Native Escherichia coli β-Galactosidase
8 Inquiries
9031-11-2
2026-07-27
Coenzymes,Inhibito,Enzymes,Zymogens,Substrates,Native Microorganism Creatine Amidinohydrolase
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Product Description
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Seller Information
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Inquiry History
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Description
ProductName Native Escherichia coli β-Galactosidase Cat No DIA-189 Description β-galactosidase, also called beta-gal or β-gal, is a hydrolase enzyme that catalyzes the hydrolysis of β-galactosides into monosaccharides. Substrates of different β-galactosidases include ganglioside GM1, lactosylceramides, lactose, and various glycoproteins. Abbr GLB (E. coli) Alias β-gal; GLB Source Escherichia coli Applications This enzyme is useful for structural investigation of carbohydrates, the determination of lactose (foodstuff analysis) and as an enzyme label for enzyme immunoassay. Appearance White amorphous powder, lyophilized. Form Freeze dried powder Enzyme Commission Number EC 3.2.1.23 Activity GradeⅡ 500U/mg-solid or more CAS No 9031-11-2 Contaminants α-galactosidase < 1×10⁻⁴% α-glucosidase < 1×10⁻⁴% ß-glucosidase < 2×10⁻³% α-mannosidase < 1×10⁻⁴% ß-mannosidase < 1×10⁻⁴% proteinase < 10mAbs/mg-P Molecular Weight 540 kDa Isoelectric point 4.61 pH Stability pH 6.5-8.5 (25°C, 20hr) Michaelis Constant 3.0×10⁻⁴M (o-Nitrophenyl-ß-D-galactoside), 6.7×10⁻⁵M (p-Nitrophenyl-ß-D-galactoside), 2.3×10⁻⁴M (Phenyl-ß-D-galactoside), 2.5×10⁻³M (Lactose) Structure The enzyme is composed of four identical subunits having a molecular weight of ca.135,000. The amino acid analysis indicates approximately 1,170 residues per subunit. Specificity The enzyme specifically hydrolyzes ß-D-galactosyl linkage Optimum pH 7.0-7.5 Optimum temperature 50-55°C Thermal stability below 50°C (pH 7.3, 15min) Stability Stable at-20°C for at least 6 months Stabilizers Mg⁺⁺ Inhibitors p-Chloromercuribenzoate, lodoacetamide, heavy metal ions (Zn⁺⁺, Fe⁺⁺⁺, Cd⁺⁺, Cu⁺⁺, Pb⁺⁺, Ag⁺, Hg⁺⁺), lonic detergents (SDS, DAC, etc.) Synonyms β-galactosidase; beta-gal; β-gal; EC 3.2.1.23; lactase; β-lactosidase; maxilact; hydrolact; β-D-lactosidase; S 2107; lactozym; trilactase; β-D-galactanase; oryzatym; sumiklat; β-D-galactoside galactohydrolase category Enzymes and Coenzymes Drugs(c1513) cas_num 9031-11-2 Basic Info-
Product Name:
β-Galactosidase
Other Name:β-Galactosidase;Galactosidase,β-;Lactase;E.C. 3.2.1.23;β-Lactosidase;Maxilact;Hydrolact;β-D-Lactosidase;S 2107;β-D-Galactoside galactohydrolase;β-L-Galactanase;Tilactase;Oryzatym;Sumiklat;p-Nitrophenyl β-galactosidase;Lactosylceramidase II;β-D-Galactopyranosidase;Lactozyme;Biolacta;Lactokanescin G 20x;LX 5000;Lactase P;Lactase F;Lactase Y-AO;β-Galactanase;Sumylact GLL;Biolacta FN 5;Fungal lactase 30,000;Lactozyme 3000L;Galantase;Lactaid;Neutralact;Sumylact L;Maxilact LX 5000;Lactoles;Maxilact L 2000;Gamma-lactase A50P;γ-Lactase A 50P;Lactozym 3000 lactase;Biolactase L;Maxilact 2000;Lactase L107P;Lactase Y "Amano" L;Sumilacto L;Biolacta N 5;Lactozym 2000L;Ha-Lactase;Lacdigest;Godo YNL2;Deerland 100K lactase;Lacteeze;Godo YNL 10000;Godo YNL 2 Lactase;Lactozym Pure 6500L;Biolactase NTL-CONC;Sumylact LL;Enzeco fungal lactase;Tolerase;NTL 3000;Biolactasa NL;Enzeco Lactase NL;Lactozyme Pure 2600L;LactoMax;GODO-YNL;121854-92-0
CAS No.:9031-11-2
InChIKeys:WQZGKKKJIJFFOK-FPRJBGLDSA-N
Molecular Weight:180.156
Exact Mass:340.203857
EC Number:232-864-1
HScode:35079090
Categories:
Characteristics-
PSA:
110
XLogP3:8.19
Appearance:slightly yellow powder
Density:1.14 g/cm3 @ Temp: 4 °C
Melting Point:100 °C
Boiling Point:100 °C @ Press: 800 Torr
Flash Point:256.9±21.9 °C
Refractive Index:1.572
Water Solubility:soluble in water;1% acetic acid: 1 mg/mL
Storage Conditions:2-8°C
Hazard IdentificationClassification of the substance or mixture
Respiratory sensitization, Category 1
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Danger
Hazard statement(s) H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
Precautionary statement(s) Prevention P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P284 [In case of inadequate ventilation] wear respiratory protection.
Response P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P342+P316 If experiencing respiratory symptoms: Get emergency medical help immediately.
Storage none
Disposal P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.
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Seller Information
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Business Type:
Manufactory
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Main Products:
Coenzymes,Inhibito,Enzymes,Zymogens,Substrates,Native Microorganism Creatine Amidinohydrolase
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Location:
Shirley, New York 11967, USA
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Payment Terms:
TT against copy of documents,D/P
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Average lead Time:
15
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Total Annual Revenue:
$1 million-$2.5 million
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Year of Establishment:
2004
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Inquiry History8 Inquiries
Country Product Purchase Quantity Date Posted 
France
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Mexico
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1 L May 9, 2025 
India
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30.00 KG Jan 5, 2024
India
Lactase (Enzyme)
8.00 TON Jun 11, 2024
India
Lactase F-100 Concentrate
10 MT Mar 21, 2024
India
Lactase F-100
10 MT Mar 20, 2024 
Russia
Lactase
8 KG Jan 30, 2025 
Turkey
Liquid Acid Lactase
1 20' Fcl Dec 28, 2023 Post an enquiry for this product
