3NMO:
reference: Design, function and structure of a monomeric ClC transporter., Robertson JL, Kolmakova-Partensky L, Miller C, Nature. 2010 Dec 9;468(7325):844-7. Epub 2010 Nov 3. PMID: 21048711

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