Animals metabolism protein expression animal 236 nonhuman 217 controlled study 203 animal cell 141 priority journal 136 mouse 131 Mice 121 Article 118 animal experiment 113 human 111 Humans 105 article 100 genetics 95 unclassified drug 95 female 89 Female 81 physiology 79 animal tissue 78 male 72 protein function 72 Male 70 animal model 70 signal transduction 70 drug effects 61 Western blotting 57 messenger RNA 57 pathology 56