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Table 5 Substrate specificity of β-galactosidase partially purified from Aspergillus niger

From: Optimization and partial purification of beta-galactosidase production by Aspergillus niger isolated from Brazilian soils using soybean residue

Substratea Activity (UI/mL)b
ONPG 22.125 ± 0.018
Lactose 5.622 ± 0.002
CM-cellulose 0.253 ± 0.004
ρNPG 0.043 ± 0.005
  1. aONPG: o-nitrophenol-β-d-galactopyranoside; ρNPG: ρ-nitrophenol-β-d-galactopyranoside; CM-cellulose: carboxymethyl celulose; Lactose: β-d-galactopyranosyl-(1→4)-d-glucose
  2. bOne unit (U) of β-galactosidase activity was defined as the amount of the enzyme catalyzing the release of 1 µmol of o-nitrophenol per min at 410 nm (Nagy et al. 2001)
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