TABLE 5.

Relative molecular carbon flow into the PP pathway and catabolic PP pathway flux

Organism	Mean ± SD
	Flux into PP pathway (%)a	Catabolic PP pathway flux (%)b
Z. mobilis	0 ± 0	0 ± 0
P. fluorescens	10 ± 1	−2 ± 1c
S. melioti	4 ± 1	−2 ± 1
A. tumefaciens	6 ± 2	−1 ± 2
Paracoccus versutus	0 ± 2	−4 ± 2
R. sphaeroides	0 ± 5	−7 ± 5
E. coli	21 ± 4	12 ± 4
B. subtilis	38 ± 1	27 ± 1

^aCarbon flux into the PP pathway was calculated as the flux through 6-P-gluconate dehydrogenase divided by the total carbon uptake rate.

^bFor the catabolic PP pathway flux, the CO₂ production and precursor flux of erythrose-4-P and ribulose-5-P into biomass were subtracted from those of 6-P-gluconate dehydrogenase.

^cNegative values indicate reverse flux into the PP pathway from fructose-6-P and/or glyceraldehyde-3-P.