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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: J Neurochem. 2010 Mar 14;113(6):1447–1458. doi: 10.1111/j.1471-4159.2010.06684.x

Fig. 1.

Fig. 1

Schematic diagram of the labeling of cerebral metabolites from [1-13C] glucose. Whole filed circle: 100% 13C enrichment in this position; Half filled circle: 50% 13C enrichment in this position; Red: labeled position after the first TCA circle, Blue: labeled position of the second TCA circle. The number “1” denotes the position of Carbon 1 in each molecule.