4RSW:
reference: Crystal structure of the effector protein HopA1 from Pseudomonas syringae., Park Y, Shin I, Rhee S, J Struct Biol. 2015 Mar;189(3):276-80. doi: 10.1016/j.jsb.2015.02.002. Epub 2015 , Feb 11. PMID: 25681297

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