PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9698292-5 1998 Of the recombinant P450 isoforms tested, only CYP2B6 and CYP2C9 formed nirvanol from (S)-MP. ethylphenylhydantoin 71-79 cytochrome P450 family 2 subfamily B member 6 Homo sapiens 46-52 9698292-9 1998 Therefore, the N-demethylation of (S)-MP to nirvanol may be a useful means of probing the activity of CYP2B6 in vitro when concentrations of >1000 microM are used, but it is unlikely to be a suitable phenotyping tool for this isoform in vivo, where concentrations of >1000 microM are rarely encountered. ethylphenylhydantoin 44-52 cytochrome P450 family 2 subfamily B member 6 Homo sapiens 102-108