[Electron transport chain of the Candida mycoderma mutant lacking cytochromes b and a+a3]

Two electrontransport chains--"oxygen" and "peroxidase"--were found to operate in the mutant of Candida mycoderma lacking cytochromes b and a+a3; the terminal acceptors of electrons are oxygen and hydrogen peroxide, respectively. The "oxygen" chain lacks cytochromes but contains pyridine nucleotides and flavoproteins; it is inhibited by rotenone and benzhydroxamic acid. The "peroxidase" chain consists of pyridine nucleotides, cytochrome c, and cytochrome c peroxidase; it is inhibited by cyanide.