Abstract
This review covers the following subjects cytochrome-a, cytochrome-c, cytochrome-b2, cytochrome-b5, cytochrome-b, cyto-chrome-c1, lipids, succinic dehydrogenase, pyridine nucleotides, oxidative phosphorylation, peroxidase, catalase, glutamic dehydrogenases, [alpha]-ketoglutarate, xanthine oxidase and amino acid oxidase.