Animals animal cell article nonhuman 364 protein expression controlled study 318 priority journal 289 Mice 234 mouse 212 animal experiment 154 Female 124 unclassified drug 124 Humans 119 animal tissue 118 female 117 animal model 108 human 102 messenger RNA 89 Rats 84 animal 84 male 83 rat 83 human cell 82 protein function 81 signal transduction 81 Male 80 metabolism 75 Mice, Inbred BALB C 74 cell proliferation 68 RNA, Messenger 66