label: glucuronoxylan 4-O-methyltransferase activity
label_lc: glucuronoxylan 4-o-methyltransferase activity
description: "Catalysis of the reaction: S-adenosyl-L-methionine + glucuronoxylan D-glucuronate = S-adenosyl-L-homocysteine + glucuronoxylan 4-O-methyl-D-glucuronate."