5KF6:
reference: Structures of Proline Utilization A Reveal the Fold and Functions of the Aldehyde Dehydrogenase Superfamily Domain of Unknown Function., Luo M, Gamage TT, Arentson BW, Schlasner KN, Becker DF, Tanner JJ, J Biol Chem. 2016 Sep 27. pii: jbc.M116.756965. PMID: 27679491

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