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Merck

A6680

Sigma-Aldrich

N-Acetylneuraminic Acid Aldolase from microorganisms

lyophilized powder, ≥20 units/mg protein (biuret)

别名:

N-Acetylneuraminate Pyruvate Lyase, N-Acetylneuraminic Acid Lyase, NANA Aldolase, Sialic Aldolase

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About This Item

CAS号:
Beilstein:
2697172
MDL號碼:
分類程式碼代碼:
12352204
NACRES:
NA.32

形狀

lyophilized powder

品質等級

比活性

≥20 units/mg protein (biuret)

分子量

~98 kDa

儲存溫度

−20°C

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應用

This enzyme is useful for enzymatic determination of N-acetylneuraminic acid and sialic acid when
coupled with the related enzymes in clinical analysis.
For industrial use, this enzyme is useful for enzymatic synthesis of sialic acid.
Used in the Sialic Acid Quantification Kit, SIALIC-Q

物理性質

Isoelectric point: 4.6 ± 0.1
Michaelis constant: 2.5 x 10‾3M (N-Acetylneuraminic acid)
Structure: 3 subunits (approx. 35,000) per mol of enzyme
Inhibitors: p-Chloromercuribenzoate, sodium dodecyl sulfact, Hg++, Ag+
Optimum pH: 7.5– 8.0
Optimum temp: 70°C
pH Stability: pH 6.0–9.0 (10°C, 25hr)
Thermal stability: Below 65°C (pH 7.5, 30 min)

單位定義

One unit will release 1.0 μmole of pyruvate from NANA per min at pH 7.7 at 37 °C.

外觀

Lyophilized powder containing mannitol and EDTA

儲存類別代碼

10 - Combustible liquids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)


历史批次信息供参考:

分析证书(COA)

Lot/Batch Number

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Vera Zimmermann et al.
Applied microbiology and biotechnology, 76(3), 597-605 (2007-07-03)
In this work, a model describing the complete enzyme catalysed synthesis of N-acetylneuraminic acid (Neu5Ac) from N-acetyl-D-glucosamine (GlcNAc) is presented. It includes the combined reaction steps of epimerisation from GlcNAc to N-acetyl-D-mannosamine (ManNAc) and the aldol condensation of ManNAc with
Wen-liu Yang et al.
Zhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University. Medical sciences, 39(1), 57-63 (2010-02-23)
To obtain the Escherichia coli strains expressing N-Acetyl-D-neuraminic acid aldolase (Neu5Ac aldolase). The gene (nanA) coding Neu5Ac aldolase was cloned from Escherichia coli C600, and the recombinant plasmid was sequenced and expressed in Escherichia coli. Sequencing data revealed that the
Jozef Nahálka et al.
Journal of biotechnology, 134(1-2), 146-153 (2008-03-04)
The propensity of a recombinant protein produced in bacteria to aggregate has been assumed to be unpredictable, and inclusion bodies have been thought of as wasted cell material. However, a target protein can be purposely driven to inclusion bodies, which
Yanhong Li et al.
Applied microbiology and biotechnology, 79(6), 963-970 (2008-06-04)
Sialic acid aldolases or N-acetylneuraminate lyases (NanAs) catalyze the reversible aldol cleavage of N-acetylneuraminic acid (Neu5Ac) to form pyruvate and N-acetyl-D: -mannosamine (ManNAc). A capillary electrophoresis assay was developed to directly characterize the activities of NanAs in both Neu5Ac cleavage
Hee Gon Jeong et al.
Infection and immunity, 77(8), 3209-3217 (2009-06-03)
N-acetylneuraminic acid (Neu5Ac, sialic acid) could provide a good substrate for enteropathogenic bacteria in the intestine, when the bacteria invade and colonize in human gut. In order to analyze the role of Neu5Ac catabolism in Vibrio vulnificus pathogenesis, a mutant

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