PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19867902-7 1915 According to the work of Nef, the group of substances under discussion has the property of dissociating to yield a halogen acid and an unsaturated alkylidene rest. halogen acid 115-127 S100 calcium binding protein B Homo sapiens 25-28