the
Securities Act 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 make the statements therein not misleading in the
light of the circumstances then existing, such obligation to continue through
the Expiration Date, inclusive.

                (f) Cause all such Registrable Securities registered pursuant to
such

Page 4 of 13
<PAGE>

registration statement to be listed on any securities exchange on which similar
securities issued by the Company are then listed.

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

        1.5 Furnish Information. It shall be a condition precedent to the
obligations of the Company to take any action pursuant to this Section 1 with
respect to the Registrable Securities of any selling Holder that such Holder
shall furnish to the Company such information regarding itself, the Registrable
Securities held by it, and the intended method of disposition of such securities
as shall be required to effect the registration of such Holder's Registrable
Securities.

        1.6 Expenses of Registration.

                (a) Company Registration. All expenses, other than underwriting
discounts and commissions, incurred in connection with registrations, filings or
qualifications of Registrable Securities pursuant to Section 1.2 for each Holder
(which right may be assigned as provided in Section 1.11), including (without
limitation) all registration, filing, and qualification fees, printers' and
accounting fees, fees and disbursements of counsel for the Company and the
reasonable fees and disbursements of one counsel for the selling Holder or
Holders selected by them with the approval of the Company, which approval shall
not be unreasonably withheld, shall be borne by the Company.

                (b) Registration on Form S-3. All expenses other than
underwriting discounts and commissions incurred in connection with two (2)
registrations requested pursuant to Section 1.3, including (without limitation)
all registration, filing, qualification, printers' and accounting fees and the
fees and disbursements of counsel for the Company shall be borne by the Company.

                (c) Notwithstanding anything to the contrary herein, the Holders
shall bear full responsibility for all costs and expenses of any kind occurred
in connection with any underwriting, distribution, offer, sale or other
transfers of Registrable Securities, including, without limitation, underwriting
discounts and commissions.

        1.7 Underwriting Requirements. In connection with any offering involving
an underwriting of shares of the Company's capital stock, the Company shall not
be required under Section 1.2 or 1.3 to include any of the Holders' securities
in such underwriting unless they accept the terms of the underwriting as agreed
upon between the Company and the underwriters selected by it (or by other
persons entitled to select the underwriters), and then only in such quantity as
the underwriters determine in their sole discretion will not jeopardize the
success of the offering by the Company. If the total amount of securities,

Page 5 of 13
<PAGE>

including Registrable Securities, requested by stockholders to be included in
such offering exceeds the amount of securities sold other than by the Company
that the underwriters determine in their sole discretion is compatible with the
success of the offering, then the Company shall be required to include in the
offering only that number of such securities, including Registrable Securities,
which the underwriters determine in their sole discretion will not jeopardize
the success of the offering (the securities so included to be first taken from
the Holders of Registrable Securities and apportioned pro rata among the selling
stockholders according to the total amount of securities entitled to be included
therein owned by each selling stockholder or in such other proportions as shall
mutually be agreed to by such selling stockholders, but in no event shall any
shares being sold by a stockholder exercising registration rights pursuant to
Section 1.3 be excluded from such offering. For purposes of the preceding
sentence concerning apportionment, for any Holder which is a partnership or
corporation, the partners, retired partners and stockholders of such Holder, or
the estates and family members of any such partners and retired partners and any
trusts for the benefit of any of the foregoing persons, shall be deemed to be a
single "selling stockholder," and any pro-rata reduction with respect to such
"selling stockholder" shall be based upon the aggregate amount of shares
carrying registration rights owned by all entities and individuals included in
such "selling stockholder," as defined in this sentence.

        1.8 Delay of Registration. No Holder 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.

        1.9 Indemnification. In the event any Registrable Securities are
included in a registration statement under this Section 1:

                (a) To the extent permitted by law, the Company will indemnify
and hold harmless each Holder and, if applicable, any underwriter (as defined in
the Securities Act) for such Holder and each person, if any, who controls such
Holder, or underwriter within the meaning of the Securities Act or the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), against any
losses, claims, damages, or liabilities (joint or several) to which they may
become subject under the Securities Act, the Exchange Act or other federal or
state law, insofar as such losses, claims, damages, or liabilities (or actions
in respect thereof) arise out of or are based upon any of the following
statements, omissions or violations (collectively a "Violation"): (i) any untrue
statement or alleged untrue statement of a material fact contained in such
registration statement, including any preliminary prospectus or final prospectus
contained therein or any amendments or supplements thereto, (ii) the omission or
alleged omission to state therein a material fact required to be stated therein,
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 the Securities Act, the Exchange Act or any state securities law; and the
Company will pay to each such Holder, underwriter or controlling person, as
incurred, any legal or other expenses reasonably incurred by them in connection
with investigating or defending any such loss, claim, damage, liability, or
action; provided, however, that the indemnity agreement contained in this
subsec-

Page 6 of 13
<PAGE>
tion 1.9(a) 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 Company (which consent shall not be unreasonably withheld), nor
shall the Company be liable to any Holder, underwriter or controlling person for
any such loss, claim, damage, liability, or action to the extent that it arises
out of or is based upon a Violation which occurs in reliance upon and in
conformity with written information furnished expressly for use in connection
with such registration by any such Holder, underwriter or controlling person.

                (b) To the extent permitted by law, each selling Holder will
indemnify and hold harmless the Company, each of its directors, its officers and
each person who has signed the registration statement, each person, if any, who
controls the Company within the meaning of the Securities Act, any underwriter,
any other Holder selling securities in such registration statement and any
controlling person of any such underwriter or other Holder against any losses,
claims, damages, or liabilities (joint or several) to which any of the foregoing
persons may become subject, under the Securities Act, the Exchange Act or other
federal or state law, insofar as such losses, claims, damages, or liabilities
(or actions in respect thereto) arise out of or are based upon any Violation, 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
Holder expressly for use in connection with such registration; and each such
Holder will pay, as incurred, any legal or other expenses reasonably incurred by
any person intended to be indemnified pursuant to this subsection 1.9(b), in
connection with investigating or defending any such loss, claim, damage,
liability, or action; provided, however, that the indemnity agreement contained
in this sub section 1.9(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 Holder which consent shall not be unreasonably
withheld; further, that in no event shall the amounts payable in indemnity by a
Holder under this subsection 1.9(b) in respect of a Violation exceed the net
proceeds received by such Holder in the registered offering out of which such
Violation arises.

                (c) Promptly after receipt by an indemnified party under this
Section 1.9 of notice of the commencement 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 1.9, deliver to
the indemnifying party a written notice of 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 with counsel mutually
satisfactory to the parties; provided, however , that an indemnified party
(together with all other indemnified parties which may be represented without
conflict by one counsel) shall have the right to retain one separate counsel,
with the reasonable 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
interests between such indemnified party and any other party represented by such
counsel in such proceeding. The failure to deliver written notice to the

Page 7 of 13
<PAGE>

indemnifying party within a reasonable time of the commencement of any such
action shall relieve such indemnifying party of liability to the indemnified
party under this Section 1.9 to the extent that the indemnifying party has been
prejudiced thereby, but the omission so to deliver written notice to the
indemnifying party will not relieve it of any liability that it may have to any
indemnified party otherwise than under this Section 1.9.

                (d) If the indemnification provided for in this Section 1.9 is
held by a court of competent jurisdiction to be unavailable to an indemnified
party with respect to any loss, liability, claim, damage or expense referred to
therein, then the indemnifying party, in lieu of indemnifying such indemnified
party hereunder, shall contribute to the amount paid or payable by such
indemnified party as a result of such loss, liability, 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 the indemnified party on the other in
connection with the statements or omissions that resulted in such loss,
liability, claim, damage or expense as well as any other relevant equitable
considerations; provided, that in no event shall the amounts payable in
contribution by a Holder under this subsection 1.9(d) in respect of a Violation
exceed the net proceeds received by such Holder in the registered offering out
of which Violation arises. The relative fault of the 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 or the
omission to state a material fact relates to information supplied by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge, access to information, and opportunity to correct or prevent such
statement or omission.

                (e) The obligations of the Company and Holders under this
Section 1.9 shall survive the completion of any offering of Registrable
Securities in a registration statement under this Section 1, and otherwise.

        1.10 Reports Under Securities Exchange Act of 1934. With a view to
making available to the Holders the benefits of Rule 144 promulgated under the
Securities Act and any other rule or regulation of the SEC that may at any time
permit a Holder to sell securities of the Company to the public without
registration, the Company agrees to:

                (a) make and keep public information available, as those terms
are understood and defined in SEC Rule 144, so long as the Company remains
subject to the periodic reporting requirements under Sections 13 or 15(d) of the
Exchange Act;

                (b) file with the SEC in a timely manner all reports and other
documents required of the Company under the Securities Act and the Exchange Act;
and

                (c) furnish to any Holder, so long as accurate and so long as
the Holder owns any Registrable Securities, forthwith upon request a written
statement by the Company that it has complied with the reporting requirements of
SEC Rule 144, the Securities Act and the Exchange Act, and such information as
may be reasonably requested in availing any Holder of any rule or regulation of
the SEC which permits the selling of any such securities without registration or
pursuant to such form.

        1.11 Assignment of Registration Rights. The rights to cause the Company
to register Registrable Securities pursuant to this Section 1 may be assigned
(but only with all

Page 8 of 13
<PAGE>

related obligations and together with the Registrable Securities and related
Convertible Notes as permitted pursuant to and in accordance with the
Convertible Notes), provided (i) the Company is, within ten (10) days after such
transfer, furnished with written notice of the name and address of such
transferee or assignee and the securities with respect to which such
registration rights are being assigned; (ii) such transferee agrees in writing
to be subject to all restrictions set forth in this Agreement and provided,
further, that such assignment shall be effective only if immediately following
such transfer the further disposition of such securities by the transferee or
assignee is restricted under the Securities Act.

        1.12 Termination of Registration Rights. No Holder shall be entitled to
exercise any right provided for in this Section 1 (i) on or after September 30,
2006, or (ii) during such times as Rule 144 (or another similar exemption under
the Securities Act) is available for the sale of all of such Holder's shares
during a three (3) month period without registration.

2. Arbitration. In the event of any controversy, dispute or claim arising out of
or related to this Agreement, the Subscription Agreement or the Convertible
Notes, or the interpretation, breach, termination or validity hereof or thereof,
the parties shall submit such controversy, dispute or claim to binding
arbitration hereunder. All arbitration proceedings pursuant to this Section
shall be before a retired judge of the United States District Court for the
Central District of California, Los Angeles Division, or the Los Angeles County
Superior Court or such other arbitrator as the parties shall mutually agree
upon. In the event that the parties are unable to agree upon the selection of an
arbitrator, any party may request the presiding judge of the United States
District Court for the Central District of California, Los Angeles Division, or
the Los Angeles County Superior Court to appoint such arbitrator. Arbitration of
the dispute shall commence no later than thirty (30) days after the selection or
appointment of such arbitrator. The arbitrator shall be bound by the express
terms of this Agreement and shall endeavor to reach his or her decision as
quickly as possible, which decision shall be final and binding on the parties to
this Agreement. The arbitrator shall also have the power to award costs and
expenses (including, without limitation, reasonable attorneys' fees) to the
prevailing party. Application to enforce the arbitrator's decision can be made
in any court or other tribunal of competent jurisdiction; any other application
or dispute shall be submitted to the United States District Court for the
Central District of California, Los Angeles Division, or the Los Angeles County
Superior Court for determination. The rules of discovery then pertaining to the
United States District Court for the Central District of California, Los Angeles
Division, or a California Court of Law, as the case may be, shall apply to any
such arbitration, including, without limitation, Sections 1283.01 and 1283.05 of
the California Code of Civil Procedure, the provisions of which are hereby
incorporated herein and made a part hereof by reference. TO THE MAXIMUM EXTENT
PERMITTED BY LAW, THE PARTIES HEREBY IRREVOCABLY WAIVE ANY RIGHT THEY MAY HAVE
TO JURY TRIAL OR TO ASSERT THE DOCTRINE OF INCONVENIENT FORUM OR TO OBJECT TO
VENUE TO THE EXTENT ANY ACTION SUIT, ARBITRATION OR OTHER PROCEEDING IS BROUGHT
IN THE COUNTY OF LOS ANGELES, STATE OF CALIFORNIA.

3. Miscellaneous.

Page 9 of 13
<PAGE>

        3.1 Successors and Assigns. Except as otherwise provided in this
Agreement, the terms and conditions of this Agreement shall inure to the benefit
of and be binding upon the respective permitted successors and assigns of the
parties (including transferees of any Common Stock issued upon conversion or
exercise thereof). Nothing in this Agreement, express or implied, is intended to
confer upon any party other than the parties hereto or their respective
successors and assigns any rights, remedies, obligations, or liabilities under
or by reason of this Agreement, except as expressly provided in this Agreement.

        3.2 Amendments and Waivers. Any term of this Agreement may be amended or
waived only with the written consent of the Company and the holders of at least
a majority of the Registrable Securities then outstanding. Any amendment or
waiver effected in accordance with this paragraph shall be binding upon each
holder of any Registrable Securities then outstanding, each future holder of all
such Registrable Securities, and the Company.

        3.3 Notices. Unless otherwise provided, any notice required or permitted
by this Agreement shall be in writing and shall be deemed sufficient upon
delivery, when delivered personally or one (1) day after delivery by overnight
courier or sent by facsimile, or electronic mail provided that in each case, the
sender retains proof of receipt, or four (4) days after being deposited in the
U.S. mail, as certified or registered mail, with postage prepaid, addressed to
the party to be notified at such party's address as set forth on the signature
pages hereto or as subsequently modified by written notice.

        3.4 Severability. If one or more provisions of this Agreement are held
to be unenforceable under applicable law, the parties agree to renegotiate such
provision in good faith. In the event that the parties cannot reach a mutually
agreeable and enforceable replacement for such provision, then (a) such
provision shall be excluded from this Agreement, (b) the balance of the
Agreement shall be interpreted as if such provision were so excluded and (c) the
balance of the Agreement shall be enforceable in accordance with its terms.

        3.5 Governing Law. This agreement and all acts and transactions pursuant
hereto shall be governed, construed and interpreted in accordance with the laws
of the State of California, without giving effect to principles of conflicts of
laws.

        3.6 Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

        3.7 Recovery of Fees and Costs. In the event that any legal, equitable,
arbitration or other proceeding is brought for the enforcement of this
Agreement, or because of an alleged dispute, breach, default, termination or
invalidity in connection with any provision of this Agreement, the successful or
prevailing party shall be entitled to recover reasonable attorneys' fees and
costs incurred in such proceeding, in addition to any other relief

Page 10 of 13
<PAGE>

to which such party may be entitled.

        3.8 Drafting Presumption. It is acknowledged that the parties and their
respective agents have participated in an arms'-length negotiation in the
preparation of this Agreement. As a consequence, the parties agree that no
presumption shall be applied in any interpretation of this Agreement that the
terms hereof shall be more strictly construed against one party by reason of any
rule or construction that a document is to be construed more strictly against
the party who prepared the same, whether through such party's agents or
otherwise and the parties expressly waive the application of Section 1654 of the
California Civil Code.

        3.9 Entire Agreement. This Agreement and the documents referred to
herein, constitute the entire agreement between the parties hereto pertaining to
the subject matter hereof and any and all other written or oral agreements
existing between the parties hereto are expressly canceled.

        3.10 Titles and Subtitles. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

        The parties hereto have executed this Investor Rights Agreement as of
the date first written above.

COMPANY:                                    INVESTORS:
ADVANCED BIOTHERAPY, INC.
a Delaware corporation                      WITH RESPECT TO THE INVESTORS, THE
                                            SIGNATURE PAGE TO THIS AGREEMENT
By:                                         CONSISTS OF THE INVESTOR RIGHTS
   -----------------------------------      AGREEMENT JOINDER, WHICH, IN SOME
    Edmond F. Buccellato, President         CASES, WILL BE INCLUDED AS PART OF
    and Chief Executive Officer             THE SUBSCRIPTION AGREEMENT SIGNATURE
                                            PAGE.
Address: Advanced Biotherapy
         Concepts, Inc.
         6355 Topanga Canyon Boulevard
         Suite 510
         Woodland Hills, CA 91367
Fax:     818-883-3353

Page 11 of 13
<PAGE>

                                    EXHIBIT A
                          TO INVESTOR RIGHTS AGREEMENT

                        INVESTOR RIGHTS AGREEMENT JOINDER

        By signing and returning this Investor Rights Agreement Joinder, the
undersigned agrees to be a party to that certain Investor Rights Agreement, by
and between the Company and the Investors identified therein, a copy of which
has been presented to the undersigned along with the Investor Rights Agreement
Joinder. The undersigned shall have all rights, and shall observe all the
obligations, applicable to an "Investor" as set forth in the Investor Rights
Agreement. In order to give effect to this transaction, please add the
undersigned to the list of "Investors" as set forth in Schedule A to the
Investor Rights Agreement effective upon execution of this Investor Rights
Agreement Joinder and acceptance by the Company of the undersigned's
subscription.

Date:
     ---------------------

INVESTOR:

----------------------------------
[Signature]

----------------------------------
[Print or Type Name]

Address:

----------------------------------

----------------------------------

----------------------------------

Social Security Number:

----------------------------------

Page 12 of 13
<PAGE>

                                   SCHEDULE A
                          TO INVESTOR RIGHTS AGREEMENT

                                    INVESTORS

Name/Address/Fax No.                       Principal Amount of Convertible Notes

                                           $
                                            ------------------------
----------------------------------

----------------------------------

----------------------------------

----------------------------------

----------------------------------

Page 13 of 13

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