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. 2014 Feb 15;70(Pt 3):708–719. doi: 10.1107/S1399004713032446

Table 2. Kinetic parameters for the interaction of phosphonate X with and variants of A17.

  Phosphonate X Paraoxon
  k 2 (min1) K d (M) k 2/K d (M 1min1) G (kcalmol1) H (kcalmol1) S (calmol1 K1) E a (kcalmol1) k 2/K d (M 1min1)
A17 0.24 0.03 (120 15) 106 2000 500 6.5 0.1 4.1 0.3 4.0 1.2 12.5 1.3 1.2 0.5
A17 0.28 0.02 (130 15) 106 2200 400 6.5 0.1 3.0 0.4 7.6 1.8 11.4 0.5 1.6 0.6

E a is the activation-energy parameter.