5GUS:
reference: Crystal structure of an ASCH protein from Zymomonas mobilis and its ribonuclease activity specific for single-stranded RNA., Kim BN, Shin M, Ha SC, Park SY, Seo PW, Hofmann A, Kim JS, Sci Rep. 2017 Sep 26;7(1):12303. doi: 10.1038/s41598-017-12186-w. PMID: 28951575

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