5UX5:
reference: Structure and characterization of a class 3B proline utilization A: ligand-induced dimerization and importance of the C-terminal domain for catalysis., Korasick D, Gamage TT, Christgen S, Stiers KM, Beamer LJ, Henzl MT, Becker DF, Tanner JJ, J Biol Chem. 2017 Apr 18. pii: jbc.M117.786855. doi: 10.1074/jbc.M117.786855. PMID: 28420730

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