1SYN:
reference: The complex of the anti-cancer therapeutic, BW1843U89, with thymidylate synthase at 2.0 A resolution: implications for a new mode of inhibition., Stout TJ, Stroud RM, Structure 1996 Jan 15;4(1):67-77. PMID: 8805515

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