3K44:
reference: X-ray structure of Pur-alpha reveals a Whirly-like fold and an unusual nucleic-acid binding surface., Graebsch A, Roche S, Niessing D, Proc Natl Acad Sci U S A. 2009 Nov 3;106(44):18521-6. Epub 2009 Oct 21. PMID: 19846792

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