Sequence homologies and structural similarities between the polypeptides of yeast and beef heart cytochromecoxidase

Abstract
The homologous polypeptides in yeast and beef heart cytochrome c oxidase have been identified by sequence comparisons and structural similarities. The properties of individual polypeptides have been used to specify which components are extrinsic, and which intrinsic and bilayer spanning, in the cytochrome c oxidase complex.