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Explain How An Organism That Possesses The Citrate

lyase enzyme might not test positively on Simmons citrate agar. Is this a false negative result? Why or why not?
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The citrate test determines if an organism has the ability to transport citrate into the cell with the enzyme citrate permease and survive with citrate as the sole carbon source. Citrate lyase, which catalyzes the conversion of citrate into oxaloacetate and acetate, is associated with how citrate is used, not how it gets into the cell. So, an organism could be citrate-negative (it doesn't make citrate permease), but still be citrate lyase-positive.

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