Douglas Melton, Ph.D. Dr. Melton is the Xander University Professor at Harvard, a Howard Hughes Medical Institute Investigator and the Co-director of the Harvard Stem Cell Institute. He also serves, with his wife, Gail, as Faculty Dean of Eliot House at Harvard. Dr. Melton’s laboratory studies how cell differentiation is directed during development, with a particular focus on the genes and cells that make pancreatic tissue, with the goal of making pancreatic cells for transplantation into diabetics. Dr Melton is a co-founder of Gilead Sciences and founded Semma Therapeutics.