Chapter 21, Problem 47A

Interpretation Introduction

Interpretation:

The silk protein secondary structure needs to be explained.

Concept introduction:

Protein − proteins are composed of the different types of amino acids and they are bonded together with the help of the peptide bonds.

Based on the arrangement of the amino acids proteins classified into four structures, such as primary, secondary, tertiary and quaternary structure.

Answer to Problem 47A

The silk protein secondary structure is formed by the pleated sheet.

Explanation of Solution

A pleated sheet is formed by the beta-strand. This is also known as a pleated sheet structure. The secondary structure of silk protein is made by a pleated sheet. The secondary structure of proteins is consists of the beta-strands. The structure is represented as follows:

  

Conclusion

It is a complex silk form of proteins. Its beta-strands are formed with hydrogen bonds, and the twisted bonds are converted into a sheet that is termed as a pleated sheet.