Peroxisomal hydroxyacid oxidase 1 catalyzes the reaction of glyoxylate to form oxalate. The active form of the enzyme is associated with FMN and is a tetramer (Jones et al. 2000; Murray et al. 2008; Vignaud et al. 2007; Williams et al. 2000).
glyoxylate oxidase activity of HAO1 tetramer [peroxisomal matrix]