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A sensitive staining method for detecting acidic polysaccharides in cellulose acetate and agarose gels

, : A sensitive staining method for detecting acidic polysaccharides in cellulose acetate and agarose gels. Analytical Biochemistry 130(1): 60-64

A sensitive staining method has been developed for the detection of acidic polysaccharides in cellulose acetate and agarose gels. The method is based on the precipitation of bovine serum albumin by acidic polysaccharides at acidic pH values and the subsequent staining of precipitated protein with amido black or Coomassie brilliant blue R-250 stains. The detection limit of acidic polysaccharides is 15-40 ng on cellulose acetate strips and 50-150 ng on agarose plates. The sensitivity of the described staining technique is of the same order for a wide range of acidic polysaccharides of different origin in contrast to Alcian blue and toluidine blue stains, which detect only mucopolysaccharides of animal origin at comparable levels. The method was also applied to the colorimetric quantitative determination of acidic polysaccharides after electrophoretic separation.


PMID: 6191594

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