1F6Y:
reference: Crystal structure of a methyltetrahydrofolate- and corrinoid-dependent methyltransferase., Doukov T, Seravalli J, Stezowski JJ, Ragsdale SW, Structure Fold Des 2000 Aug 15;8(8):817-30. PMID: 10997901

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