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Surface structures of the CBM.A, substrate-binding mode at CBM35. Green, cyan, magenta, and yellow, carbons of chains A, B, C, and D of E208A_Gal3, respectively; red, oxygen. Left, nonreducing end of Gal3; right, reducing end. B, calcium ion–binding mode at CBM35. Calcium ion is represented as green spheres, and interacting residues are shown as stick models. Yellow dots, interaction.
