Similarities and differences between alpha amylase and beta amylase

Similarities and differences between alpha amylase and beta amylase

Alpha-amylase:

Is an endoglucanase that acts randomly on the α-1,4 glycosidic bond inside the starch chain.

The degradation of amylose products is glucose, maltose, maltotriose.

Degraded amylopectin products are glucose, maltose, maltotriose and alpha-limit dextrin.

Beta-amylase:

It is an exoglucosidase that cuts α-1,4 glycosidic bonds from the non-reducing end of starch and removes the disaccharide units one by one. The original α-linked is transformed and the product is β-maltose, so this enzyme is called Beta-amylase.

When it degrades amylopectin or glycogen, the product is maltose and beta-limit dextrin

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product name

specification

package

price

Peak alpha-amylase

BR, 4000u/g

250g

252.00

High temperature alpha-amylase

BR, 20,000 u/ml

50ml

120.00

High temperature alpha-amylase

BR, 20,000 u/ml

100ml

168.00

Alpha-amylase (Aspergillus oryzae)

100,000 U/g

5g

130.00

Alpha-amylase (Aspergillus oryzae)

100,000 U/g

25g

454.00

Alpha-amylase (Aspergillus oryzae)

100,000 U/g

100g

1546.00

Alpha-amylase (Bacillus subtilis)

BR, 4000u/g

250g

144.00

Alpha-amylase (porcine pancreas)

≥10u/mg solid

50ku

216.00

Alpha-amylase (porcine pancreas)

≥10u/mg solid

250ku

670.00


Comparison of similarities and differences between α-amylase and β-amylase:

The same point: both act on α-1,4 glycosidic bonds, the products are all maltose. Different points: α-amylase β-amylase
1 can cross branch points and cannot cross branch points
2 endonuclease (random cut) end-resolving enzyme (non-reducing end two-two tangent)
3 product dextrin molecular weight small dextrin molecular weight (limit dextrin)
4 high temperature resistance, acid and acid resistance, high temperature resistance
5 Exist in the germinating seeds

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