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. Author manuscript; available in PMC: 2014 Jun 24.
Published in final edited form as: Free Radic Res. 2014 Feb 24;48(4):487–502. doi: 10.3109/10715762.2014.886775

Table IV.

Estimated rate constants for the unified GPx kinetic model for different experimental data sets.

Carsol et al. [39]
Value
Value
Parameter Value Sensitivity Parameter pH = 7.0 pH = 7.7 Parameter pH = 7 pH = 7.7
k1f (M−1 s−1) 2.2 × 105 0.53 Vf (s−1)a 4.46 4.46 Φ0(s)a 0.22 0.22
k1r (s−1) 9.8 × 107 0.41 KmA (M) 0.1 (2.5) 2.5 Φ1 (M. s)a 4.4 × 10−6 4.4 × 10−6
k2f (M−1 s−1) 1.3 × 108 0.41 KmA1 (M) 35 × 10−6 832 × 10−6 Φ2 (M. s) 1.5 × 10−3 3.2 × 10−4
k2r (s−1) 3.6 × 103 0.17 KmA2 (M)a 20 × 10−6 20 × 10−6 Φ12 (M2. s) 5.4 × 10−8 2.7 × 10−7
k3f (M−1 s−1) 4 × 104 0.42 KmB1 (M) 0.45 × 10−6 2.27 × 10−6 Φ22 (M2. s) 6.9 × 10−10 7.3 × 10−10
k3r (s−1)b 4.0 × 10−33 N/A KmB2 (M) 6.8 × 10−3 1.45 × 10−3 Φ122 (M3. s) 7.4 × 10−11 1.8 × 10−9
k4f (s−1) 4.47 0.32 KiB1 (M) 1.3 × 10−3 6.9 × 10−3
k4r (M−1 s−1) 4.1 × 102 0.32 KiB2 (M) 12 × 10−3 60 × 10−3
KH (M) 1.5 × 10−9 N/A KmP(M) 10 × 10−3 10 × 10−3
Keq (M−2) 9.0 × 1036 N/A Vr (s−1) 0 0

N/A: Not applicable as they are fixed parameters.

a

Independent of pH.

b

Parameter was calculated based on the thermodynamic constraint.