gene expression nonhuman 56 article 46 controlled study 42 unclassified drug 34 priority journal 32 Animals 28 Article 26 human 26 genetics 24 Humans 20 metabolism 20 nucleotide sequence 20 Base Sequence 18 Molecular Sequence Data 16 genetic analysis 16 genome 16 protein expression 16 RNA 14 enzyme activity 14 genetic transcription 14 genome analysis 14 messenger RNA 14 Mice 12 gene mutation 12 human cell 12 molecular cloning 12 phenotype 12 Gene Expression 10 Gene Expression Profiling 10