article metabolism nonhuman animal 343 controlled study 322 Animals 314 priority journal 286 animal cell 206 physiology 172 genetics 170 unclassified drug 156 animal experiment 148 mouse 146 Mice 136 drug effect 127 animal tissue 117 female 116 human 111 chemistry 108 Humans 106 protein expression 102 rat 101 Female 100 Rats 95 enzyme activity 91 male 91 Male 81 signal transduction 77 enzymology 73 Animalia 72