FOXP3 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse Application:Western blot Western blotting (0.5-4 μg/ml). However, the optimal concentrations should be determined individually. The antibody recognizes ~52 kDa FOXP3 from samples of human, mouse and rat origins. Mouse small intestine and rat kidney tissue lysates can be used as positive controls.