HdmX/MDM4 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human Application:Western blot, Immunoprecipitation Western blotting (1:500 – 1:1500) and Immunoprecipitation. MCF7 cell lysate can be used as a positive control. However, the optimal concentrations should be determined individually. The antibody recognizes the HdmX/MDM4 of human origin. Reactivity to other species has not been tested.