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Stereoviews of the copper-binding loops. Overlays of AZ2A2A (slate) and AMI (yellow) (A), AZ4A3A (green) and AZ (gray) (B), and AZ4A4A (red) and auracyanin B (cyan) (C). The loop residues are shown as stick models, and the copper ions as spheres. Ligands are numbered as in AZ2A2A (A) and AZ4A4A (C).
