PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15210651-2 2004 NADPH oxidase is the main source of superoxide in phagocytic and vascular cells, and the p22phox subunit is involved in NADPH oxidase activation. Superoxides 36-46 cytochrome b-245 alpha chain Homo sapiens 89-96