A1 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse, rat Application:Western blot Western blotting (0.5-4 μg/ml), immunoprecipitation, and Immunohistochemistry. However, the optimal conditions should be determined individually. The A1 antibody detects A1 (Bfl-1) of human, mouse, and rat origins.