1NCE:
reference: The only active mutant of thymidylate synthase D169, a residue far from the site of methyl transfer, demonstrates the exquisite nature of enzyme specificity., Birdsall DL, Finer-Moore J, Stroud RM, Protein Eng 2003 Mar;16(3):229-40. PMID: 12702803

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