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Table 1 Vitamin K2 content in quark samples

From: Long-chain vitamin K2 production in Lactococcus lactis is influenced by temperature, carbon source, aeration and mode of energy metabolism

No.a

Pre-culture

Quark

MK-7

MK-8

MK-9

MK-10

Total VK2

C sourceb

Aeration

C source

Temp.c (°C)

(ng/g of quark; means ± SEMsd)

A

Glucose

No

Glucose

20

0.8 ± 0.3

5.4 ± 0.8

36.7 ± 10.0

0.4 ± 0.1

44.9 ± 10.6

B

Glucose

No

Glucose

30

1.0 ± 0.3

16.0 ± 5.8

52.1 ± 8.6

1.5 ± 1.2

72.1 ± 12.9

C

Glucose

No

Fructose

30

1.0 ± 0.3

16.2 ± 2.2

64.8 ± 8.2

1.0 ± 0.5

85.0 ± 10.3

D

Fructose

No

Glucose

30

0.7 ± 0.2

7.5 ± 1.5

36.3 ± 10.4

1.8 ± 1.1

48.8 ± 13.0

E

Fructose

No

Fructose

30

2.0 ± 0.5

18.8 ± 5.2

59.9 ± 9.6

0.9 ± 0.4

84.4 ± 15.6

F

Fructose

Yes

Glucose

30

1.9 ± 0.3

15.9 ± 3.3

64.9 ± 5.8

1.4 ± 0.1

87.3 ± 9.1

G

Fructose

Yes

Fructose

30

1.7 ± 0.4

18.9 ± 4.8

88.1 ± 8.8

2.6 ± 1.1

113.8 ± 9.8

  1. aEach combination of cultivation condition was given a number for easy reference in the text
  2. bCarbon source
  3. cTemperature
  4. dAll conditions was tested in biological triplicates, except for B which was in duplicate