Melanocyte System for Studying Stem Cell Niche -- Establishment and Manipulation of Monkey and Human Embryonic Stem Cell Lines for Biomedical Research -- Human Embryonic Stem Cell Derivation and Directed Differentiation -- In Search of the Elusive Epidermal Stem Cell -- Corneal Cells for Regeneration -- Polycomb Gene Product Bmi-1 Regulates Stem Cell Self-Renewal -- Directed Differentiation of …