2LC4:
reference: Characterization of the PilN, PilO and PilP type IVa pilus subcomplex., Tammam S, Sampaleanu LM, Koo J, Sundaram P, Ayers M, Andrew Chong P, Forman-Kay JD, Burrows LL, Howell PL, Mol Microbiol. 2011 Dec;82(6):1496-514. doi:, 10.1111/j.1365-2958.2011.07903.x. Epub 2011 Nov 18. PMID: 22053789

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