animal metabolism nonhuman Animals 373 controlled study 294 priority journal 235 Article 211 animal cell 188 animal experiment 176 mouse 165 article 154 animal tissue 145 physiology 144 Mice 139 female 132 genetics 131 unclassified drug 126 human 121 male 118 Humans 114 Female 108 Male 101 protein expression 100 drug effects 90 animal model 80 drug effect 79 rat 76 chemistry 75 signal transduction 73 Rats 63