1 aminomethyl 5,6 dihydroxy 3 phenylisochroman 6 chloro 2,3,4,5 tetrahydro 7,8 dihydroxy 3 methyl 1 (3 methylphenyl) 1h 3 benzazepine Animals Behavioural phenotype D 3 knockout D2 knockout Dopamine Agonists Dopamine receptors Face Female Male Mice Mice, Congenic Mice, Inbred C57BL Mice, Knockout Movement Mutation Orofacial movements Phenotype Receptors, Dopamine D1 Receptors, Dopamine D2 Receptors, Dopamine D3 animal behavior animal experiment article controlled study dopamine 1 receptor dopamine 2 receptor dopamine 3 receptor dopaminergic system