In enzymology, a L-ascorbate oxidase (EC 1.10.3.3) is an enzyme that catalyzes the chemical reaction2 L-ascorbate + O2 ↔ 2 dehydroascorbate + 2 H2O. Thus, the two substrates of this enzyme are L-ascorbate and O2, whereas its two products are dehydroascorbate and H2O.https://www.creative-enzymes.com/product/Native-Cucurbita-Sp-Lascorbate-Oxidase_720.html