NCIt definition : Human DRD5 wild-type allele is located in the vicinity of 4p16.1 and is approximately
2 kb in length. This allele, which encodes D(1B) dopamine receptor protein, plays
a role in the stimulation of adenylate cyclase activity and intracellular accumulation
of cAMP. Defects in DRD5 are a cause of blepharospasm, a primary focal dystonia affecting
the orbicularis oculi muscles.;