3BOP:
reference: Crystal Structures of beta-Neurexin 1 and beta-Neurexin 2 Ectodomains and Dynamics of Splice Insertion Sequence 4., Koehnke J, Jin X, Trbovic N, Katsamba PS, Brasch J, Ahlsen G, Scheiffele P, Honig B, Palmer AG 3rd, Shapiro L, Structure. 2008 Mar;16(3):410-21. PMID: 18334216

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