animal cell controlled study metabolism nonhuman animal 331 Animals 327 priority journal 234 Article 188 mouse 188 Mice 162 animal experiment 154 article 151 protein expression 142 genetics 136 female 134 human 128 unclassified drug 128 Humans 126 physiology 116 animal tissue 113 Female 104 male 98 animal model 94 signal transduction 88 drug effect 86 drug effects 85 cytology 83 Male 80 pathology 74 human cell 72