The Rb (4H1) Mouse mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Mouse Monoclonal antibody to RB1. This antibody recognizes Homo Sapiens, Human, Bovine, Non-Human Primate, and Porcine antigen. The Rb (4H1) Mouse mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: EIA, Immunoassay, ELISA, Flow Cytometry, Immunocytochemistry, Immunofluorescence, Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.