2JMZ:
reference: NMR structure of a KlbA intein precursor from Methanococcus jannaschii., Johnson MA, Southworth MW, Herrmann T, Brace L, Perler FB, Wuthrich K, Protein Sci. 2007 Jul;16(7):1316-28. PMID: 17586768

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