SEK1/MKK4/JKK1 Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse, dog Application:Western blot Western blotting (0.5-4 μg/ml). However, the optimal concentrations should be determined individually. The antibody recognizes unphosphorylated and phosphorylated SEK1 from samples of human, mouse, and dog origins.