1HGX:
reference: Crystal structure of the hypoxanthine-guanine-xanthine phosphoribosyltransferase from the protozoan parasite Tritrichomonas foetus., Somoza JR, Chin MS, Focia PJ, Wang CC, Fletterick RJ, Biochemistry 1996 Jun 4;35(22):7032-40. PMID: 8679528

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