PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6286381-3 1982 PAGE studies with a purified membrane complex B2, from which the functional role in transferrin binding and iron uptake has been shown previously, showed that the transferrin receptor is localized on a membrane protein with a mol. Iron 108-112 transferrin Rattus norvegicus 163-174