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Updated: May 23, 2026

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Staining of Proteins in Gels with Coomassie G-250 without Organic Solvent and Acetic Acid
Published on: August 14, 2009
Staining membrane-bound proteins with coomassie blue r250
CSH Protocols
|April 10, 2012
Abstract:
INTRODUCTIONCoomassie Blue R250 permanently stains membrane-bound proteins and is compatible with PVDF and nitrocellulose membranes, but it is incompatible with nylon membranes. This technique is relatively insensitive, with a detection limit of ~1.5 μg of protein. One drawback of Coomassie Blue staining is that it produces a high background that can make interpretation of results difficult.
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A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...

