3U1M:
reference: Structure of the mRNA splicing complex component Cwc2: insights into RNA recognition., Lu P, Lu G, Yan C, Wang L, Li W, Yin P, Biochem J. 2012 Jan 15;441(2):591-7. doi: 10.1042/BJ20111385. PMID: 21957909

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