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. 2008 Jun 28;51(9):1694–1697. doi: 10.1007/s00125-008-1069-x

Fig. 1.

Fig. 1

Metabolic routes of [13C]acetate. The 13C label can be lost in exchange reactions of the TCA cycle, which will reduce the recovery of the label in 13CO2 in breath gas. The loss of 13C label in exchange reactions depends on the rate of the TCA cycle flux