article 1,047 nonhuman 1,040 priority journal 908 Animals 837 controlled study 832 gene expression 740 metabolism 561 gene expression regulation 560 genetics 522 human 474 Humans 454 unclassified drug 422 protein expression 405 animal cell 384 mouse 372 Mice 363 animal 354 animal experiment 326 messenger RNA 324 Female 300 Gene Expression Regulation 300 female 285 animal tissue 272 signal transduction 264 Article 256 physiology 243 male 239 human cell 231 Male 230 RNA, Messenger 222