PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2839363-2 1988 The extracellular Ca2+ is required for the O2- production of neutrophils stimulated by C5a, but is only partially required for those by immune complex. Superoxides 43-45 complement C5a receptor 1 Homo sapiens 87-90