PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 31256164-9 2019 RESULTS: We observed significantly decreased CYP21A2 activity in both in vitro testing systems after treatment with efavirenz at therapeutic concentrations. efavirenz 116-125 cytochrome P450 family 21 subfamily A member 2 Homo sapiens 45-52