M4 and M9 antibodies in the overlap syndrome of primary biliary cirrhosis and chronic active hepatitis: Epitopes or epiphenomena?
Paul A. Davis, Patrick Leung, Michael Manns, Marshall Kaplan, Santiago J. Munoz, Frederic A. Gorin, E. Rolland Dickson, Edward Krawitt, Ross Coppel, M. Eric Gershwin – 1 November 1992 – Before the identification of the major mitochondrial antigens of primary biliary cirrhosis as components of the 2‐oxo‐acid dehydrogenase enzyme family, mitochondrial autoantigens were believed to be extremely heterogeneous and were divided into nine subtypes termed M1 to M9.