PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2854108-1 1988 Histamine (HA) is synthesized from L-histidine by histidine decarboxylase (HDC), and HA released from neurons is predominantly methylated to tele-methylhistamine (t-MH), which is further metabolized by MAO. Histidine 35-46 histidine decarboxylase Rattus norvegicus 75-78