1TYS:
reference: Water-mediated substrate/product discrimination: the product complex of thymidylate synthase at 1.83 A., Fauman EB, Rutenber EE, Maley GF, Maley F, Stroud RM, Biochemistry 1994 Feb 15;33(6):1502-11. PMID: 8312270

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