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Table 1  Evaluation of EC50 from bacterioruberin-DPPH interaction 

From: Kinetics of DPPH scavenging by bacterioruberin from Haloferax alexandrinus GUSF-1 (KF796625)

Log (M) [Bacterioruberin]

% DPPH RSA

Experiment No

Mean

SD

1

2

3

4

5

− 6.091

6.5*

7.1*

6.98*

7.2*

6.68*

6.89

0.29

− 5.966

9.8

9.2

9.21

9.5

9.7

9.48

0.27

− 5.869

13.65

14.02

14.61

14.8

13.76

14.16

0.51

− 5.568

25.47

23.44

24.32

24.8

23.2

24.24

0.94

− 5.267

36.48

38.98

37.65

38.8

36.6

37.70

1.17

− 5.091

42.7

43.21

44.52

42.8

44.6

43.56

0.92

− 4.966

57.7

59.8

60

58.6

60.2

59.26

1.07

− 4.869

66.78

68.9

70

68.4

72.2

69.25

2.01

− 4.693

75.29

75

79

78.2

76.4

76.77

1.76

− 4.568

80.77

81.77

81.23

82.4

80.6

81.35

0.74

− 4.471

93.82

94.22*

93.21

93.2

94.6*

93.81

0.61

− 4.392

93.87

92.11

93.22*

92.4

93.6

93.04

0.75

− 4.267

93.87*

93.12

92.23

93.4*

92.8

93.08

0.61

Log EC50

− 5.15

− 5.18

− 5.19

− 5.20

− 5.20

− 5.18

0.01

EC50[M]

6.93 × 10–6

6.60 × 10–6

6.45 × 10–6

6.26 × 10–6

6.28 × 10–6

6.50 × 10–6

0.27

EC50[µM]

6.93

6.60

6.45

6.26

6.28

6.50

0.27

  1. *Minimum and maximum responses used for computing the 50% maximal response
  2. The % DPPHRSA values are obtained from five independent experiments and results expressed as mean ± SD
  3. The Log [M] EC50 values for bacterioruberin is computed from Fig. 4a, b