+**A2d** refers to the [Alpha-2 Delta](/wiki/Alpha-2_Delta) auxiliary subunits, integral to voltage-gated calcium channels. These proteins are crucial for regulating [Synaptic Function](/wiki/Synaptic_Function) and modulating neuronal excitability throughout the nervous system.
+## See also
+- [Neuron](/wiki/Neuron)
+- [Nervous System](/wiki/Nervous_System)
+- [Calcium Channel](/wiki/Calcium_Channel)
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