Abstract

The cytochromes of photosynthetically grown Rhodopseudomonas blastica have been thermodynamically characterized using the technique of redox titrations. Six cytochromes were present; two cytochromes c, Em7= +295mV, Em7=+345mV; and four cytochromes b, Em7=+290mV, Em7=+130mV, Em7=+60mV, Em7=-4mV. These cytochromes were tightly bound except for cytochrome c with Em7 of+345mV which was mostly present in the soluble cell extracts.

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