4EW1:
reference: Biological and Structural Evaluation of 10R- and 10S-Methylthio-DDACTHF Reveals a New Role for Sulfur in Inhibition of Glycinamide Ribonucleotide Transformylase., Connelly S, Demartino JK, Boger DL, Wilson IA, Biochemistry. 2013 Jul 30;52(30):5133-44. doi: 10.1021/bi4005182. Epub 2013 Jul, 19. PMID: 23869564

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