PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21526428-1 2011 In mammals, steroid hormones are synthesized from cholesterol that is metabolized by the mitochondrial CYP11A1 system leading to pregnenolone. Steroids 12-28 cytochrome P450 family 11 subfamily A member 1 Homo sapiens 103-110