2B2N:
reference: Structural Basis for Transcription-coupled Repair: the N Terminus of Mfd Resembles UvrB with Degenerate ATPase Motifs., Assenmacher N, Wenig K, Lammens A, Hopfner KP, J Mol Biol. 2006 Jan 27;355(4):675-83. Epub 2005 Nov 8. PMID: 16309703

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