1YC9:
reference: The crystal structure of the outer membrane protein VCEC from the bacterial pathogen vibrio cholerae at 1.8 A resolution., Federici L, Du D, Walas F, Matsumura H, Fernandez-Recio J, McKeegan KS, Borges-Walmsley MI, Luisi BF, Walmsley AR, J Biol Chem 2005 Jan 31;. PMID: 15684414

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