Substrate recognition by a carbohydrate-binding module in the prototypical ABC transporter for lipopolysaccharide O antigen from Escherichia coli O9a — Substrate recognition by a glycan ABC transporter — Substrate recognition by a carbohydrate-binding module in the prototypical ABC transporter for lipopolysaccharide O-antigen from Escherichia coli O9a — Substrate recognition by a glycan ABC transporter