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. 2006 May 20;2(1):41–52. doi: 10.1007/s11306-006-0018-2

Table 2.

Independent mass isotopomers in the metabolic system.

Metabolite Number of independent mass isotopomersa
Plasma glucose 6
Plasma lactate 3
Hepatic pyruvate 3
Hepatic oxaloacetate 4
Hepatic fumarate 4
Hepatic phosphoenolpyruvate 3
Hepatic glucose-6-phosphate 6
Total 29

aMass isotopomers values are modeled as fractional abundances. For each metabolite one isotopomer is not independent but known as 1 – sum of all other isotopomers.