nonhuman protein expression controlled study 244 Animals 236 priority journal 228 article 208 animal cell 186 mouse 152 Mice 146 metabolism 140 genetics 136 Humans 128 animal 128 unclassified drug 118 human 116 animal experiment 108 Article 80 protein function 80 animal model 78 animal tissue 76 Female 68 female 68 male 68 signal transduction 68 gene expression 66 messenger RNA 66 cell proliferation 60 genetic transfection 60 human cell 60 Male 56