The Site of Biosynthesis of Mammalian Tyrosinase11From the Research Laboratories of the Department of Dermatology of the Harvard Medical School at the Massachusetts General Hospital, Boston 14, Massachusetts and The Chester Beatty Research Institute, Institute of Cancer Research, Royal Cancer Hospital, London, S.W.3, England.This work was supported by Grant #CY-5010 of the National Institutes of Health, U.S. Public Health Service, Department of Health, Education and Welfare and by Grant 257-E of the Damon Runyon Memorial Fund for Cancer Research, Inc.Presented at the Twenty-second Annual Meeting of The Society for Investigative Dermatology, Inc., New York, N.Y., June 27, 1961.