CHARLES R. CANTOR, formerly principal scientist of the DOE Human Genome Project, is the Chief Scientific Officer of Sequenom, Inc., in San Diego. Dr. Cantor is on leave from Boston University, where he is Professor of Biomedical Engineering and Director of the Center for Advanced Biotechnology. CASSANDRA L. SMITH is Deputy Director of the Center for Advanced Biotechnology and Professor of Biomedical Engineering, Biology, and Pharmacology at Boston University.