PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 4055743-9 1985 By contrast, 7-ketocholesterol and 20 alpha-hydroxycholesterol strongly inhibited cholesterol 7 alpha-hydroxylase activity at low concentrations (10 microM). 7-ketocholesterol 13-30 cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus 82-113