Partial List of Companies Developing Xenotransplantation

(in alphabetical order)

• Alexion Pharmaceuticals

• Algenix

• Baxter Healthcare/Nextran

• Biohybrid

• Biotransplant/Immerge BioTherapeutics (Novartis venture)

• Circe Biomedical

• Cytotherapeutics, Inc.

• Diacrin

• Diatranz

• Excorp Medical

• Genzyme

• Infigen

• Neocrin

• Novartis

• Organogenesis, Inc.
  — Advanced Technology Program Technology Brief

• PPL Therapeutics/Geron Biomed

• Xenogen