Abstract

Light-induced pH changes with chromatophores from Rhodospirillum rubrum have been studied as a function of pH, chromatophore and salt concentrations, and light intensity. Optimal reaction conditions have been determined. It has been demonstrated that light-induced pH changes may also be obtained at high light intensities by addition of phenzaine methosulfate after a lag period in a system inhibited by 2- n-heptyl-4-hydroxyquinoline- N-oxide.

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