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Merck
모든 사진(5)

주요 문서

A7130

Sigma-Aldrich

β-Amylase from barley

greener alternative

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

동의어(들):

1,4-α-D-Glucan maltohydrolase

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About This Item

CAS Number:
효소 위원회 번호:
EC Number:
MDL number:
UNSPSC 코드:
12352204
NACRES:
NA.54

유형

Type II-B

Quality Level

양식

powder

특이 활성도

20-80 units/mg protein (biuret)

환경친화적 대안 제품 특성

Waste Prevention
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

sustainability

Greener Alternative Product

환경친화적 대안 카테고리

배송 상태

wet ice

저장 온도

2-8°C

유사한 제품을 찾으십니까? 방문 제품 비교 안내

일반 설명

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.

애플리케이션

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 .

생화학적/생리학적 작용

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.

품질

Crude

단위 정의

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

픽토그램

Health hazard

신호어

Danger

유해 및 위험 성명서

예방조치 성명서

Hazard Classifications

Resp. Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

개인 보호 장비

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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시험 성적서(COA)

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문서 라이브러리 방문

Volker Heinz et al.
Biotechnology progress, 21(6), 1632-1638 (2005-12-03)
The depolymerization of starch by beta-amylase during exposure to hydrostatic pressure up to 700 MPa and within a temperature range from 20 to 70 degrees C has been investigated. Inactivation of the enzyme as well as alterations in conversion speed
Purification and characterisation of crystalline -amylase from barley.
K Visuri et al.
European journal of biochemistry, 28(4), 555-565 (1972-08-04)
Xin Li et al.
Journal of industrial microbiology & biotechnology, 38(11), 1837-1843 (2011-04-21)
A moderately halophilic strain LY9 with high amylolytic activity was isolated from soil sample obtained from Yuncheng, China. Biochemical and physiological characterization along with 16S rRNA sequence analysis placed the isolate in the genus Halobacillus. Amylase production started from the
Déborah LeCorre et al.
Biomacromolecules, 13(1), 132-137 (2011-12-03)
Starch nanocrystals (SNCs) are crystalline platelets resulting from the acid hydrolysis of starch. A limiting factor for their more widespread use is their preparation duration. Therefore, this study investigates the possibility of developing an enzymatic pretreatment of starch to reduce
Ambarish Nag et al.
BMC systems biology, 5, 94-94 (2011-06-21)
Higher plants and algae are able to fix atmospheric carbon dioxide through photosynthesis and store this fixed carbon in large quantities as starch, which can be hydrolyzed into sugars serving as feedstock for fermentation to biofuels and precursors. Rational engineering

프로토콜

Enzymatic Assay of β-AMYLASE (EC 3.2.1.2)

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