PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9070608-1 1997 Expression in the lung of procarcinogen-metabolizing P450 enzymes in the CYP3A subfamily may contribute to the initiation of pulmonary carcinogenesis by agents that require metabolic activation, such as tobacco-derived polycyclic aromatic hydrocarbons. Polycyclic Aromatic Hydrocarbons 219-251 cytochrome P450 family 3 subfamily A member 4 Homo sapiens 73-78