Kenneth M. Merz received his PhD in organic chemistry at the University of Texas at Austin and completed postdoctoral research at Cornell University and the University of California, San Francisco. He is a member of the Quantum Theory Project and Professor of Chemistry at the University of Florida, Gainesville. Dagmar Ringe received her PhD in biochemistry at Boston University. She is Professor of Biochemistry and Chemistry in the Rosenstiel Basic Medical Sciences Research Center at Brandeis University, Waltham, Massachusetts. Charles H. Reynolds received his PhD in theoretical organic chemistry at the University of Texas, Austin. He is a Research Fellow at Johnson & Johnson Pharmaceutical Research and Development, Spring House, Pennsylvania.