GPC Biotech AG Schedules Conference Call For Today, Monday, September 25 To Discuss Positive Results From The Satraplatin Pivotal Phase 3 Trial

MARTINSRIED/MUNICH, Germany, Sept. 25 /PRNewswire-FirstCall/ -- Waltham, Mass. and Princeton, N.J. -- GPC Biotech AG today announced that it will hold a conference call today, Monday, September 25, 2006 to discuss positive results from the satraplatin pivotal phase 3 trial in second-line hormone refractory prostate cancer announced yesterday.

The call will be held today at 14:00 CEST/8:00 AM EDT. Participants may listen via live webcast, accessible through the GPC Biotech Web site at http://www.gpc-biotech.com or via telephone. A replay will be available via the Web site following the live event.

The dial-in numbers for the call are as follows: European participants: 0049-(0)69-5007-1846 U.S. participants: 1-800-573-4752 (toll-free)

GPC Biotech AG is a biopharmaceutical company discovering and developing new anticancer drugs.

GPC Biotech’s lead product candidate - satraplatin - has achieved target enrollment in a Phase 3 registrational trial as a second-line chemotherapy treatment in hormone-refractory prostate cancer. The U.S. FDA has granted fast track designation to satraplatin for this indication, and GPC Biotech has begun the rolling NDA submission process for this compound. GPC Biotech is also developing a monoclonal antibody with a novel mechanism-of-action against a variety of lymphoid tumors, currently in Phase 1 clinical development, and has ongoing drug development and discovery programs that leverage its expertise in kinase inhibitors. GPC Biotech AG is headquartered in Martinsried/Munich (Germany), and its wholly owned U.S. subsidiary has sites in Waltham, Massachusetts and Princeton, New Jersey. For additional information, please visit GPC Biotech’s Web site at http://www.gpc-biotech.com.

For further information, please contact: GPC Biotech AG Fraunhoferstr. 20 82152 Martinsried/Munich, Germany Martin Braendle Director, Investor Relations & Corporate Communications Phone: +49 (0)89 8565-2693 ir@gpc-biotech.com In the U.S.: Laurie Doyle Director, Investor Relations & Corporate Communications Phone: +1 781 890 9007 X267 or +1 609 524 1000 usinvestors@gpc-biotech.com Additional Media Contacts: In Europe: Maitland Noonan Russo Brian HudspithPhone: +44(0)20 7379 5151 bhudspith@maitland.co.uk In the U.S.: Noonan Russo David Schull Phone: +1 858 546-4810 david.schull@eurorscg.com

GPC Biotech AG

CONTACT: Martin Braendle, Director, Investor Relations & CorporateCommunications, +49-89-8565-2693, ir@gpc-biotech.com, or Laurie Doyle,Director, Investor Relations & Corporate Communications, +1-781-890-9007ext. 267, or +1-609-524-1000, usinvestors@gpc-biotech.com, both of GPCBiotech AG; or In the U.S.: David Schull of Noonan Russo, +1-858-546-4810,david.schull@eurorscg.com; or In Europe: Brian Hudspith of Maitland NoonanRusso, +44-20-7379-5151, bhudspith@maitland.co.uk

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