genetics metabolism priority journal nonhuman 261 controlled study 243 animal 184 Animals 182 Article 158 article 148 human 139 Humans 129 unclassified drug 121 animal cell 112 mouse 107 Mice 97 protein expression 97 female 91 gene expression 88 gene expression regulation 88 physiology 84 animal experiment 78 messenger RNA 78 Female 76 signal transduction 76 chemistry 75 protein function 71 animal tissue 69 male 68 Male 62 human cell 61