Paul M. Wassarman, the Series Editor of CTDB since 2007, is Professor in the Dept. Developmental and Regenerative Biology at the Icahn School of Medicine at Mount Sinai in New York City. He received a Ph.D. in biochemistry from Brandeis University where he carried out thesis research in the Graduate Dept. Biochemistry with Professor Nathan O. Kaplan. In 1967 Wassarman joined the Division of Structural Studies at the MRC, Laboratory of Molecular Biology in Cambridge, England as a Helen Hay Whitney Foundation Fellow with Sir John C. Kendrew. In 1972 he joined the faculty of the Dept. Biological Chemistry at Harvard Medical School and in 1986 moved to the Roche Institute of Molecular Biology where he was Chair of the Dept. Cell and Developmental Biology and Adjunct Professor in the Dept. Cell Biology, New York University School of Medicine. In 1996 he moved to the Icahn School of Medicine at Mount Sinai where he was the Lillian and Henry M. Stratton Professorial Chair of the Dept. Molecular, Cell, and Developmental Biology. Wassarman has published more than 200 research papers and reviews, dealing primarily with mammalian oogenesis, fertilization, and early embryogenesis.