Included in this CD is the L-sorbosone dehydrogenase (SNDH) from Gluconobacter oxydans UV10. In G. oxydans, D-sorbitol is converted to 2-keto-L-gulonate (a precursor of L-ascorbic acid) in sequential oxidation steps catalyzed by a FAD-dependent, L-sorbose dehydrogenase and an NAD(P)+-dependent, L-sorbosone dehydrogenase.