Mitochondrial α-ketoglutarate dehydrogenase abnormality in Alzheimer disease fibroblasts: ∗K.-F.R. Sheu, +A.J.L. Cooper, ∗G. Ali, ∗J.P. Blass and #J.G. Lindsay ∗Burke Med Res Inst, Cornell Univ Med College, White Plains, NY 10605, USA; Depts of ∗Neurology and +Dept of Biochemistry, Cornell Univ Med College, New York, NY 10021, USA; and #Dept of Biochemistry, Univ of Glasgow, Glasgow G128QQ UK