All Photos(3)



β-Amylase from sweet potato

greener alternative

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

1,4-α-D-Glucan maltohydrolase
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:

Quality Level


Type I-B


ammonium sulfate suspension

specific activity

≥750 units/mg protein (E1%/280)

greener alternative product score

old score: 57
new score: 1
Find out more about DOZN™ Scoring

greener alternative product characteristics

Waste Prevention
Safer Solvents and Auxiliaries
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.


≥7.0 mg/mL

greener alternative category


storage temp.


Looking for similar products? Visit Product Comparison Guide

General description

β-Amylases belongs to the class of amylolytic enzymes.
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.


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.
β-Amylase from sweet potato has been used:
  • in the hydrolysis of starch and starch-pectin combinations
  • for comparing amylases from different sources in Staphylococcus aureus SH1000 biofilm inhibition and reduction assay
  • for selenium speciation in samples


10000, 25000, 50000, 100000 units in glass bottle

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.
β-Amylases plays a major role in examining enzymatic promiscuity among glycosidases.

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


Health hazard

Signal Word


Hazard Statements

Precautionary Statements

Hazard Classifications

Resp. Sens. 1

Storage Class Code

13 - Non Combustible Solids

WGK Germany


Certificate of Analysis

Certificate of Origin

Mechanisms of enzymatic glycosyl transfer
Comprehensive Natural Products II (2010)
Effect of cross-linking on the resistance to enzymatic hydrolysis of waxy maize starch and low-methoxy pectin
Khondkar D, et al.
Food Hydrocolloids, 23(2), 387-393 (2009)
Xin Qi et al.
Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques, 14(1), 60-66 (2011-04-20)
β-Limit dextrin has been studied for many years as a means to investigate the internal structures of amylose and amylopectin. However its role as an excipient in the pharmaceutical industry has never been reported. This paper is the first one...
C G Cheong et al.
Proteins, 21(2), 105-117 (1995-02-01)
Sweet potato beta-amylase is a tetramer of identical subunits, which are arranged to exhibit 222 molecular symmetry. Its subunit consists of 498 amino acid residues (Mr 55,880). It has been crystallized at room temperature using polyethylene glycol 1500 as precipitant....
William R L Anderegg et al.
Plant physiology, 159(4), 1866-1874 (2012-06-06)
Drought impacts on forests, including widespread die-off, are likely to increase with future climate change, although the physiological responses of trees to lethal drought are poorly understood. In particular, in situ examinations of carbon starvation and its interactions with and...


How to Work with Enzymes Supplied as Ammonium Sulfate Suspensions

Instructions for working with enzymes supplied as ammonium sulfate suspensions


Enzymatic Assay of β-AMYLASE (EC

Enzymatic Assay of β-AMYLASE (EC

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service