United States Biological's Pab Rb x human CRK, phosphorylated (Y221) antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Western Blot. The Pab Rb x human CRK, phosphorylated (Y221) antibody was generated using CRK as the antigen and it reacts with Homo Sapiens, Human, Mouse, and Rat.