article protein expression controlled study 751 nonhuman 748 priority journal 734 Animals 620 animal cell 420 human 348 Mice 340 animal experiment 336 Humans 334 mouse 333 unclassified drug 304 animal tissue 276 female 273 Female 264 human cell 255 protein function 219 male 215 animal model 198 Male 185 rat 176 signal transduction 174 messenger RNA 168 Rats 160 enzyme activity 156 cell proliferation 149 metabolism 143 Western blotting 131 apoptosis 126