How do D amino acids differ from L amino acids?

Amino acids are the organic compounds that contain amine (NH₂) group and carboxylic (COOH) groups, in addition to hydrogen and R group.

This R group is unique for every amino acid and is the reason we can differentiate among the amino acids.

Talking about the structure of amino acid, the two groups amine (NH₂) and carboxyl (COOH) are connected by a single carbon atom. This carbon atom is called chiral carbon.

Amino acids have the ability to form stereoisomers that surround this particular chiral carbon. This divides the amino acids into two types of isomers, Amino Acid D and Amino Acid L.

The main difference between L and D isomers(dl to l & l to dl) lies in the form of the structure of these stereoisomers. Let’s see it in detail.

L amino acids are the stereoisomers whose amine group is on the left side in the fisher projection. They are important in all types of functions in the cells. They are also an important part of proteins.

While D amino acids are the second type of isomers occurring in nature.

The amine group of these D isomers is on the right side of the fisher projection. These D amino acids are not included within the proteins by the cells.

Read more about What are amino acids made of