[Composition and content of cytochromes in Rhodopseudomonas palustris in relation to growth conditions]

Differential spectra, CO spectra and spectra of hemochromes were studied in the cells of Rhodopseudomonas palustris grown in aerobic conditions in the light and in the darkness; the terminal oxidase was cytochrome a. This cytochrome was not detected in the cells cultivated in anaerobic conditions in the light. The content of cytochromes b was higher in the cells grown in aerobic conditions in the darkness; the content of cytochromes c was higher in the cells cultivated in anaerobic conditions in the light.