Structure and Nucleotide Sequence of the Cytochrome B Gene in Yeast Mitochondrial DNA
The mitochondrial respiratory chain contains two distinct cytochromes of the b type (bk and bt). Cytochromes bk and bt differ in their redox potentials and absorption properties in the visible spectrum (Table 1). Both cytochromes are part of the coenzyme QH2-cytochrome c reductase and have been implicated to function on the main pathway of the electron transport chain (Rieske, 1976). Despite the fact that cytochrome b has been isolated from fungal (Weiss and Ziganke, 1974) and mammalian (VonJagow et al., 1978) sources, the relationship of the purified protein to cytochromes bk and bt has not been satisfactorily resolved and until recently it was not clear whether they represent two different or a single heme protein.
KeywordsChrome Polypeptide Suspen Oligomycin Hydroxylapatite
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