PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8383168-8 1993 PAF also stimulated superoxide anion production alone and in combination with the macrophage activator 12-O-tetradecanoyl-phorbol-13-acetate (TPA) in both cell types. Superoxides 20-36 PCNA clamp associated factor Homo sapiens 0-3