Form: The kit includes: 1) a blocking serum 2) a diluent solution (for primary antibody and rabbit anti-mouse IgG antibody) 3) a rabbit antibody (shown in red) against mouse Fc portion of IgGs 4) a mouse monoclonal antibody directed against HRP (shown in black) The reagents are provided in lyophilized form to increase the shelf life of the kits. They are also packaged in small aliquots to optimize conditions of use of the reagents.