5UR2:
reference: Biophysical investigation of type A PutAs reveals a conserved core oligomeric structure., Korasick DA, Singh H, Pemberton TA, Luo M, Dhatwalia R, Tanner JJ, FEBS J. 2017 Jul 15. doi: 10.1111/febs.14165. PMID: 28710792

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