1KL7:
reference: Structure and function of threonine synthase from yeast., Garrido-Franco M, Ehlert S, Messerschmidt A, Marinkovic' S, Huber R, Laber B, Bourenkov GP, Clausen T, J Biol Chem 2002 Apr 5;277(14):12396-405. PMID: 11756443

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