1MGT:
reference: Hyperthermostable protein structure maintained by intra and inter-helix ion-pairs in archaeal O6-methylguanine-DNA methyltransferase., Hashimoto H, Inoue T, Nishioka M, Fujiwara S, Takagi M, Imanaka T, Kai Y, J Mol Biol 1999 Sep 24;292(3):707-16. PMID: 10497033

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