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Structural alignment of partial amino acid sequences of α-, β-, and γ-repeats of CNL. The alignment was performed with the protein structure comparison service PDBeFold (SSM) (53) at the European Bioinformatics Institute. Structurally aligned β-strands are shaded gray, amino acid residues involved in lactose and LDN binding are in boldface, and the Ser residue involved in LDN binding is underlined.
