1TUW:
reference: Structural and functional analysis of tetracenomycin F2 cyclase from Streptomyces glaucescens. A type II polyketide cyclase., Thompson TB, Katayama K, Watanabe K, Hutchinson CR, Rayment I, J Biol Chem 2004 Sep 3;279(36):37956-63. Epub 2004 Jun 30. PMID: 15231835

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