2RJZ:
reference: Periplasmic domains of Pseudomonas aeruginosa PilN and PilO form a stable heterodimeric complex., Sampaleanu LM, Bonanno JB, Ayers M, Koo J, Tammam S, Burley SK, Almo SC, Burrows LL, Howell PL, J Mol Biol. 2009 Nov 20;394(1):143-59. PMID: 19857646

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