A7130

β-Amylase from barley

Type II-B, 20-80 units/mg protein (biuret)

• Synonym(s): 1,4-α-D-Glucan maltohydrolase
• CAS Number: 9000-91-3
• UNSPSC Code: 12352204
• NACRES: NA.54
• EC Number: 232-566-1
• MDL number: MFCD00081391
• EC Number: 3.2.1.2 (BRENDA, IUBMB)
• Specific activity: 20-80 units/mg protein (biuret)

Properties

• type: Type II-B
• Quality Segment: 200
• form: powder
• specific activity: 20-80 units/mg protein (biuret)
• greener alternative product characteristics: Waste Prevention; Design for Energy Efficiency; Learn more about the Principles of Green Chemistry.
• sustainability: Greener Alternative Product
• greener alternative category: , Enabling
• shipped in: wet ice
• storage temp.: 2-8°C

Description

General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency and waste prevention when used in starch ethanol research. For more information see the article in biofiles.

Application

β -Amylase is used to hydrolyze α bonds of α-linked polysaccharides, such as starch and glycogen. β -Amylase, has been used in various plant studies, such as carbon starvation studies in Populus tremuloides . β -Amylase, from barley, has been used to study how pressure and temperature affect catalytic activity .

Biochem/physiol Actions

β-Amylase hydrolyzes the α-(1,4) glucan linkages in polysaccharides of three or more α-(1,4) linked D-glucose units. Natural substrates such as starch and glycogen are broken down into glucose and maltose. Pure, crystalline β-amylase preparation consists of four isoenzymes with different isoelectric points. The enzyme polymerizes very rapidly through the sulfhydryl groups in the absence of reducing agents. p-Chloromercuribenzoate inhibits the polymerization and the enzymatic activity. The reducing agents mercaptoethanol or dithiothreitol can completely restore the activity.

Analysis Note

Crude

Other Notes

One unit will liberate 1.0 mg of maltose from starch in 3 min at pH 4.8 at 20 °C.

View more information on enzymes for complex carbohydrate analysis at www.sigma-aldrich.com/enzymeexplorer

Safety Information

• pictograms: GHS08
• signalword: Danger
• hcodes: H334
• pcodes: P261 - P342 + P311
• Hazard Classifications: Resp. Sens. 1
• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves