1TLC:
reference: Promotion of purine nucleotide binding to thymidylate synthase by a potent folate analogue inhibitor, 1843U89., Weichsel A, Montfort WR, Ciesla J, Maley F, Proc Natl Acad Sci U S A 1995 Apr 11;92(8):3493-7. PMID: 7724588

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