enzyme activity protein expression 102 nonhuman 89 controlled study 86 priority journal 74 article 71 Animals 58 unclassified drug 40 mouse 39 animal cell 38 animal experiment 37 animal tissue 32 Mice 29 human 29 Article 27 metabolism 27 Humans 25 signal transduction 24 human cell 22 rat 22 male 21 protein function 21 animal model 20 Female 19 Male 18 Rats 18 Western blotting 18 cell proliferation 18 female 18 animal 17