metabolism priority journal nonhuman 658 controlled study 588 animal 520 Animals 496 Article 420 article 362 human 349 Humans 335 genetics 324 animal cell 291 unclassified drug 286 physiology 261 mouse 251 animal experiment 239 female 239 Mice 211 chemistry 211 animal tissue 205 protein expression 205 Female 198 signal transduction 196 male 188 drug effect 165 Male 164 human cell 147 drug effects 139 enzyme activity 135 Signal Transduction 128