2V50:
reference: Crystal structure of the multidrug exporter MexB from Pseudomonas aeruginosa., Sennhauser G, Bukowska MA, Briand C, Grutter MG, J Mol Biol. 2009 May 29;389(1):134-45. Epub 2009 Apr 8. PMID: 19361527

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