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Stereo view of superimposition between BbXFPK and tetrahedral donor substrate adducts of EcTK. Resting BbXFPK (yellow for protein and green for cofactor), X5P-ThDP (2R8O, black), and F6P-ThDP adduct of EcTK (2R8P, gray) are shown. Residues expected to participate in F6P binding are shown as stick models. Labels in parentheses are those of EcTK.
