4EC5:
reference: New insights into the assembly of bacterial secretins: structural studies of the periplasmic domain of XcpQ from Pseudomonas aeruginosa., Van der Meeren R, Wen Y, Van Gelder P, Tommassen J, Devreese B, Savvides SN, J Biol Chem. 2012 Nov 27. PMID: 23188826

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