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Table 2 Inhibitory effects of compounds 18 on bacterial α-glucosidase

From: Anti-hyperglycemic activity of polyphenols isolated from barnyard millet (Echinochloa utilis L.) and their role inhibiting α-glucosidase

Compounds

α-glucosidase (S. cerevisae)

IC a50 (μM)

Kinetic mode (K i, μM)b

1

1.3 ± 0.1

Noncompetitive (1.9 ± 0.4)

2

14.1 ± 1.2

Noncompetitive (2.3 ± 1.1)

3

74.8 ± 2.3

Noncompetitive (77.8 ± 1.8)

4

>100

NTc

5

17.8 ± 1.3

Noncompetitive (26.8 ± 1.3)

6

>100

NT

7

21.6 ± 1.8

Noncompetitive (18.2 ± 0.9)

8

>100

NT

Acarbose

255.1 ± 15.6

NT

DNJ

2.5 ± 0.1

NT

  1. NT is not tested, DNJ deoxynojirimycin
  2. aAll compounds were examined in a set of experiments repeated three times; IC50 values of compounds represent the concentration that caused 50 % enzyme activity loss
  3. bValues of inhibition constant