2ONB:
reference: Cooperative inhibition of human thymidylate synthase by mixtures of active site binding and allosteric inhibitors(,)., Lovelace LL, Gibson LM, Lebioda L, Biochemistry. 2007 Mar 13;46(10):2823-30. Epub 2007 Feb 13. PMID: 17297914

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