Characterization of an Enzyme reducing Pyrroline-5-Carboxylate to Proline

@article{Smith1956CharacterizationOA,
  title={Characterization of an Enzyme reducing Pyrroline-5-Carboxylate to Proline},
  author={Marion E. Smith and David M. Greenberg},
  journal={Nature},
  year={1956},
  volume={177},
  pages={1130-1130}
}
SEVERAL lines of evidence serve to establish glutamic-γ-semialdehyde as the key intermediate in the pathway of the biosynthesis of proline from either glutamic acid or ornithine1,2. Since glutamic-γ-semialdehyde spontaneously cyclizes nearly completely to Δ1-pyrroline-5-carboxylic acid2, hydrogenation of the latter becomes a key reaction in the biogenesis of proline. 
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Metabolism of proline and the hydroxyprolines.
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Proline Biosynthesis: The Glutamate Pathway and Proline Degradation: The Om Pathway.
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