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Structural comparison. (A) Superimposition of the overall structures of Laz-C (green) and Paz (blue) (PDB code, 3AZU). (B) Metal-binding site. Left, Laz (carbon, green; nitrogen, blue; oxygen, red; and sulfur, yellow); right, superimposition of copper (blue)- and zinc (purple)-binding Paz proteins. Balls colored red and orange indicate the zinc and copper ions, respectively.
