4ILU:
reference: Crystal structure of Mycobacterium tuberculosis CarD, an essential RNA polymerase binding protein, reveals a quasidomain-swapped dimeric structural architecture., Kaur G, Dutta D, Thakur KG, Proteins. 2013 Sep 30. doi: 10.1002/prot.24419. PMID: 24115125

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