| Section2 = | Section3 = }} Aspartic acid (abbreviated as Asp or D; Asx or B represent either aspartic acid or asparagine)'s an α-amino acid with the chemical formula HO2CCH(NH2)CH2CO2H. The carboxylate anion of aspartic acid's known as aspartate. The L-isomer of aspartate's one of the 20 proteinogenic amino acids, for example, the building blocks of proteins. Its codons are GAU and GAC. Aspartic acid's, together with glutamic acid, classified as an acidic amino acid with a pKa of 4.0. A… (More on Aspartate)