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Modulating OvoA reactivity by replacing Y417 using a tyrosine analogue. (A) The active site of the cysteine dioxygenase crystal structure shows the tyrosine–cysteine cross-link, which is mimicked by a tyrosine analogue MtTyr in the OvoA Y417MtTyr variant. (B) Reaction results for wild-type OvoA and the Y417MtTyr variant, suggesting that the OvoA activities can be modulated by replacing Y417 using tyrosine analogues.
