4JL0:
reference: Membrane and chaperone recognition by the major translocator protein PopB of the type III secretion system of Pseudomonas aeruginosa., Discola KF, Forster A, Boulay F, Simorre JP, Attree I, Dessen A, Job V, J Biol Chem. 2013 Dec 10. PMID: 24297169

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