4B2F:
reference: Structural characterization of the Borrelia burgdorferi outer surface protein BBA73 implicates dimerization as a functional mechanism., Brangulis K, Petrovskis I, Kazaks A, Baumanis V, Tars K, Biochem Biophys Res Commun. 2013 Apr 22. pii: S0006-291X(13)00654-2. doi:, 10.1016/j.bbrc.2013.04.028. PMID: 23618869

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