gene expression unclassified drug controlled study 36 nonhuman 36 promoter region 36 article 34 priority journal 20 Animals 18 Promoter Regions, Genetic 18 metabolism 16 mouse 16 protein expression 16 Mice 14 genetics 14 messenger RNA 14 transcription factor 14 transcription regulation 14 Transcription Factors 12 animal 12 animal cell 12 human 12 Article 10 Gene Expression Regulation, Bacterial 10 Humans 10 bacterial gene 10 genetic transcription 10 human cell 10 protein 10 reverse transcription polymerase chain reaction 10 transcription initiation 10