Biophysical Journal 43: 47-51 (1983)
© 1983 the Biophysical Society

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Photoelectric signals from dried oriented purple membranes of Halobacterium halobium.

ABSTRACT

In dried oriented samples of purple membrane isolated from Halobacterium halobium, the photoelectric activity decreases and the light adaptation vanishes when the water content of the sample is lowered. In the photocycle the first steps of the proton movement were accelerated with decreasing humidity, while the last steps of the photocycle could not be observed. From the analysis of the photoelectric signal we conclude that at low humidities the protons move forward in the L decay and return to their original place during M decay.

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