Which forces are responsible for the stability of alpha-helical structure of proteins.

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Solution

Hydrogen bonding is responsible for the stability of alpha-helical structure of proteins.
The C=O group of an amino acid in the alpha helix forms hydrogen bond with the N-H bond of amino acid four residues later.

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Which forces are responsible for the stability of alpha-helical structure of proteins.

Hydrogen bonding is responsible for the stability of alpha-helical structure of proteins. The C=O group of an amino acid in the alpha helix forms hydrogen bond with the N-H bond of amino acid four residues later.

Hydrogen bonding is responsible for the stability of alpha-helical structure of proteins.
The C=O group of an amino acid in the alpha helix forms hydrogen bond with the N-H bond of amino acid four residues later.