ProAct Membrane Stain, for the detection of proteins on nitrocellulose or PVDF membranes, is as sensitive as Ponceau S and provides fast results. The ready-to-use stain confirms transfer prior to Western blotting. It contains no harmful solvents and is completely reversible — de-stain with distilled water in as little as 2 min. Protein bands are stained instantly, results are useful for photography. AMRESCO Inc.,800-448-4442 www.amresco-inc.com