Extraction and rapid inactivation of proteins from Saccharomyces cerevisiae by trichloroacetic acid precipitation

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Abstract
Methods currently used for the extraction of proteins from yeast involve relatively long time periods between sampling cells from a culture and analysis of their proteins by polyacrylamide gel electrophoresis–sodium dodecylsulphate. Often it is desirable to inactivate cellular metabolism rapidly after sampling and here we show that trichloroacetic acid precipitation techniques, often used for rapid extraction and inactivation of proteins from higher eukaryotes, can be adapted for use with organisms which have cell walls.