Chapter 20, Problem 54RQE

Interpretation Introduction

Interpretation:

The polypeptide Tyr-Gly-His-Phe-Val has to be numbered.

Concept Introduction:

Polypeptides are the ones that contain about $40-50$ amino acids in a chain.  Amino acid units that is present in the polypeptides are known as amino acid residue.  In a linear polypeptide, the end of the chain that has free amino group is known as N-terminal while the end that has free carboxyl group is known as C-terminal.  Numbering of the polypeptide starts from the N-terminal residue.