2TSC:
reference: Structure, multiple site binding, and segmental accommodation in thymidylate synthase on binding dUMP and an anti-folate., Montfort WR, Perry KM, Fauman EB, Finer-Moore JS, Maley GF, Hardy L, Maley F, Stroud RM, Biochemistry 1990 Jul 31;29(30):6964-77. PMID: 2223754

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