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|Title||The Direction of Ligh-induced pH Changes of Bacteriorhodopsin in Purple Membrance and Fragments At Different pH's And Temperatures|
During this work, the effect of pH on the phetoaetivity of bacteriorhodopsin in purpie membrane fragments has been studied under continuous high light intensity. The activity of bacteriorhodopsin at acidic pH was found to be more sensitive to temperature changes than it was at neutral or higher pH values. At iow pH and room temperature, bacteriorhodopsin in purple membrane fragments aeiciiﬁes its medium in agreements with the order of events near neutral or higher pH values and room temperature and disagreement with its activity at acidic and lower temperature values. On the other hand, at room temperature and phjrsiologicai pi-I, this study is compatible with the fact that one hydrogen ion is transported across the purple membrane per one bacteriorhodopsin photocycied. Beyond these conditions the behavior of bacteriorhodopsin becomes much more complex.
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