4GIW:
reference: Crystal structure and functional implication of the RUN domain of human NESCA., Sun Q, Han C, Liu L, Wang Y, Deng H, Bai L, Jiang T, Protein Cell. 2012 Aug;3(8):609-17. Epub 2012 Jul 22. PMID: 22821014

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