biosynthesis metabolism article 253 animal 164 nonhuman 108 Animals 102 controlled study 101 genetics 99 enzymology 81 priority journal 81 human 75 drug effect 73 physiology 73 chemistry 72 Support, Non-U.S. Gov't 64 Animal 62 Humans 62 Article 56 rat 55 unclassified drug 54 Rats 53 male 50 Male 48 female 48 animal cell 47 gene expression regulation 47 mouse 45 Female 44 kinetics 43 growth, development and aging 42