5SVD:
reference: Nop9 is a PUF-like protein that prevents premature cleavage to correctly process pre-18S rRNA., Zhang J, McCann KL, Qiu C, Gonzalez LE, Baserga SJ, Hall TM, Nat Commun. 2016 Oct 11;7:13085. doi: 10.1038/ncomms13085. PMID: 27725644

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