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Table 1 Specific activities of glycosyl hydrolases from G. dipsosauri strain DD1

From: Characterization of β-galactosidase and α-galactosidase activities from the halophilic bacterium Gracilibacillus dipsosauri

Substrate

Specific activity (μmoles min−1 (mg protein)−1)

Crude extract

50 to 80% NH4(SO4)2 fraction

β-ONP-galactose

1.11 + 0.07

2.27 + 0.03

(o-nitrophenyl-β-d-galactopyranoside)

(2-nitrophenyl-β-d-galactopyranoside)

β-PNP-galactose

0.71 + 0.02

1.30 + 0.04

(p-nitrophenyl-β-d-galactopyranoside)

(4-nitrophenyl-β-d-galactopyranoside)

α-ONP-galactose

2.85 + 0.21

4.55 + 0.10

(o-nitrophenyl-α-d-galactopyranoside)

(2-nitrophenyl-α-d-galactopyranoside)

α-PNP-galactose

1.54 + 0.01

2.78 + 0.04

(p-nitrophenyl-α-d-galactopyranoside)

(4-nitrophenyl-α-d-galactopyranoside)

β-PNP-glucose

0.026 + 0

0.049 + 0.008

(p-nitrophenyl-β-d-glucopyranoside)

(4-nitrophenyl-β-d-glucopyranoside)

α-ONP-glucose

0.015 + 0.001

0.029 + 0.001

(o-nitrophenyl-α-d-glucopyranoside)

(2-nitrophenyl-α-d-glucopyranoside)

α-PNP-arabinose

0.160 + 0.003

0.285 + 0.001

(p-nitrophenyl-α-l-arabinopyranoside)

(4-nitrophenyl-α-l-arabinopyranoside)

  1. Specific activities are the means + one standard deviation of the three replicate assays with each substrate from one of several independent experiments