Xylan alpha-1,2-glucuronosidase (, 1,2-alpha-glucuronidase, alpha-(1->2)-glucuronidase, xylan alpha-D-1,2-(4-O-methyl)glucuronohydrolase) is an enzyme with systematic name xylan 2-alpha-D-(4-O-methyl)glucuronohydrolase. This enzyme catalyses the following chemical reaction