1UI6:
reference: Crystal structure of a gamma-butyrolactone autoregulator receptor protein in Streptomyces coelicolor A3(2)., Natsume R, Ohnishi Y, Senda T, Horinouchi S, J Mol Biol 2004 Feb 13;336(2):409-19. PMID: 14757054

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