David Wemmer is Professor of Chemistry at the University of California, Berkeley and has served as Vice Chair, Assistant Dean, and Executive Associate Dean since joining the faculty in 1985. His research in structural biology uses magnetic resonance methods to investigate the structure of proteins and DNA toward a better understanding of how these molecules function. Systems studied include DNA-ligand complexes, covalent DNA adducts, protein-DNA complexes, and diverse proteins involved in cellular regulatory processes. Wemmer is a Fellow of the AAAS and a member of Phi Kappa Phi and Sigma Xi.