1. From the Department of Medical Biochemistry and Immunology (M.J.C., B.C., O.R.E.W., V.B.O.), University of Wales College of Medicine, Heath Park, Cardiff, Wales; Department of Biochemistry (G.E.J.), University of Cambridge, Tennis Court Road, Cambridge; and the Cardiovascular Research Group (J.M.G., N.E.B.), University of Reading, Whiteknights, Reading, UK.