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. 2014 Jan 16;14(1):1576–1597. doi: 10.3390/s140101576

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — Time-resolved observation of metabolite isomers upon feeding a hyperpolarized [2-¹³C]fructose probe to a Saccharomyces cerevisiae cell cultures at time 0: (A) Glucose 6-phosphate (Glc6P) and fructose 1,6-bisphosphate (Fru1,6P₂) C₅ signals arise from gluconeogenic reactions of the glycolytic substrate. Isomer ratios are consistent with the formation of the isomers from acyclic intermediates; (B) real-time observation of dihydroxyaceyone phosphate (DHAP) hydrate formation as an off-pathway glycolytic intermediate (other abbreviations are: GA3P = glyceraldehyde 3-phosphate, Ald = aldolase; Pfk = phosphofructokinase; Tpi = triose phosphate isomerase).