1TXK:
reference: Structural analysis of Escherichia coli OpgG, a protein required for the biosynthesis of osmoregulated periplasmic glucans., Hanoulle X, Rollet E, Clantin B, Landrieu I, Odberg-Ferragut C, Lippens G, Bohin JP, Villeret V, J Mol Biol 2004 Sep 3;342(1):195-205. PMID: 15313617

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