3DWT:
reference: General strategy to humanize a camelid single-domain antibody and identification of a universal humanized nanobody scaffold., Vincke C, Loris R, Saerens D, Martinez-Rodriguez S, Muyldermans S, Conrath K, J Biol Chem. 2008 Nov 14. PMID: 19010777

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