5X9Y:
reference: Crystal structure and DNA-binding property of the ATPase domain of bacterial mismatch repair endonuclease MutL from Aquifex aeolicus., Fukui K, Iino H, Baba S, Kumasaka T, Kuramitsu S, Yano T, Biochim Biophys Acta. 2017 Sep;1865(9):1178-1187. doi:, 10.1016/j.bbapap.2017.06.024. Epub 2017 Jun 29. PMID: 28668638

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