title: Mixed-dye staining method for protein detection in polyacrylamide gel electrophoresis using calconcarboxylic acid and rhodamine B.
abstract: We have developed a new mixed-dye protein staining method that is simple, rapid, and sensitive. A freshly prepared mixture of calconcarboxylic acid (NN, 0.02%) and rhodamine B (RB, 0.04%) in 40% methanol/7% acetic acid, was used as a staining solution. RB acts as an auxiliary agent to inhibit the binding of NN to the gel matrix, reducing the background staining and therefore enhancing the protein staining by NN. This mixed-dye staining method reduces the total staining and destaining time to less than an hour, and increases the sensitivity to 25 ng of bovine serum albumin, which is greater than the 100 ng sensitivity limit of Coomassie Brilliant Blue R-250 (CBBR) staining.
authors.affiliation: College of Pharmacy, Chonnam National University, Kwangju, Korea.
authors.forename: D W
authors.initials: DW
authors.lastname: Jung
authors.forename: G S
authors.initials: GS
authors.lastname: Yoo
authors.forename: J K
authors.initials: JK
authors.lastname: Choi
mesh_terms: D001391:Azo Compounds; D002256:Carbonic Anhydrases / Q000032:analysis; D004396:Coloring Agents; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods*; D005456:Fluorescent Dyes; D009218:Myosins / Q000032:analysis; D009284:Naphthols; D010047:Ovalbumin / Q000032:analysis; D010763:Phosphorylase b / Q000032:analysis; D011506:Proteins / Q000032:analysis*; D012235:Rhodamines; D012710:Serum Albumin, Bovine / Q000032:analysis; D013194:Staining and Labeling / Q000379:methods*; D001616:beta-Galactosidase / Q000032:analysis
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D005456:Fluorescent Dyes; D009284:Naphthols; D011506:Proteins; D012235:Rhodamines; D012710:Serum Albumin, Bovine; C084567:calconcarboxylic acid; D010047:Ovalbumin; D010763:Phosphorylase b; D001616:beta-Galactosidase; D009218:Myosins; D002256:Carbonic Anhydrases; C029773:rhodamine B