3OSS:
reference: Structural and functional studies on the interaction of GspC and GspD in the type II secretion system., Korotkov KV, Johnson TL, Jobling MG, Pruneda J, Pardon E, Heroux A, Turley S, Steyaert J, Holmes RK, Sandkvist M, Hol WG, PLoS Pathog. 2011 Sep;7(9):e1002228. Epub 2011 Sep 8. PMID: 21931548

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