Animals 70 Female Mice Mice, Inbred C57BL controlled study mouse nonhuman 68 priority journal 63 article 60 female 59 animal experiment 57 animal model 41 animal tissue 37 protein expression 35 animal cell 34 Male 32 Mice, Knockout 26 unclassified drug 24 male 23 signal transduction 20 C57BL mouse 18 Humans 18 animal 18 human 18 metabolism 18 Mice, Inbred BALB C 16 Mus 15 Receptors, Dopamine D2 15 dopamine 2 receptor 15 protein function 14