3AII:
reference: Structure of an archaeal non-discriminating glutamyl-tRNA synthetase: a missing link in the evolution of Gln-tRNAGln formation., Nureki O, O'Donoghue P, Watanabe N, Ohmori A, Oshikane H, Araiso Y, Sheppard K, Soll D, Ishitani R, Nucleic Acids Res. 2010 Jul 3. PMID: 20601684

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