Abstract
Effective and rapid inactivation of cellular metabolism is a prerequisite for accurate metabolome analysis. Cold methanol quenching is commonly applied to stop any metabolic activity and, at the same time remaining the cells’ integrity. However, it is reported that especially prokaryotic cells like Escherichia coli and Corynebacterium glutamicum tend to leak intracellular metabolites during cold methanol quenching. In this work leakage of adenylates is quantified for different quenching fluids. Further, a methanol/glycerol based quenching fluid is proposed, which reduces leakage drastically compared to the commonly applied methanol/water solution (16% ATP leakage compared to more than 70%).
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Acknowledgement
This study is based on the work supported by the Deutsche Forschungsgemeinschaft DFG under Grant No. WE 2715/10-1.
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Link, H., Anselment, B. & Weuster-Botz, D. Leakage of adenylates during cold methanol/glycerol quenching of Escherichia coli . Metabolomics 4, 240–247 (2008). https://doi.org/10.1007/s11306-008-0114-6
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DOI: https://doi.org/10.1007/s11306-008-0114-6