1C2Y:
reference: Crystal structure analysis of a pentameric fungal and an icosahedral plant lumazine synthase reveals the structural basis for differences in assembly., Persson K, Schneider G, Jordan DB, Viitanen PV, Sandalova T, Protein Sci 1999 Nov;8(11):2355-65. PMID: 10595538

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