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|calcium channel, voltage-dependent, P/Q type, alpha 1A subunit|
|Symbol(s):||CACNA1A CACNL1A4, SCA6, MHP1, MHP|
The p-type calcium channel is a type of voltage-dependent calcium channel. Like the others of this class, the α1 subunit is the one that determines most of the channel's properties.
P-type ('P' for purkinje fibers) calcium channels play a similar role to the N-type calcium channel in neurotransmitter release at the presynaptic terminal, but are found in purkinje cells in the electrical conduction system of the heart. Their properties are less well understood.
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