389D:
reference: Crystal structures of B-DNA with incorporated 2'-deoxy-2'-fluoro-arabino-furanosyl thymines: implications of conformational preorganization for duplex stability., Berger I, Tereshko V, Ikeda H, Marquez VE, Egli M, Nucleic Acids Res 1998 May 15;26(10):2473-80. PMID: 9580702

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