Dr. Ho Sung Cho is Executive Director, Biotherapeutics at Celgene. Dr. Cho is a Protein Medicinal Chemist with over 24 years of experience in recombinant protein expression, purification, modification, and analysis. Prior to joining industry, Dr. Cho worked on the structural genomics project at the Lawrence Berkeley National Labs. He received his Ph. D. in Chemistry from the University of California at Berkeley.