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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Definitions:

Cyanohydrin

Organic compounds with a nitrile and a hydroxyl functional group attached to the same carbon atom.

Aldehyde

An organic compound characterized by the presence of a carbonyl group bonded to at least one hydrogen atom.

Conversion

The process of changing something from one form to another, often used in chemistry to describe the transformation of substances.

Reaction

A process in which one or more substances are changed into one or more different substances through the reorganization of molecular or ionic structure.