1Z7W:
reference: Molecular Basis of Cysteine Biosynthesis in Plants: STRUCTURAL AND FUNCTIONAL ANALYSIS OF O-ACETYLSERINE SULFHYDRYLASE FROM ARABIDOPSIS THALIANA., Bonner ER, Cahoon RE, Knapke SM, Jez JM, J Biol Chem 2005 Nov 18;280(46):38803-13. Epub 2005 Sep 15. PMID: 16166087

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