PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
6603573-7	1983	Although the C4a pentapeptide is relatively inactive compared to the C3a pentapeptide, two analogs of these peptides, Leu-Gly-Leu-Gln-Arg and Ala-Gly-Leu-Ala-Arg, each exhibited significantly greater activity than Ala-Gly-Leu-Gln-Arg and each analog desensitized ileal smooth muscle towards contraction by either C3a or C4a.	Leu-Gly-Leu-Gln-Arg	118-137	complement C3	Homo sapiens	313-316