biosynthesis 549 article 500 metabolism 368 nonhuman 309 priority journal 240 animal 238 Animals 231 controlled study 225 genetics 135 unclassified drug 126 human 122 enzymology 112 Humans 106 physiology 106 rat 103 Rats 99 drug effect 99 animal cell 98 Male 94 Support, Non-U.S. Gov't 93 Animal 92 male 90 chemistry 85 Article 84 mouse 76 Female 75 Mice 74 Biosynthesis 70 female 69 gene expression regulation 69