Abstract

A method based on density gradient centrifugation for the accurate and rapid determination of concentrations of intracellular metabolites was developed. The new method was applied to determination of intracellular levels of lactate during lactate fermentation and of intracellular levels of glutamate during glutamate fermentation. The method gave satisfactory results, showing good reproducibility and reliability with a probability of 95%. This method will allow basic information to be obtained about the transport of metabolites from within cells to the culture broth and about dynamic changes in metabolism.

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