Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA255577

Local Sample ID:	S1S2 0h_2
Subject ID:	SU002642
Subject Type:	Yeast
Subject Species:	Saccharomyces cerevisiae
Taxonomy ID:	4932
Genotype Strain:	CEN.P.K

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Sample Preparation:

Sampleprep ID:	SP002648
Sampleprep Summary:	Briefly, equal OD units of cells were rapidly quenched to stop metabolism by addition into 4 volumes of quenching buffer containing 60% methanol and 10 mM Tricine, pH 7.4 that was pre-cooled to -40°C. 5 min after holding at -40°C, cells were spun at 5,000 g for 3 min at 0°C, washed with the same buffer, and then resuspended in 1 mL extraction buffer containing 75% ethanol and 0.5 mM Tricine, pH 7.4. Intracellular metabolites were extracted by incubating at 75°C for 3 min, followed by chilling on ice for 5 min. Samples were spun at 20,000 g for 1 min to pellet cell debris, and 0.9 mL of the supernatant was transferred to a new tube. After a second spin at 20,000 g for 10 min, 0.8 mL of the supernatant was transferred to a new tube. Metabolites in the extraction buffer were dried using a vacuum concentrator system (Labconco) and stored at -80°C until analysis. Dried metabolite extracts were resuspended in 60% acetonitrile for injection.

Sampleprep ID:

SP002648

Sampleprep Summary:

Briefly, equal OD units of cells were rapidly quenched to stop metabolism by addition into 4 volumes of quenching buffer containing 60% methanol and 10 mM Tricine, pH 7.4 that was pre-cooled to -40°C. 5 min after holding at -40°C, cells were spun at 5,000 g for 3 min at 0°C, washed with the same buffer, and then resuspended in 1 mL extraction buffer containing 75% ethanol and 0.5 mM Tricine, pH 7.4. Intracellular metabolites were extracted by incubating at 75°C for 3 min, followed by chilling on ice for 5 min. Samples were spun at 20,000 g for 1 min to pellet cell debris, and 0.9 mL of the supernatant was transferred to a new tube. After a second spin at 20,000 g for 10 min, 0.8 mL of the supernatant was transferred to a new tube. Metabolites in the extraction buffer were dried using a vacuum concentrator system (Labconco) and stored at -80°C until analysis. Dried metabolite extracts were resuspended in 60% acetonitrile for injection.