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desulfurized. The importance of this step has been illustrated by experiments in which flavin
reductases, flavin mononucleotide reductases, or various oxidoreductases were added to the
reaction mixture or over-expressed in recombinant constructs, leading to up to 100-fold
increases in desulfurization rates [7].
Figure 21. Dsz pathway of R. erythropus [8].
2.2.3. Substrate specificity . The enzymes of the rhodococcal Dsz pathway appear to have
fairly relaxed specificities within the DBT family, desulfurizing derivatives with alkyl or aryl
substitutions at rates depending on the position of the substitution: those with fewer
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