since a number of recent dopamine receptor distribution studies have indicated a preponderance of d1 compared to d2 dopamine receptor subtypes within the snpr , we examined the relative behavioral functions of these two subtypes within the nigra by studying rotation following unilateral , local injections of a d1 ( skf38393 ) and d2 ( quinpirole ) agonist , significant , dose-dependent contralateral rotation was observed following injections of r , s-skf38393 .
C0034798
dopamine receptor
C0058698
d2 dopamine receptor