label: 3-dehydro-L-gulonate 2-dehydrogenase activity
label_lc: 3-dehydro-l-gulonate 2-dehydrogenase activity
description: "Catalysis of the reaction: 3-dehydro-L-gulonate + NAD(P)+ = (4R,5S)-4,5,6-trihydroxy-2,3-dioxohexanoate + NAD(P)H + H+."