Animals chemistry animal 485 metabolism 264 article 241 nonhuman 240 human 197 Humans 191 controlled study 182 priority journal 149 unclassified drug 141 Article 140 genetics 110 physiology 106 female 100 animal cell 92 drug effects 88 mouse 88 drug effect 83 Mice 82 Female 80 male 77 Male 73 chemical structure 63 animal experiment 60 isolation and purification 55 human cell 52 amino acid sequence 51 rat 50 animal tissue 49