1OY5:
reference: Crystal structure of tRNA (m1G37) methyltransferase from Aquifex aeolicus at 2.6 A resolution: a novel methyltransferase fold., Liu J, Wang W, Shin DH, Yokota H, Kim R, Kim SH, Proteins 2003 Nov 1;53(2):326-8. PMID: 14517984

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