3O31:
reference: The crystallographic structure of thermoNicotianamine synthase with a synthetic reaction intermediate highlights the sequential processing mechanism., Dreyfus C, Larrouy M, Cavelier F, Martinez J, Pignol D, Arnoux P, Chem Commun (Camb). 2011 May 28;47(20):5825-7. Epub 2011 Apr 12. PMID: 21487608

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