1GKP:
reference: X-ray structure of a dihydropyrimidinase from Thermus sp. at 1.3 A resolution., Abendroth J, Niefind K, Schomburg D, J Mol Biol 2002 Jun 28;320(1):143-56. PMID: 12079340

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