2YMJ:
reference: Solution structure of the QUA1 dimerization domain of pXqua, the Xenopus ortholog of Quaking., Ali M, Broadhurst RW, PLoS One. 2013;8(3):e57345. doi: 10.1371/journal.pone.0057345. Epub 2013 Mar 8. PMID: 23520467

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