Animals chemistry animal 232 metabolism 124 nonhuman 114 article 111 human 94 Humans 91 controlled study 86 Article 70 priority journal 70 unclassified drug 66 genetics 52 physiology 50 female 49 drug effects 44 animal cell 43 mouse 41 drug effect 40 Female 39 Mice 38 male 37 Male 35 chemical structure 30 animal experiment 28 isolation and purification 27 amino acid sequence 24 human cell 24 in vitro study 24 animal tissue 23