3LND:
reference: Two-step adhesive binding by classical cadherins., Harrison OJ, Bahna F, Katsamba PS, Jin X, Brasch J, Vendome J, Ahlsen G, Carroll KJ, Price SR, Honig B, Shapiro L, Nat Struct Mol Biol. 2010 Mar;17(3):348-57. Epub 2010 Feb 28. PMID: 20190754

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).