6SY9:
reference: The structure of the Legionella response regulator LqsR reveals amino acids critical for phosphorylation and dimerization., Hochstrasser R, Hutter CAJ, Arnold FM, Barlocher K, Seeger MA, Hilbi H, Mol Microbiol. 2020 Jan 29. doi: 10.1111/mmi.14477. PMID: 31997467

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