human 163 human cell nonhuman protein expression controlled study 152 Animals 123 animal cell 123 Humans 122 priority journal 116 article 114 mouse 100 animal experiment 84 Mice 81 unclassified drug 74 animal model 67 female 57 male 57 in vivo study 47 Article 46 Female 45 cell proliferation 45 metabolism 45 animal 43 in vitro study 42 Cell Line, Tumor 40 animal tissue 39 signal transduction 39 Male 38 protein function 38 apoptosis 34