Type | MGI:General | Description | brains exhibit dopamine levels at approximately 1.5% of wildtype levels midbrain neuron cultures show a major reduction in dopamine release and no exoctytotic release of dopamine from synaptic vesicles in response to depolarization for 2 min with elevated potassium midbrain neuron cultures release only about 35% as much dopamine in response to amphetamine than in wildtype |