A procedure is described which allows for rapid detection of cell surface binding or cytoskeleton binding monoclonal antibodies. At the same time this procedure ensures that selected antibodies will be useful in Western blot analysis. This procedure including the cytochemistry and Western blot analysis requires only 100μl of supernatant and can be done directly from the original 96 well plates into which the fusion was plated. One person can easily assay several hundred supernatants in one day for the ability to stain both cells and selected proteins in Western blot analysis.