controlled study protein expression nonhuman 244 priority journal 224 Animals 210 article 208 metabolism 168 Humans 166 animal cell 164 genetics 158 human 148 mouse 140 Mice 128 animal 126 unclassified drug 120 animal experiment 102 Article 96 human cell 96 Female 80 female 80 messenger RNA 80 protein function 78 signal transduction 76 animal model 74 animal tissue 72 male 72 gene expression 70 cell proliferation 68 Cell Line 66 cell line 64