PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18622042-5 2008 In the EC, only 22% of serotonin 5-HT2A-positive neurons were positive for serotonin 5-HT1A receptor-immunoreactivity. ec 7-9 5-hydroxytryptamine receptor 1A Rattus norvegicus 75-100