Effect of 1-Methoxy-5-methylphenazinium Methyl Sulfate on Photocurrent Produced by Rhodospirillum rubrum Chromatophores

Abstract
A cathodic photocurrent produced by chromatophores was measured in the presence of 1-methoxy-5-methylphenazinium methyl sulfate (methoxy-PMS). The magnitude of the photocurrent was a function of the wavelength of the incident light, and the photocurrent action spectrum was in agreement with the absorption spectrum of chromatophores. The photocurrent also depended on the concentration of methoxy-PMS or of chromatophores.