1P9N:
reference: Molecules of Escherichia coli MobB assemble into densely packed hollow cylinders in a crystal lattice with 75% solvent content., Rangarajan SE, Tocilj A, Li Y, Iannuzzi P, Matte A, Cygler M, Acta Crystallogr D Biol Crystallogr 2003 Dec;59(Pt 12):2348-52. PMID: 14646116

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