5XN4:
reference: Solution structure and dynamics of anti-CRISPR AcrIIA4, the Cas9 inhibitor., Kim I, Jeong M, Ka D, Han M, Kim NK, Bae E, Suh JY, Sci Rep. 2018 Mar 1;8(1):3883. doi: 10.1038/s41598-018-22177-0. PMID: 29497118

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