. "\"Catalysis of the reaction: L-galactono-1,4-lactone + O(2) = L-ascorbate + H(2)O(2) + H(+).\" [EC:1.3.3.12, RHEA:20620]" . . "L-galactonolactone oxidase activity" . "L-galactono-1,4-lactone oxidase activity" . "L-galactono-1,4-lactone:oxygen 3-oxidoreductase activity" . "L-xylono-1,4-lactone oxidase activity" . "EC:1.3.3.12" . "KEGG:R00643" . "MetaCyc:1.3.3.12-RXN" . "RHEA:20620" . . .