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Table 2 Enzymes released by Aspergillus niger detected by the APY-ZYM® system

From: Characterization and optimization of extracellular enzymes production by Aspergillus niger strains isolated from date by-products

Enzymes

Strains

ASP2

ASP6

ASP28

ASP31

ASP32

Phosphatase alkaline

5

1

5

4

1

Esterase (C4)

5

2

5

4

2

Esterase lipase (C8)

5

2

5

4

1

Lipase (C14)

0

0

0

0

0

Leucine arylamidase

4

2

3

2

1

Valine arylamidase

2

0

0

0

0

Cystine arylamidase

0

0

0

0

0

Trypsin

0

0

0

0

0

Chymotrypsin

2

0

0

2

0

Phosphatase acid

5

5

5

4

4

Naphthol-AS-BI-phosphohydrolase

5

4

4

5

3

α-Galactosidase

2

1

0

1

0

β-Galactosidase

2

1

0

0

0

β-Glucuronidase

0

0

0

0

0

α-Glucosidase

3

1

2

2

0

β-Glucosidase

5

4

4

4

3

N-acetyl-β-glucosaminidase

4

5

4

4

3

α-Mannosidase

0

0

0

0

0

α-Fucosidase

0

0

0

0

0

  1. The scale of the API-ZYM® test was used for enzyme quantification, with 0=not detected activity, 1=5 nmol substrate metabolized, 2=10 nmol, 3=20 nmol, 4=30nmol, and 5 ≥40 nmol