A-77636 is a synthetic drug which acts as a selective D receptor full agonist.
Giving a more precise explanation of this discrepancy in D receptor has been attempted by a significant minority.
There are a number of ligands selective for the D receptors.
Nonetheless, it continues to be used in scientific research into the function of the D receptor.
At a global level, D receptors have widespread expression throughout the brain.
D receptors have been identified in the atria of rat and human hearts.
It also has a higher affinity for D receptors.
This may be due to the selective antagonist nature of D receptors, though further studies need to be conducted.
Atypical antipsychotic drugs have a similar blocking effect on D receptors.
This suggests that the D receptor may also play an important role in its effects.