protein expression controlled study 128 nonhuman 125 priority journal 115 Animals 101 article 100 Humans 88 human 83 metabolism 80 genetics 79 animal cell 73 mouse 63 unclassified drug 63 Mice 59 animal 57 Article 52 human cell 49 animal experiment 45 Female 41 female 41 protein function 41 signal transduction 37 gene expression 36 male 35 messenger RNA 35 animal model 32 animal tissue 31 gene expression regulation 31 genetic transfection 31 cell proliferation 30