What is the meaning of D in D-Aspartic acid?

Answer 1

Aspartic acid (abbreviated as Asp or D) is an α-amino acid, It is an abbreviation

It means right-handed. Carbohydrates and amino acids are designated as D- or L- according to the stereochemistry of the highest numbered carbon in the Fischer projection. If the hydroxyl group (or amino group for amino acids) is pointing to the right in the Fischer Projection, it is designated as D. If the hydroxyl group (or amino group for amino acids) is pointing to the left, the sugars amino acid) is designated as L. Most naturally occurring carbohydrates such as D-Aspartic acid