1FVI:
reference: Crystal structure of eukaryotic DNA ligase-adenylate illuminates the mechanism of nick sensing and strand joining., Odell M, Sriskanda V, Shuman S, Nikolov DB, Mol Cell 2000 Nov;6(5):1183-93. PMID: 11106756

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