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Table 3 Comparison of ethanol productivity from PASC for several cellulase-expression systems in S. cerevisiae

From: Direct ethanol production from cellulosic materials using a diploid strain of Saccharomyces cerevisiaewith optimized cellulase expression

Strain

Cellulase expression

Initial PASC concentration, g/l

Maximum ethanol production, g/l

Maximum ethanol reaching time, hours

Ethanol yield of the theoretical yield from initial cellulose, %1

Time and effort

Reference

S. cerevisiae 2

Cell surface display

10

2.9

40

57

Triple yeast transformation

[3]

S. cerevisiae

Secretion

10

1.0

192

20

Single yeast transformation

[2]

S. cerevisiae and E. coli3

Minicellulosome constructed by E. coli produced cellulases

10

3.5

48

69

Single yeast transformation, cellulase production by E. coli, and immobilization

[4]

S. cerevisiae

Minicellulosome

10

1.8

70

35

Double yeast transformation

[5]

S. cerevisiae

Cell surface display in optimum ratio

20

3.1

72

30

Triple yeast transformation

This study

S. cerevisiae

Cell surface display in optimum ratio with diploidization

20

7.6

72

75

Triple yeast transformation and diploidization

This study

  1. 1Calculated from each result.
  2. 2Saccharomyces cerevisiae.
  3. 3Escherichia coli.