RCH1 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human Application:Western blot, Immunoprecipitation Western blotting (1:500 – 1:2000) and Immunoprecipitation. However, the optimal concentrations should be determined individually. HeLa cell lysate can be used as a positive control. The antibody recognizes the RCH1 (KPNA2) of human origin. Reactivity to other species has not been tested.