Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain. Loosely associated with the inner membrane. Binds 1 heme c group covalently per subunit. The authors placed the amides at positions 10, 24, and 97 by homology with other cytochromes c. There is one amide at position 108 or 111. Belongs to the cytochrome c family. Life shuttle - Issue 76 of November 2006