Staining SDS-Polyacrylamide Gels with Silver Salts

INTRODUCTIONA number of methods have been developed to stain polypeptides with silver salts after separation by SDS-polyacrylamide gel electrophoresis. It is somewhat more difficult to perform than staining with Coomassie Brilliant Blue R-250, but it is ~100-1000-fold more sensitive and is capable of detecting as little as 0.1-1.0 ng of polypeptide in a single band.