function:In peripheral tissues, the H1 subclass of histamine receptors mediates the contraction of smooth muscles, increase in capillary permeability due to contraction of terminal venules, and catecholamine release from adrenal medulla, as well as mediating neurotransmission in the central nervous system.,PTM:Potential sites of phosphorylation in the third cytoplasmic loop may play an important role in regulating signal transduction through the receptor molecule.,similarity:Belongs to the G-protein coupled receptor 1 family.,
Cell membrane ; Multi-pass membrane protein .
Lens epithelium,Lung,
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