1. From INSERM U-466 and Biochimie IFR-31 (F.R., N.A., C.V., A.-V.C., A.N.-S., R.S.), Faculty of Medicine, University Paul Sabatier, Toulouse, France; INSERM U-563 (R.B.), Centre de Physiopathologie de Toulouse-Purpan, Department Lipoproteines et Mediateurs Lipidiques, IFR-30, Toulouse, France.