Animals 254 Article animal nonhuman 238 genetics 208 controlled study 198 metabolism 166 priority journal 132 animal cell 106 mouse 106 human 96 Humans 92 animal experiment 88 female 86 male 86 Mice 84 Male 82 animal tissue 78 physiology 78 Female 74 unclassified drug 72 gene expression 64 gene expression regulation 62 drug effects 60 protein expression 54 messenger RNA 48 adult 42 animal model 42 chemistry 40 pathology 38