. "Exists as two major isoenzymes; the A form preferentially oxidizes short-chain aliphatic hydroxy acids; the B form preferentially oxidizes long-chain and aromatic hydroxy acids." . "The rat isoenzyme B also acts as EC 1.4.3.2." . . . "Glycolate oxidase" . "(S)-2-hydroxy-acid oxidase" . "Hydroxy-acid oxidase A" . "Hydroxy-acid oxidase B" . . "(S)-2-hydroxy acid + O(2) = 2-oxo acid + H(2)O(2)." . "FMN" .