2QVC:
reference: Structure of a periplasmic glucose-binding protein from Thermotoga maritima., Palani K, Kumaran D, Burley SK, Swaminathan S, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Dec 1;68(Pt 12):1460-4., doi: 10.1107/S1744309112045241. Epub 2012 Nov 19. PMID: 23192024

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