Coomassie® Brilliant Blue R 250 is a sensitive triphenylmethane dye for protein detection in polyacrylamide gels. It may be combined with other stains, such as silver stain, to distinguish different types of proteins.Corresponds to SERVA Blue R (cat. no. 35051). Coomassie® Brilliant Blue R 250 is a sensitive triphenylmethane dye for protein detection in polyacrylamide gels. It may be combined with other stains, such as silver stain, to distinguish different types of proteins.Corresponds to SERVA Blue R (cat. no. 35051).