4AXW: Crystal Structure Of Mouse Cadherin-23 Ec1-2 And Protocadher 2, Form I 2.2a.
reference: Structure of a force-conveying cadherin bond essential for inner-ear mechanotransduction., Sotomayor M, Weihofen WA, Gaudet R, Corey DP, Nature. 2012 Nov 7. doi: 10.1038/nature11590. PMID: 23135401

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