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Table 7 Activation parameters for hydrolyses catalyzed by α-chymotrypsin

From: On the curvature in logarithmic plots of rate coefficients for chemical reactions

Substrate

a

Δu TS / kcal mol-1

σ

Suc-Phe-pNAa

133

(36.81)

1.62

(28.06)

94.58

(21.59)

5.61 10-2

(1.78 10-2)

0.85

(5.21 10-2)

Suc-Ala-Phe-pNA

221

(21.75)

0.31

(6.65 10-2)

143.24

(12.60)

3.24 10-2

(1.26 10-2)

0.93

(1.05 10-2)

Suc-Ala-Ala-Pro-Phe-pNA

157

(36.31)

8.22 102

(2.94 103)

103.56

(20.94)

6.16 10-2

(1.90 10-2)

0.91

(3.43 10-2)

  1. Standard deviations are given in parentheses.
  2. a pNA = p-nitroanilide