4BF3:
reference: ErpC, a member of the complement regulator-acquiring family of surface proteins from Borrelia burgdorferi, possesses an architecture previously unseen in this protein family., Caesar JJ, Johnson S, Kraiczy P, Lea SM, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 Jun;69(Pt 6):624-8. doi:, 10.1107/S1744309113013249. Epub 2013 May 23. PMID: 23722838

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