MyBioSource.com's Phospho-MAP2K1-pS221 Polyclonal Antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Western Blot. The Phospho-MAP2K1-pS221 Polyclonal Antibody was generated using Map2k1, and MKK1 as the antigen and it reacts with Human, Mouse, and Rat.