1RI2:
reference: Structure and mechanism of mRNA cap (guanine-N7) methyltransferase., Fabrega C, Hausmann S, Shen V, Shuman S, Lima CD, Mol Cell 2004 Jan 16;13(1):77-89. PMID: 14731396

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