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Starch branching enzymes from (A) Cyanothece sp. ATCC 51142 in complex with maltoheptaose (PDB entry 5GQX), (B) O. sativa in complex with maltopentaose (PDB entry 3VU2) and (C) E. coli in complex with maltoheptaose and α-cyclodextrin (PDB entries 4LPC and 5E6Y). The active site residues are shown as green sticks and all glucans in purple.
