3AU7:
reference: Structural basis of tRNA agmatinylation essential for AUA codon decoding., Osawa T, Kimura S, Terasaka N, Inanaga H, Suzuki T, Numata T, Nat Struct Mol Biol. 2011 Oct 16;18(11):1275-80. doi: 10.1038/nsmb.2144. PMID: 22002223

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