4U03:
reference: Structural Biochemistry of a Vibrio cholerae Dinucleotide Cyclase Reveals Cyclase Activity Regulation by Folates., Zhu D, Wang L, Shang G, Liu X, Zhu J, Lu D, Wang L, Kan B, Zhang JR, Xiang Y, Mol Cell. 2014 Sep 18;55(6):931-7. doi: 10.1016/j.molcel.2014.08.001. Epub 2014, Sep 4. PMID: 25201413

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