Joint Filing Agreement

                            Joint Filing Agreement


                  The undersigned hereby consent to the joint filing by any of
them of a Statement on Schedule 13D and any amendments thereto, whether
heretofore or hereafter filed, relating to the common stock, par value $.001 per
share, of GeneMedicine, Inc.

Dated: January 29, 1997


                                                    /s/ XXXXX XXXXX
                                                   -------------------------
                                                   Xxxxx Xxxxx


                                                   X. XXXXX & CO.

                                                   By: /s/ XXXXX XXXXX
                                                      ----------------------
                                                      Xxxxx Xxxxx, President