PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9196269-10 1997 Histamine and (R)-alpha-methylhistamine, a selective histamine H3 receptor agonist, produced a moderate contractile effect on the resting tone of preparations. Histamine 0-9 histamine receptor H3 Bos taurus 53-74