Which Factor Contributes to the Selectivity Pore of the Potassium $\alpha$

question 51

Multiple Choice

Which factor contributes to the selectivity pore of the potassium channel from S. lividans?

• A) backbone carbonyl groups in irregular secondary structures
• B) negatively charged amino acids near the channel opening
• C) the N-terminal ends of 4 \(\alpha\) helices
• D) both backbone carbonyl groups in irregular secondary structures and negatively charged amino acids near the channel opening
• E) both backbone carbonyl groups in irregular secondary structures and the N-terminal ends of 4\(\alpha\)helices

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