... N-terminal and b-he licaldomains participate in binding of the polysaccharide,pullulan.Comparison of the active sites of the model of IPU and Dex49AThe active site structures of t he model of IPU ... 372, and 373are the potential catalytic r esidues of I PU. Also, Trp425 of Dex49A, which is the corresponding residue of Trp402 of IPU, is reportedly located in the vicinity of the active site and ... In the model of IPU,several aromatic and charged residues, Trp277, Tyr349, and Asp371, are p resent in t he v icinity of G ly350, and c ould b efavourable fo r binding of Glc +2 of the a-(1fi4)-linkedglucose...