Thermostable Beta-Galactosidase from Thermus brockianus

SKU: bgal112 Category:


bgal112A thermostable β-galactosidase that hydrolyses terminal, non-reducing β-D-galactose residues in β-D-galactosides. From the thermophilic bacterium Thermus brockianus.


Available as 1000 units. Shipping within a week, shipping and handling charges additional to price below.

Product :

Bgal112 | Beta-Galactosidase 100 Units | Price : 310.00 EUR

Bgal112 | Beta-Galactosidase 500 Units | Price : 990.00 EUR

For further information read more below or download the product sheet



Mode of action: The enzyme hydrolyses terminal, non-reducing b-D-galactose residues in b-D-galactosides.

Unit Definition: One unit (U) is defined as the amount of enzyme which  liberates 1 mmol of p-nitrophenol per min from pNP-b-galactoside, under  the given assay conditions.

Unit Assay Conditions:  The standard assay for cellulase activity was done by incubating the enzyme at 80°C for 10 min, with 1 % (w/v) pustulan, as a substrate in 0.1M sodium phosphate buffer, pH 5,5. The reducing sugars released were detected by the dinitrosalicylic acid method using glucose as standard.


Enzyme properties:

Bgal112 Beta-Galactosidase activity vs. temperature

Temperature Optimum: The enzyme activity is limited below 65°C but increases with temperature up to 100°C



pH Optimum: pH range is about 4-7 with optimum around 6.5


 Thermostability: The ß-galactosidase heat stability at 70,80 and 91°C


Additional information

Unit size and price

100 units – EUR 310, 500 units – EUR 990