Signalway Antibody LLC's Histamine H1 Receptor (Phospho-Ser398) Antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Immunofluorescence. The Histamine H1 Receptor (Phospho-Ser398) Antibody was generated using Histamine Receptor H1, and HRH1 as the antigen and it reacts with Human.