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Table 3 Inhibition constants of anionic inhibitors against various CAs

From: Characterization of the first beta-class carbonic anhydrase from an arthropod (Drosophila melanogaster) and phylogenetic analysis of beta-class carbonic anhydrases in invertebrates

Inhibitor

  

K I [mM] #

  
 

HCA II

Nce103

ScCA

CgCA

DmBCA

F -

>300

0.69

2.85

0.36

0.80

Cl -

200

0.85

0.85

0.58

0.97

Br -

63

0.94

0.0108

27

1.04

I -

26

1.40

0.0103

42.4

1.18

CNO -

0.03

1.18

31.7

0.60

0.73

SCN -

1.6

0.65

55.6

0.73

1.28

CN -

0.02

0.011

16.8

1.12

0.67

N 3 -

1.5

0.52

27.9

1.03

1.12

HCO 3 -

85

0.62

0.78

0.086

26.9

NO 3 -

35

0.69

13.9

0.097

43.7

NO 2 -

63

0.53

0.46

0.088

28.6

HS -

0.04

0.37

0.33

0.10

1.01

HSO 3 -

89

0.54

0.33

0.10

1.29

SO 4 2-

>200

14.15

0.58

0.58

1.36

ClO 4 -

>200

>200

>200

>200

>200

H 2 NSO 2 NH 2

1.13

0.30

0.0087

0.42

0.15

H 2 NSO 3 H §

0.39

0.70

0.84

0.11

2.45

Ph-B(OH) 2

23.1

30.8

38.2

0.10

22.4

Ph-AsO 3 H 2 §

49.2

30.8

0.40

0.098

32.6

  1. Inhibition constants against isozymes HCA II (α-CA class), and the β-CAs Nce103 (from C. albicans), ScCA (from S. cerevisiae), CgCA (from C. glabrata) and DmBCA (D. melanogaster) for the CO2 hydration reaction at 20°C are shown.
  2. §As sodium salt.
  3. # Errors in the range of 5-10% of the shown data, from three different assays, by a CO2 hydration stopped-flow assay.