The nuclear-coded subunits of yeast cytochrome c oxidase. I. Fractionation of the holoenzyme into chemically pure polypeptides and the identification of two new subunits using solvent extraction and reversed phase high performance liquid chromatography.


Previously, cytochrome c oxidase from the yeast Saccharomyces cerevisiae has been thought to be composed of seven different polypeptide subunits. Four of these are small polypeptides (4,000-15,000 daltons), subunits IV-VII, which are encoded by nuclear DNA. Studies described here reveal the presence of two new polypeptides in this size range. These… (More)


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