4KL6:
reference: Intermolecular domain swapping induces intein-mediated protein alternative splicing., Aranko AS, Oeemig JS, Kajander T, Iwai H, Nat Chem Biol. 2013 Aug 25. doi: 10.1038/nchembio.1320. PMID: 23974115

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