BLM Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human Application:Western blot, Immunoprecipitation Western blotting (1:300 – 1:3000) and Immunoprecipitation. 293T cell lysate can be used as a positive control. However, the optimal concentrations should be determined individually. The antibody recognizes the BLM of human origin. Reactivity to other species has not been tested.