1. Department of Cell and Developmental Biology and Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, Department of Clinical Biochemistry, Hebrew University-Hadassah Medical Centers, Jerusalem, Israel IL-91120, Department of Biological Sciences, University of Delaware, Newark, Delaware 19716, Department of Medicine, Northwest Lipid Research Laboratories, 2121 North 35th Street, Seattle, Washington 98103, and Department of...