MMP-9 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse, rat Application:Western blot Western blotting (0.5-4 μg/ml). However, the optimal concentrations should be determined individually. The antibody recognizes the full length (proenzyme, 92 kDa) and cleaved (active enzyme, 84 kDa) MMP-9 in samples from human, mouse, and rat origins.