3CMA:
reference: Peptidyl-CCA deacylation on the ribosome promoted by induced fit and the O3'-hydroxyl group of A76 of the unacylated A-site tRNA., Simonovic M, Steitz TA, RNA. 2008 Nov;14(11):2372-8. Epub 2008 Sep 25. PMID: 18818369

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