Chapter 20.4, Problem 1QQ

Interpretation Introduction

Interpretation: The correct statement about the handedness of standard amino acids found in proteins has to be stated.

Concept introduction: Proteins are the biomolecules that are composed of long chain of amino acid residues.  The amino acids present in the proteins are called standard amino acids.

Handedness is a form of isomerism.  Many molecules, including the carbohydrates, amino acids possess this property.  Those molecules that possess this property exist either in right-handed form or left-handed form.  These are related to each other in a similar way as the pair of hands.  These forms are mirror images of each other.