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Structural alignment of the active site residues from barley LD in complex with LDI and from free LD (PDB code 4AIO). Residues of complexed LD (white sticks), which are in contact with LDI (distance <4.0 Å), are superimposed with the corresponding residues of free LD (green sticks). The residues, which adopt different rotamers, are marked with dotted ovals.
