Chapter 21, Problem 14A

Interpretation Introduction

Interpretation: The secondary structure of protein known as alpha helix needs to be explained. The type of proteins present in it needs to be determined.

Concept Introduction:

The alpha helix (a -helix) is a common element in the secondary structure of proteins and is the right hand-helix confirmation. The group of amino acids has three or four residues along the protein sequence.

Explanation of Solution

In the a helix, the carbon (C = O) of an amino acid binds to the amino H (N-H) of an amino acid, which is four below the chain. Acids. R groups of amino acids stick out of the a helix, where they are free to interact.

The most common types of secondary structures are a helix and plated sheet. The two structures are bonded by hydrogen bonds, which form between the carbonyl O of one amino acid and the other H atom in the amino acid.