PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10739244-5 2000 At the same time, the basic amine of the C-3 side chain of the inhibitor interacts with the mostly hydrophobic proximal, S2, and distal, S3, binding sites. Tolonium Chloride 22-27 complement C3 Homo sapiens 41-44