Abstract:Wild-type flavocytochrome b2 @-lactate dehydrogenase) from Saccharomyces cerevisiae, as well as a number of its point mutants, can be expressed to a reasonable level as recombinant proteins in Escherichia coli (20-25 mg per liter culture) with a full complement of prosthetic groups. At the same expression level, active-site mutants Y254L and D282N, on the other hand, were obtained with an FMN/heme ratio significantly less than unity, which could not be raised by addition of free FMN. Evidence is provided that … Show more
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