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Structure of BhCel5B. A, all important residues required for substrate recognition and catalysis presented on GH5_4 catalytic domain are drawn as sticks. B, BhCel5B is a tri-modular protein, composed of an N-terminal glycoside hydrolase family 5 catalytic module (GH5_4) followed by an immunoglobulin-like module (Ig) and a C-terminal family 46 CBM. Catalytic residues on GH5_4, Glu-170, and Glu-296, are drawn as sticks.
