Alpha-Aminobutyric acid

alpha-Aminobutyric acid (AABA) is an isomer of the amino acid aminobutyric acid with chemical formula C4H9NO2. There is also gamma-aminobutyric acid (GABA) and beta-aminobutyric acid.

It is a key intermediate in the biosynthesis of ophthalmic acid or ophthalmate, which was first isolated from calf lens.