description
Histamine is a biogenic amine involved in local immune responses, regulation of gut function and neurotransmission. It exerts its actions by binding to histamine receptors. There are four receptors in humans, H1-H4 (Hill SJ et al, 1997)

external resources
NCBI:1269557
REACTOME:R-HSA-390650
PUBMED:9311023

genes
HRH1 , HRH2 , HRH3 , HRH4 ,