6xxe is a 16 chain structure with sequence from Thermus thermophilus HB27. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Neuhaus A, Selvaraj M, Salzer R, Langer JD, Kruse K, Kirchner L, Sanders K, Daum B, Averhoff B, Gold VAM. Cryo-electron microscopy reveals two distinct type IV pili assembled by the same bacterium. Nat Commun. 2020 May 6;11(1):2231. doi: 10.1038/s41467-020-15650-w. PMID:32376942 doi:http://dx.doi.org/10.1038/s41467-020-15650-w