1. From the Research Laboratory for Biochemical Pathology (S.C., Q.C., T.L., L.W.), Electron Microscopy and Stereological Research Laboratory (J.R.N.), and the Department of Clinical Biochemistry (L.M.R.), Aarhus University Hospital, Denmark; the Institute of Anatomy (C.C.D.) and the Institute of Molecular and Structural Biology (P.H.), University of Aarhus, Denmark; and The Burnham Institute (Y.Y.), La Jolla, Calif.