4.1.1.67 Biosynthesis of uridine diphosphate D-xylose. V. UDP-D-glucuronate and UDP-D-galacturonate carboxy-lyase of Ampullariella digitata Actinoplanes digitatis 4.1.1.67 UDP-galacturonic acid decarboxylase from Ampullariella digitata Actinoplanes digitatis