1NQ4:
reference: Solution structure and dynamics of oxytetracycline polyketide synthase acyl carrier protein from Streptomyces rimosus., Findlow SC, Winsor C, Simpson TJ, Crosby J, Crump MP, Biochemistry 2003 Jul 22;42(28):8423-33. PMID: 12859187

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