Exhibit 99.1 EXHIBIT 99.1 Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required on Amendment No. 3 to Schedule 13G need be filed with respect to...

                                                                    Exhibit 99.1



                                  EXHIBIT 99.1


         Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934,
the undersigned hereby agree that only one statement containing the information
required on Amendment No. 3 to Schedule 13G need be filed with respect to
ownership by each of the undersigned of shares of common stock of BioSante
Pharmaceuticals, Inc.

         This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original.

Dated:  February 12, 0000


/x/ XXXX XXXXXXX
-----------------------------
Xxxx Xxxxxxx


Jo & Co.

By:   /s/ XXXX XXXXXXX
   -----------------------------------------
Name: Xxxx Xxxxxxx
Its:  President


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