PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7742148-16 1995 PGD2 inhalation challenges performed a week apart are less reproducible than LTD4 challenges, possibly as a result of significant changes in histamine bronchial responsiveness. Histamine 141-150 prostaglandin D2 synthase Homo sapiens 0-4