PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9914152-6 1999 For this study, the fluorescent sterol cholestatrienol (C-3) was incorporated into platelet membranes by exchange from cholesterol-containing phosphatidylcholine small unilamellar vesicles. sterol cholestatrienol 32-54 complement C3 Homo sapiens 56-59