Abstract

The suitability of Deriphat-polyacrylamide gel electrophoresis as a method for separating purple bacterial pigment-protein complexes has been tested. When appropriate non-denaturing detergents are used to solubilize chromatophores, this method provides a rapid, easy and microscale procedure for analyzing the composition of the bacterial photosynthetic apparatus with minimal disruption of individual pigment-proteins. Its usefulness is further illustrated by employing it to test for suitable detergents with which to solubilize purple bacterial chromatophores, and as an assay to study variation in the composition of the photosynthetic unit of bacterial cultures grown under different conditions.

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