An evaluation of a number of commercial reactive textile dyes with regard to suitability for staining of proteins prior to polyacrylamide gel electrophoresis showed that a blue dye containing a difluorochloropyrimidyl group gave excellent quantitation. The sensitivity was as good as with other dyes suggested for the same purpose. Reaction conditions have been optimized to reach completion in 3 hr at 40°C. A simple device for slicing gels is described. The main errors responsible for experimental scatter are briefly discussed. © 1977.
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