2H0B:
reference: Crystal structure of the second LNS/LG domain from neurexin 1alpha: Ca2+ binding and the effects of alternative splicing., Sheckler LR, Henry L, Sugita S, Sudhof TC, Rudenko G, J Biol Chem. 2006 Aug 11;281(32):22896-905. Epub 2006 Jun 13. PMID: 16772286

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