Animals Humans unclassified drug nonhuman 388 human 354 article 280 controlled study 276 priority journal 272 animal cell 194 animal 180 human cell 178 Mice 172 mouse 154 protein expression 142 metabolism 138 protein function 92 animal experiment 90 chemistry 90 Cell Line 80 Article 76 signal transduction 72 Female 70 in vitro study 70 animal model 68 Protein Binding 64 Cercopithecus aethiops 62 messenger RNA 62 female 60 genetics 60 in vivo study 60