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Table 1 Kinetic parameters for cellobiose hydrolysis by β-glucosidases

From: Selecting β-glucosidases to support cellulases in cellulose saccharification

 

kcat(h)(s-1)a

KM(h) (mM)a

t (°C)

N188BG

TaBG3

AtBG3

N188BG

TaBG3

AtBG3

25

121 ± 4 (70%)

227 ± 10 (57%)

105 ± 11 (95%)

0.73 ± 0.04

0.42 ± 0.03

0.29 ± 0.07

35

271 ± 5 (72%)

401 ± 19 (57%)

180 ± 11 (92%)

0.97 ± 0.04

0.51 ± 0.04

0.32 ± 0.04

45

493 ± 12 (70%)

632 ± 20 (61%)

326 ± 14 (81%)

1.34 ± 0.06

0.60 ± 0.03

0.41 ± 0.04

55

691 ± 27 (76%)

1058 ± 81 (60%)

666 ± 23 (66%)

1.36 ± 0.12

0.67 ± 0.10

0.87 ± 0.05

65

 

1497 ± 53 (67%)

968 ± 31 (71%)

 

0.82 ± 0.06

0.93 ± 0.06

  1. The values in parentheses show the highest measured value of the rate constant for cellobiose hydrolysis as a percentage of kcat(h).
  2. aThe values of kcat(h) and KM(h) were determined by a non-linear regression analysis of the data of cellobiose turnover, according to Equation 2.