2I27:
reference: Maturation of Shark Single-domain (IgNAR) Antibodies: Evidence for Induced-fit Binding., Stanfield RL, Dooley H, Verdino P, Flajnik MF, Wilson IA, J Mol Biol. 2007 Mar 23;367(2):358-72. Epub 2006 Dec 22. PMID: 17258766

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