Preparation of crystalline Pseudomonas cytochrome c-551 and its general properties

A simple method has already been devised for extensive purification of four respiratory com- ponents from P8eudomona8 aerugino8a in a true water-soluble state without the aid of detergents (Horio, 1958a). These components were called P8eudomona8 (P)-cytochrome-554, P-cytochrome- 551, P-blue protein and P-cytochrome oxidase (Horio, 1958b; Horio, Higashi, Matsubara et al. 1958). The same micro-organism also contains another cytochrome, P-cytochrome-560, which is similar to the so-called cytochrome b, and which has