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Anal Biochem. 1988 Aug 15;173(1):201-5.

Coomassie blue-sodium dodecyl sulfate-polyacrylamide gel electrophoresis for direct visualization of polypeptides during electrophoresis.

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Institut für Physikalische Biochemie der Universität München, Federal Republic of Germany.


A method for the direct visualization of Coomassie blue-stained polypeptide bands during electrophoresis with subsequent elution of polypeptides and removal of sodium dodecyl sulfate (SDS) and Coomassie blue is described. Primarily it is intended as a means for easy and--because there is no protein fixation step--nearly quantitative recovery of separated polypeptides for amino acid sequencing. It may also be used to obtain rapid information about the protein patterns during a run. Together with our new high resolution SDS-polyacrylamide gel electrophoresis system for small proteins and polypeptides (H. Schägger and G. Von Jagow (1987) Anal. Biochem. 166, 368-379) the method described allows the preparative separation of protein fragments as even protein fragments between 1 and 3.5 kDa are easily detected.

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