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Microbody-marker Enzymes during Transition from Phototrophic to Organotrophic Growth in Euglena1

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PMC
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Abstract

Transfer of Euglena gracilis Klebs Z cells from phototrophic to organotrophic growth on acetate results in derepression of the key enzymes of the glyoxylate cycle, malate synthase and isocitrate lyase, which appear coordinately regulated. The derepression of malate synthase and isocitrate lyase was accompanied by increased specific activities of succinate dehydrogenase, fumarase, and malate dehydrogenase, but hydroxypyruvate reductase activity was unaltered.

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