Fluorescent staining for proteins on polyacrylamide gels with 5-dimethylamino-1-naphthalenesulfonyl chloride (dansyl chloride)

Multicolored Prestained Standard Protein Marker Generation Using a Variety of Remazol Dyes for Easy Visualization of Protein Bands During SDS-PAGE

Isolation and detection of a specific protein from a complex mixture of proteins using molecular sieves provided by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) is a widely used technique in molecular biology and biochemistry. The detection is achieved usually by running prestained standard markers along with the sample protein mixture. Multicolored standard markers are preferred compared to fluorescent labeled or single colored markers as it allows easy visualization of separation of a specific protein band during SDS-PAGE. In addition, these colored markers show evidence for the transfer of protein bands on the membrane in western blotting technique. This review describes a very simple, inexpensive and easy method of prestaining specific proteins with different colors using a variety of Remazol dyes.

Rapid staining of proteins on polyacrylamide gels and nitrocellulose membranes using a mixture of fluorescent dyes

The present work describes a novel, fluorescence-based method for staining proteins on SDS-PAGE and membrane(s). In this method, proteins are stained using a mixed-dye (sulfo-rhodamine B and 1-anilino-8-naphthalene sulfonic acid (NH(4)(+))) solution. The mixed-dye staining protocol can detect proteins up to a concentration of 15 ng. This method is generally applicable to all proteins and is more sensitive than the conventional Coomassie blue method. The staining method is rapid and efficient. Staining-destaining of proteins using the mixed-dye protocol takes less than half an hour. Another interesting feature of the staining protocol described here is the applicability to the staining of proteins on nitrocellulose membranes.