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D1 dopamine receptor-interacting protein (calcyon) This family consists of several D1 dopamine receptor-interacting (calcyon) proteins. D1/D5 dopamine receptors in the basal ganglia, hippocampus, and cerebral cortex modulate motor, reward, and cognitive behaviour. D1-like dopamine receptors likely modulate neocortical and hippocampal neuronal excitability and synaptic function via Ca(2+) as well as cAMP-dependent signaling. Defective calcyon proteins have been implicated in both attention-deficit/hyperactivity disorder (ADHD) and schizophrenia.
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