Animals controlled study messenger RNA protein expression 140 nonhuman 136 article 114 animal cell 100 priority journal 94 animal experiment 80 RNA, Messenger 74 animal tissue 72 Mice 68 mouse 68 animal 64 Male 60 metabolism 60 male 58 Female 56 unclassified drug 56 Rats 52 female 50 rat 50 genetics 42 Humans 40 human 40 protein function 40 signal transduction 36 Gene Expression Regulation 34 gene expression 32 Article 30