PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 690134-21 1978 Removal of the COOH-terminal arginyl residue from C5a reduces chemotactic activity; therefore, the terminal portion of this molecule appears to play an active role in stimulating leukocyte migration. arginyl 29-36 complement C5a receptor 1 Homo sapiens 50-53