PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 30450838-6 2019 Mechanistically, GCH1 overexpression increased BH4, nitric oxide and hydrogen peroxide, and these changes were associated with increased release of histamine and serotonin and degranulation of mast cells. Histamine 148-157 GTP cyclohydrolase 1 Mus musculus 17-21