1TRK:
reference: Refined structure of transketolase from Saccharomyces cerevisiae at 2.0 A resolution., Nikkola M, Lindqvist Y, Schneider G, J Mol Biol 1994 May 6;238(3):387-404. PMID: 8176731

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