PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16475710-1 2006 The oxazaphosphorines cyclophosphamide (CP) and ifosfamide (IF) are alkylating agents that require bioactivation via cytochrome (CYP) P450 isoenzymes including CYP2C9 enzymes. oxazaphosphorines 4-21 cytochrome P450 family 2 subfamily C member 9 Homo sapiens 160-166