Figure Q2-42 Shows a Patch Clamp Recording from the Shaker

question 6

Multiple Choice

Figure Q2-42 shows a patch clamp recording from the Shaker channel (ShB) . What is the presumed molecular mechanism for inactivation of the channel? Figure Q2-42

• A) Several positively charged amino acids in S4
• B) Several negatively charge amino acids in S4
• C) The N-terminal 'ball-and-chain'
• D) A block by Na⁺ ions

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