3OQH:
reference: Structural basis for nonribosomal peptide synthesis by an aminoacyl-tRNA synthetase paralog., Bonnefond L, Arai T, Sakaguchi Y, Suzuki T, Ishitani R, Nureki O, Proc Natl Acad Sci U S A. 2011 Mar 8;108(10):3912-7. Epub 2011 Feb 15. PMID: 21325056

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