1ELQ:
reference: Crystal structure of the cystine C-S lyase from Synechocystis: stabilization of cysteine persulfide for FeS cluster biosynthesis., Clausen T, Kaiser JT, Steegborn C, Huber R, Kessler D, Proc Natl Acad Sci U S A 2000 Apr 11;97(8):3856-61. PMID: 10760256

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