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RW PME residues in contact with hexasaccharide V when its complex with YbhC (Fries et al., 2007 ▶) is superposed onto RW PME. This hexasaccharide V simulates the product of the reaction since it consists of galacturonic acid residues. Bold labels denote residues involved in catalysis and transition-state stabilization. The asterisk denotes the reducing end of the hexasaccharide.
