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Table 1 Correlation between enzymatic flux magnitude and evolutionary constraint Ka/Ks

From: Influence of metabolic network structure and function on enzyme evolution

Uptake

Maximum uptake rates (mmol/gDW/h)

Spearman's rank correlation (P value) with zero fluxes

Spearman's rank correlation (P value) without zero fluxes

Glucose/oxygen

15.3/2.4

-0.28 (P = 3.8 × 10-3)

-0.25 (P = 3.6 × 10-6)

Glucose/oxygen

15.3/0.2

-0.31 (P = 1.7 × 10-3)

-0.22 (P = 5.7 × 10-5)

Glucose/oxygen

15.3/0.01

-0.26 (P = 9.3 × 10-3)

-0.21 (P = 1.2 × 10-4)

Fructose/oxygen

15.3/6.0

-0.27 (P = 6.4 × 10-3)

-0.20 (P = 2.5 × 10-4)

Fructose/oxygen

15.3/0.2

-0.25 (P = 1.3 × 10-2)

-0.20 (P = 1.8 × 10-6)

Acetate/oxygen

10.0/2.4

-0.08 (P = 0.45)

-0.21 (P = 9.2 × 10-5)

Acetate/oxygen

5.0/5.0

-0.010 (P = 0.39)

-0.19 (P = 3.7 × 10-4)

  1. The correlation between enzymatic flux magnitude and evolutionary constraint Ka/Ks was calculated with and without enzymes carrying zero fluxes. gDW, grams dry weight.