The succinate dehydrogenase consists of only four subunits, all nuclearly encoded, and is part of both the respiratory chain and the Krebs cycle.
encephalomyopathy
optic atrophy
tumor
References
Rustin P, Rotig A. Inborn errors of complex II--unusual human mitochondrial diseases. Biochim Biophys Acta. 2002 Jan 17;1553(1-2):117-22. PMID: #11803021#