3O9X:
reference: Structure of the E. coli antitoxin MQSA (YGIT/B3021) bound to its gene promoter reveals extensive domain rearrangements and the specificity of transcriptional regulation., Brown BL, Wood TK, Peti W, Page R, J Biol Chem. 2010 Nov 9. PMID: 21068382

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