This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is 3-dehydro-L-gulonate carboxy-lyase (L-xylulose-forming). Other names in common use include keto-L-gulonate decarboxylase, 3-keto-L-gulonate decarboxylase, and 3-dehydro-L-gulonate carboxy-lyase. This enzyme participates in pentose and glucuronate interconversions.
Smiley JD, Ashwell G (1961). "Purification and properties of beta-L-hydroxy acid dehydrogenase II. Isolation of beta-keto-L-gluconic acid, an intermediate in L-xylulose biosynthesis". J. Biol. Chem. 236: 357–364.