2JML:
reference: Structural basis for operator and antirepressor recognition by Myxococcus xanthus CarA repressor., Navarro-Aviles G, Jimenez MA, Perez-Marin MC, Gonzalez C, Rico M, Murillo FJ, Elias-Arnanz M, Padmanabhan S, Mol Microbiol. 2007 Feb;63(4):980-94. PMID: 17233828

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