PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 606442-4 1977 This enzyme was shown further to activate the C3b feedback cycle as shown by its ability to consume factor B in serum and the reduction in the extent of complement consumption in the presence of EDTA. Edetic Acid 195-199 complement C3 Homo sapiens 46-49