The HRH4 Rabbit pAb (APR17783N) Antibody from Leading Biology is a Rabbit Polyclonal antibody to Histamine Receptor H4, and HRH4. This antibody recognizes Human, Mouse, and Rat antigen. The HRH4 Rabbit pAb (APR17783N) Antibody has been shown to work in the following applications: Western Blot.