PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6976993-3 1982 We report here that C4 treated with N2H4 or KSCN or frozen-thawed, unlike native C4, forms a complex with C4-binding protein (C4-bp) and is cleaved by C3b/C4b inactivator (I). hydrazine 36-40 complement factor I Homo sapiens 151-170