3CRR:
reference: Structure of tRNA dimethylallyltransferase: RNA modification through a channel., Xie W, Zhou C, Huang RH, J Mol Biol. 2007 Mar 30;367(3):872-81. Epub 2007 Jan 24. PMID: 17292915

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