Animals Humans priority journal unclassified drug nonhuman 107 human 92 controlled study 73 article 71 animal cell 57 Mice 47 protein expression 43 mouse 42 animal 39 human cell 38 metabolism 30 protein function 28 animal experiment 27 signal transduction 25 Female 21 Protein Binding 21 protein protein interaction 21 animal model 20 Article 19 in vitro study 19 chemistry 18 Cell Line 17 review 17 Male 16 Rats 16 Signal Transduction 16