Calcium Channels Potassium Channels Sodium Channels |
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Voltage gated Na+ channel: α-subunit 4 repeated domains. Each domain has 6 membrane spanning subunits. Subunit 4 acts as a voltage sensor. |
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Non-Voltage gated Na+ channel Each subunit has 2 membrane spanning subunits. The channel is a heterotrimer. |
![]() CTX: Charybdotoxin Ball & chain: Inactivation domain From: Goldstein |
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Voltage-gated Shaker K+ channel |
Inwardly rectifying K+ channel |
Voltage gated Ca++ channel |
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![]() From Queens University |
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Excitation-Contraction Coupling: Muscle |
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