3GBR:
reference: Activation of anthranilate phosphoribosyltransferase from Sulfolobus solfataricus by removal of magnesium inhibition and acceleration of product release ., Schlee S, Deuss M, Bruning M, Ivens A, Schwab T, Hellmann N, Mayans O, Sterner R, Biochemistry. 2009 Jun 16;48(23):5199-209. PMID: 19385665

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