1. From the Program in Integrative Cardiac Metabolism (N.H.B., J.M.O., E.D.L.), Center for Cardiovascular Research, University of Illinois at Chicago College of Medicine, Chicago; Sanford-Burnham Medical Research Institute (A.R.W., E.D.A.), Orlando, Fla; and Division of Endocrinology Metabolism and Diabetes and Program in Molecular Medicine (T.C.L., D.P.K.), University of Utah School of Medicine, Salt Lake City.