Predicted to enable G protein-coupled amine receptor activity; heterocyclic compound binding activity; and neurotransmitter receptor activity. Acts upstream of or within several processes, including gastric acid secretion; learning or memory; and toxin transport. Predicted to be located in membrane. Predicted to be active in dendrite. Predicted to be integral component of plasma membrane. Is expressed in brain; early conceptus; stomach; and uterus. Orthologous to human HRH2 (histamine receptor H2). [provided by Alliance of Genome Resources, Apr 2022]