1. From CV Dynamics, Inc (Y.-T.S., P.A., S.F.V.), North Brunswick, NJ; Cytokinetics, Inc (F.I.M., D.J.M.), South San Francisco, Calif; the Department of Cell Biology and Molecular Medicine and Cardiovascular Research Institute (Y.-T.S., X.Z., C.D., S.F.V.), New Jersey Medical School, UMDNJ, Newark, NJ; and the Department of Mathematical Sciences (S.K.D.), New Jersey Institute of Technology, Newark, NJ.