6DRT:
reference: T4 DNA ligase structure reveals a prototypical ATP-dependent ligase with a unique mode of sliding clamp interaction., Shi K, Bohl TE, Park J, Zasada A, Malik S, Banerjee S, Tran V, Li N, Yin Z, Kurniawan F, Orellana K, Aihara H, Nucleic Acids Res. 2018 Aug 29. pii: 5085977. doi: 10.1093/nar/gky776. PMID: 30169742

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