5YZ2:
reference: The C2'- and C3'-endo equilibrium for AMP molecules bound in the cystathionine-beta-synthase domain., Feng N, Qi C, Hou YJ, Zhang Y, Wang DC, Li DF, Biochem Biophys Res Commun. 2018 Mar 4;497(2):646-651. doi:, 10.1016/j.bbrc.2018.02.124. Epub 2018 Feb 15. PMID: 29453981

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