Dr Levin is a Clinician-Scientist and Distinguished Professor of Medicine and Biochemistry at the University of California School of Medicine in the USA. Dr Levin is Vice-Chairman of the Department of Medicine and Chief, Endocrinology, Diabetes, and Metabolism at UC-Irvine and the Long Beach VA Medical Center.

He is an elected member of the Association of American Physicians, and is a current Associate Editor of the Journal, Endocrinology, for a 4^th year. Dr Levin has been a keynote or plenary speaker at numerous meetings including the Endocrine Society Annual Meeting, Israeli Annual Endocrine Society Meeting, FASEB, and Keystone Conferences. He was awarded the 2013 Solomon Berson Distinguished Lecture Award by the American Physiological Society.

Dr Levin’s research focus since 1996 has been on extra-nuclear estrogen receptors in the vasculature and heart, breast cancer, and stem cell maturation. He defined that all sex steroid receptors (estrogen, progesterone, and androgen classic receptors) are palmitoylated and the sites were defined and found to be necessary for translocation to the plasma membrane. There these receptors respond to the sex steroid ligand with activation of multiple signaling pathways as G-protein coupled receptors. His lab has more recently defined the importance of the membrane receptor as being required and sometimes sufficient to regulate cell function and key gene expression. However for most gene regulation by the nuclear receptor, signaling by membrane ER is required for the ability of the nuclear ER pool to alter gene expression and subsequent development of function of the cell.