4UEY:
reference: Acidic pH and divalent cation sensing by PhoQ are dispensable for systemic salmonellae virulence., Hicks KG, Delbecq SP, Sancho-Vaello E, Blanc MP, Dove KK, Prost LR, Daley ME, Zeth K, Klevit RE, Miller SI, Elife. 2015 May 23;4:e06792. doi: 10.7554/eLife.06792. PMID: 26002083

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