HER2/ErbB2 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human mouse Application:Western blot Western blotting (1:500 – 1:2000). However, the optimal concentrations should be determined individually. HeLa cell lysate can be used as a positive control. The antibody recognizes the ErbB2 of human and mouse origin. Reactivity to other species has not been tested.