Humans article nonhuman protein expression unclassified drug Animals 65 priority journal 63 human 58 controlled study 56 animal cell 55 Mice 50 mouse 45 human cell 40 protein function 28 animal experiment 25 animal model 23 Female 22 female 20 Protein Binding 19 nucleotide sequence 17 Cell Line 16 Male 16 protein binding 16 signal transduction 16 Molecular Sequence Data 15 cell proliferation 15 metabolism 15 in vitro study 14 animal 13 enzyme activity 13