3G5B:
reference: Autoinhibition of UNC5b revealed by the cytoplasmic domain structure of the receptor., Wang R, Wei Z, Jin H, Wu H, Yu C, Wen W, Chan LN, Wen Z, Zhang M, Mol Cell. 2009 Mar 27;33(6):692-703. PMID: 19328064

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