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. 2011 Jun 24;6(6):e21507. doi: 10.1371/journal.pone.0021507

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Backbone is shown as ribbon, side chains that interact with metal as sticks and the metal ions as small spheres. The structures are coloured as follows: integrin (PDB code 1jv2; three examples) in shades of pink, lectin (2bwr; three examples) in shades of green, rhamnogalacturonan lyase (2z8r; three examples) in shades of blue and PilY1 (3hx6) in orange.