1. From the Center for Lung Biology (S.W., D.A., S.L.S., H.C., D.L.C., J.K., J.R.C., M.T., T.S.) and Departments of Chemistry (E.A.C.), Pathology (J.K.), Pharmacology (S.W., S.L.S., D.L.C., T.S.), and Physiology (D.A., M.T.), The University of South Alabama College of Medicine, Mobile, Ala; and the Department of Cell Biology (S.R.G.), The University of Texas at Dallas, Dallas, Tex.