2CWF:
reference: Crystal structures of Delta1-piperideine-2-carboxylate/Delta1-pyrroline-2-carboxylate reductase belonging to a new family of NAD(P)H-dependent oxidoreductases: conformational change, substrate recognition, and stereochemistry of the reaction., Goto M, Muramatsu H, Mihara H, Kurihara T, Esaki N, Omi R, Miyahara I, Hirotsu K, J Biol Chem. 2005 Dec 9;280(49):40875-84. Epub 2005 Sep 28. PMID: 16192274

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