A recent review suggested that the activity of NADH-fumarate reductase from trypanosomatids could be catalyzed by succinate dehydrogenase working in reverse (Tielens and van Hellemond, Parasitol. Today 14, 265-271, 1999). The results reported in this study demonstrate that the two activities can easily be separated without any loss in either activity, suggesting that fumarate reductase and succinate dehydrogenase are separate enzymes.
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Christmas et al. (2000) studied this question.
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