PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2431677-5 1986 Both histamine and Zn2+, two ingredients of mast-cell granules, strongly inhibit DPP II at concentrations reported to occur in the granules. Histamine 5-14 dipeptidylpeptidase 7 Rattus norvegicus 81-87