The protein content and enzymatic activity are determined on a lot to lot basis. Each value is reported in the specific Certificate of Analysis. The protein content range is 5 - 15% and the enzymatic activity range is 300 - 1500 units per milligram protein. A review of recent lots indicates typical protein concentrations of 7 - 13% and activities of 1350 - 1450 units per milligram protein. Please see the link below to review a sample or lot specific Certificate:
https://www.sigmaaldrich.com/product/sigma/a1031#product-documentation
A1031
α-Amylase from human saliva
Type XIII-A, lyophilized powder, 300-1,500 units/mg protein
Synonym(s):
1,4-α-D-Glucan-glucanohydrolase
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1000 UNITS
$170.00
5000 UNITS
$596.00
About This Item
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type
Type XIII-A
Quality Level
form
lyophilized powder
specific activity
300-1,500 units/mg protein
composition
Protein, 5-15% biuret
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UniProt accession no.
greener alternative category
storage temp.
−20°C
Gene Information
human ... AMY1A(276)
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1 of 4
This Item | A0521 | A6380 | 10069 |
|---|---|---|---|
| Gene Information human ... AMY1A(276) | Gene Information human ... AMY1A(276) | Gene Information - | Gene Information - |
| specific activity 300-1,500 units/mg protein | specific activity 1,000-3,000 units/mg protein | specific activity ≥1,500 units/mg protein (biuret) | specific activity ~380 U/mg |
| form lyophilized powder | form lyophilized powder | form lyophilized powder | form powder |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. 2-8°C |
| UniProt accession no. | UniProt accession no. | UniProt accession no. - | UniProt accession no. - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 100 |
General description
Human α-amylase is made up of 496 amino acids in a single polypeptide chain, which is encrypted on chromosome 1. These are produced either in the salivary glands or the pancreas. The salivary and pancreatic α-amylases have homologous primary sequence but exhibit different cleavage patterns.[1]
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
α-Amylase is used to hydrolyze α bonds of α-linked polysaccharides, such as starch and glycogen. Product A1031 is from human saliva, is type IIA, and is supplied as a lyophilized powder. α-Amylase has been used in various plant studies, such as metabolism studies in Arabidopsis [2]. α-Amylase from human saliva has been used to study the development of nutraceuticals, which may aid the treatment of diabetes and obesity [3].
Biochem/physiol Actions
α-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.[4]
Unit Definition
One unit will liberate 1.0 mg of maltose from starch in 3 min at pH 6.9 at 20 °C.
Physical form
Lyophilized powder containing (NH4)2SO4, sodium citrate and sodium chloride.
Other Notes
View more information on enzymes for complex carbohydrate analysis at www.sigma-aldrich.com/enzymeexplorer
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signalword
Danger
hcodes
pcodes
Hazard Classifications
Resp. Sens. 1
Storage Class
11 - Combustible Solids
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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Certificates of Analysis (COA)
Lot/Batch Number
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Customers Also Viewed
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Considering the wide range of activity range, how can I be sure of the enzyme activity of the specific batch that I receive?
1 answer-
Helpful?
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¿Cómo se reconstituye la enzima al venir liofilizada? ¿Qué tasa de actividad tiene?
1 answer-
For assay purposes, this enzyme is reconstituted in water at 1 u/mL. This material is also soluble in 1 mM Calcium Chloride. The activity specification is 300 - 1500 U/mg. The unit per milligram value is reported in the lot-specific Certificate of Analysis and will range from 0.67 to 3.3 mg for the 1000 U pack size. Please see the link below to review a sample or lot specific Certificate:
https://www.sigmaaldrich.com/product/sigma/a1031#product-documentationHelpful?
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Hi, could you let me know what the remaining composition is when the product contains 5-15% protein? Thank you!
1 answer-
As mentioned in the 'DESCRIPTION' section, this product is a lyophilized powder containing (NH4)2SO4, sodium citrate and sodium chloride. This product is not tested for purity. However, buffer salts are expected to be the bulk of the non-protein content.
Helpful?
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Please let me know the storage temperature and storage period when it is dissolved in water
1 answer-
The stability of this material in solution has not been investigated. However, various sources suggest that solutions may be stored in working aliquots at -20°C for several months.
Helpful?
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What is the recommended method for dissolving alpha amylase obtained from human saliva, specifically A1031?
1 answer-
The recommended method is to dissolve the enzyme in 1mM calcium chloride (CaCl2).
Helpful?
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