Caper Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse Application:WP/Immunoprecipitation Western blotting (1:500 – 1:2500) and Immunoprecipitation. HeLa cell lysate can be used as a positive control. However, the optimal concentrations should be determined individually. The antibody recognizes the Caper of human and mouse origins. Reactivity to other species has not been tested.