Aspartic acid, also known as aspartate, is an amino acid with an acidic side chain. At normal pH it usually carries a negative charge. This is due to a missing proton from the -COOH (carboxylic acid) group.
It is coded for by the the three letter code Asp and the one letter code D.
- ↑ Berg, Tymoczko and Stryer. (2006) Biochemistry, 6th edition, New York: WH Freeman