PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1915737-4 1991 Our hypothesis is that abnormal iron handling by the transferrin receptor may contribute to the formation of free radical species which catalyze the lipid peroxidation of nigral cell membranes. radical 114-121 transferrin receptor Mus musculus 53-73