, Volume 4, Issue 3, pp 240–247

Leakage of adenylates during cold methanol/glycerol quenching of Escherichia coli

Original Article


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%).


Quenching Cold shock Cell leakage Adenylates Glycerol 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Hannes Link
    • 1
  • Bernd Anselment
    • 1
  • Dirk Weuster-Botz
    • 1
  1. 1.Lehrstuhl für BioverfahrenstechnikTechnische Universität MünchenGarchingGermany

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