4XWS:
reference: Structural details of the OxyR peroxide-sensing mechanism., Jo I, Chung IY, Bae HW, Kim JS, Song S, Cho YH, Ha NC, Proc Natl Acad Sci U S A. 2015 May 19;112(20):6443-8. doi:, 10.1073/pnas.1424495112. Epub 2015 Apr 30. PMID: 25931525

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