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Table 2 Viable cell count and sporulation efficiency of different strains in LB medium

From: Optimization of alkaline protease production by rational deletion of sporulation related genes in Bacillus licheniformis

Time/h

BL Δupp

BL ΔF

BL ΔE

BL ΔA

cfu/mL

spo rate/%

cfu/mL

spo rate/%

cfu/mL

spo rate/%

cfu/mL

spo rate/%

12

7.9 × 108

0

7.7 × 108

0

8.1 × 108

0

2.4 × 109

0

24

2.6 × 109

31.3

2.5 × 109

0

2.5 × 109

0

4.2 × 109

0

36

2.7 × 109

88.2

2.4 × 109

0

2.5 × 109

0

2.3 × 109

0

48

1.6 × 109

97.8

9.3 × 106

0

1.1 × 107

0

1.5 × 107

0

60

1.4 × 109

100.0

8.5 × 105

0

8.7 × 105

0

8.1 × 105

0

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Microbial Cell Factories

ISSN: 1475-2859

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