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MB Sample ID: SA176342

Local Sample ID:KA-012
Subject ID:SU001980
Subject Type:Mammal
Subject Species:Homo sapiens
Taxonomy ID:9606

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Sample Preparation:

Sampleprep ID:SP001986
Sampleprep Summary:Cells were washed with ice-cold 150 mM ammonium acetate twice before adding 1 mL of ice-cold 80% methanol. After vigorous vortexing, samples were centrifuged at maximum speed, the aqueous layer was transferred to a glass vial and the metabolites were dried under vacuum. Metabolites were resuspended in 50 μL 70% acetonitrile (ACN) and 5 μL of this solution used for the mass spectrometer-based analysis. The analysis was performed on a Q Exactive (Thermo Fisher Scientific) in polarity-switching mode with positive voltage 4.0 kV and negative voltage 4.0 kV. The mass spectrometer was coupled to an UltiMate 3000RSLC (Thermo Fisher Scientific) UHPLC system. Mobile phase A was 5 mM ammonium acetate (NH4AcO), pH 9.9, B was acetonitrile and the separation achieved on a Luna 3 mm NH2 100 A column (150 × 2.0 mm, Phenomenex). The flow was 200 μL/min, and the gradient ran from 15% A to 95% A in 18 min, followed by an isocratic step for 9 min and re-equilibration for 7 min. Metabolites were detected and quantified as area under the curve based on retention time and accurate mass (≤ 3 p.p.m.) using the TraceFinder 3.1 (Thermo Fisher Scientific). Relative amounts of metabolites between various conditions, as well as percentage of [13C6]glucose labeling, were calculated and corrected for naturally occurring 13C abundance.
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