4HOI:
reference: Structural properties of PAS domains from the KCNH potassium channels., Adaixo R, Harley CA, Castro-Rodrigues AF, Morais-Cabral JH, PLoS One. 2013;8(3):e59265. doi: 10.1371/journal.pone.0059265. Epub 2013 Mar 15. PMID: 23555008

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