Structure of bonito heart ferricytochrome c and some remarks on molecular interaction in its crystalline state.

The structure analysis of bonito heart ferricytochrome c was carried out at 2.8 A resolution by X-ray diffraction. The overall features of the molecule are virtually identical with those of bonito ferrocytochromes c and other cytochromes c. In the present work, the modes of molecular packing among cytochromes c were also compared by means of intermolecular distance maps. Some differences in the structures of ferro- and ferricytochrome c may exist on the surface of the molecules.