A Novel Methodology for Stripping and Reprobing of Western Blots Originally Developed with Colorimetric Substrate TMB

Protein blotting is a widely used analytical technique for detection of specific protein(s) in a given sample of tissue or cell homogenate or extract. Both chemiluminescence (CL) and colorimetric detections can be used for imaging protein blots in western blotting. Here we describe a methodology for stripping such western blots, already developed with the colorimetric substrate TMB on nitrocellulose membrane and reprobing the blot (after stripping) for the detection of a second protein through CL. The stripping procedure utilizes a stripping buffer consisting of β-mercaptoethanol, SDS, and Tris-HCl, while washing buffer consists of PBS added with 0.1 % Tween 20 and involves a series of steps facilitating accurate detection of the second protein in the stripped blot through CL.