article human metabolism Humans 279 controlled study 171 animal 140 priority journal 139 Animals 128 human cell 125 genetics 118 nonhuman 111 physiology 105 female 97 chemistry 95 unclassified drug 85 Female 82 signal transduction 77 protein expression 75 drug effect 69 mouse 69 animal cell 68 Mice 67 cell line 59 Cell Line 56 cell culture 53 male 53 Signal Transduction 48 protein binding 46 Male 45 biosynthesis 43