PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1716823-1 1991 Mast cells isolated from human gastric mucosa released histamine on challenge with IgE-directed ligands and calcium ionophores but were essentially unresponsive to a variety of non-immunological stimuli. Histamine 55-64 immunoglobulin heavy constant epsilon Homo sapiens 83-86