2TSR:
reference: Crystal structures of rat thymidylate synthase inhibited by Tomudex, a potent anticancer drug., Sotelo-Mundo RR, Ciesla J, Dzik JM, Rode W, Maley F, Maley GF, Hardy LW, Montfort WR, Biochemistry 1999 Jan 19;38(3):1087-94. PMID: 9894005

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