β-galactosidase

CAS：   

9031-11-2

Specific activity:  

≥ 400U/mg protein

Unit definition:   

One unit will cause the formation of one micromole of ONP from ONPG per min at pH 7.3 at 37℃.

Catalog No.:

DBACE0382B

Appearance:

White amorphous powder

Source:

Microorganism

Enzyme Commission Number:

EC 3.2.1.23

CAS Number:

9031-11-2

Storage temperature:

-20℃

Specific activity:

≥ 400U/mg protein

Unit definition:

One unit will cause the   formation of one micromole of ONP from ONPG per min at pH 7.3 at 37℃.

Molecular weight:

118 kDa (SDS-PAGE)

Isoelectric point:

4.6

Michaelis constant:

3.4×10^-4 M (O-Nitrophenyl-β-D-Galactoside)

Optimum pH:

7.0

Optimum temperature:

50℃

pH Stability:

5.5~9.5 (25℃,20hr)

Thermal stability:

< 45℃ (pH 7.3, 15min)

Inhibitors:

Co²⁺, Cu²⁺, Ni²⁺, Zn²⁺, Proclin