TABLE 2.

Measured mass isotopomer fractions and standard deviations for the gluconate tracer experiment

Metabolite	Mass isotopomer	Measured fractiona
Gluconate in medium	m + 0	0.000 ± 0.000
	m + 1	0.000 ± 0.000
	m + 2	0.000 ± 0.000
	m + 3	0.000 ± 0.000
	m + 4	0.002 ± 0.000
	m + 5	0.059 ± 0.001
	m + 6	0.939 ± 0.001
Gluconateb	m + 0	0.217 ± 0.006
	m + 1	0.019 ± 0.001
	m + 2	0.003 ± 0.001
	m + 3	0.001 ± 0.000
	m + 4	0.002 ± 0.001
	m + 5	0.040 ± 0.003
	m + 6	0.718 ± 0.007
g6pb	m + 0	0.866 ± 0.003
	m + 1	0.094 ± 0.002
	m + 2	0.017 ± 0.002
	m + 3	0.015 ± 0.000
	m + 4	0.007 ± 0.000
	m + 5	0.001 ± 0.000
	m + 6	0.001 ± 0.000
f6pb	m + 0	0.852 ± 0.004
	m + 1	0.094 ± 0.003
	m + 2	0.024 ± 0.001
	m + 3	0.016 ± 0.001
	m + 4	0.012 ± 0.002
	m + 5	0.002 ± 0.001
	m + 6	0.000 ± 0.000
6pgb	m + 0	0.786 ± 0.003
	m + 1	0.082 ± 0.003
	m + 2	0.015 ± 0.001
	m + 3	0.011 ± 0.000
	m + 4	0.016 ± 0.003
	m + 5	0.008 ± 0.001
	m + 6	0.081 ± 0.003

^aThe mass fractions were corrected for the natural isotopes of hydrogen and oxygen.

^bIntracellular metabolite surrounding the g6p node.