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A7005 Sigma

β-Amylase from sweet potato Green Alternative

Type I-B, ammonium sulfate suspension, ≥750 units/mg protein (E1%/280)

Synonym: 1,4-α-D-Glucan maltohydrolase



Related Categories β-Amylase, 3.2.x.x Glycosidases, 3.x.x.x Hydrolases, Amylases, α-Glucosidase, Starches (Amylose and Amylopectin) and Glycogen, Application Index,
type   Type I-B
form   ammonium sulfate suspension
greener alternative product score   old score: 43
new score: 2
Find out more about DOZN™ Scoring.
greener alternative product characteristics   Waste Prevention
Less Hazardous Chemical Syntheses
Safer Solvents and Auxiliaries
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.
concentration   ≥7.0 mg/mL
greener alternative category   Enabling, Re-engineered
storage temp.   2-8°C


General description

Sigma Life Science is 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 waste prevention when used in starch ethanol research. For more information see the article in biofiles.

Other Notes

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


100000 units in glass bottle

Unit Definition

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

Physical form

Crystalline suspension in 2.3 M (NH4)2SO4


β -Amylase is used to hydrolyze α bonds of α-linked polysaccharides, such as starch and glycogen. β -Amylase, from Sigma, has been used in various plant studies, such as carbon starvation studies in Populus tremuloides. β-amylase from sweet potato has been used to examine the utility of the enzyme in inhibiting and removing Staphylococcus aureus biofilms. The enzyme has also been used to prepare β-limit dextrin from waxy maize starch.

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. β-amylase from sweet potato is a tetramer of identical subunits, which are arranged to exhibit 222 molecular symmetry.

Price and Availability

Safety & Documentation

Safety Information

GHS08  GHS08
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 
Protocols & Articles


Ammonium Sulfate Suspensions - Technical Note

Note that for an ammonium sulfate suspension, most of the enzyme will be in solid form. It is likely that only negligible amounts of enzyme will be in the ammonium sulfate solution.
Keywords: Enzyme activity


Enzymatic Assay of β-AMYLASE (EC

3.2. Unit Definition – One unit will liberate 1.0 mg of maltose from starch in 3 minutes at pH 4.8 at 20°C.
Keywords: Enzyme activity, Enzymology

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

Peer-Reviewed Papers


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