苹果酸脱氢酶(MDH)来源于栖热菌

CAS: 9001-64-3 货号: M139683 分子量: 70 kD EC号: 232-622-5
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级别和纯度: 生物活性 ? 生物活性级(Bioactive)—— 经验证在功能检测中保持生物活性。当分子须具有功能活性而不仅是纯度时使用。 ActiBioPure™ ? ActiBioPure™ —— 阿拉丁面向生物活性和重组产品的优质系列。当同时需要高纯度和保持生物活性时使用。 天然 ? 天然型(Native)—— 处于天然(非重组、非变性)形态的蛋白/生物分子。当需要天然结构和活性时使用。 高性能 ? 高性能级 —— 纯度和性能特性经过优化。适用于普通等级无法满足的灵敏分析。 EnzymoPure™ ? EnzymoPure™ —— 阿拉丁的高质量酶解决方案系列。当酶纯度和明确活性决定检测或工艺性能时使用。 ≥100 U/mg enzyme powder
Accession #
P10584
生物活性
≥100 U/mg enzyme powder
★
规格
库存
价格
数量
5KU
M139683-5KU
现货 Stock Image
¥680.90
25KU
M139683-25KU
现货 Stock Image
¥2,049.90
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储存与运输

2-8°C储存。低温运输 。请查阅批次 COA 获取详细规格。

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质量文档

SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。

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文献证明

在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。

概述


Malate dehydrogenase (MDH) catalyzes the mutual conversion of oxaloacetate and malate, and is associated with the oxidation/reduction of dinucleotide coenzymes.
ORIGIN: Thermus sp.
CATALYSIS: L-Malate + NAD⁺ ⇄ Oxaloacetate + NADH + H⁺
SPECIFICATIONS:
Activity (MDH-3): ≥100 U/mg enzyme powder
Appearance: White powder, lyophilized
Contaminants:
NADH oxidase: ≤4 × 10⁻⁴%
GOT: ≤3 × 10⁻³%
GPT: ≤1.5 × 10⁻³%
α-KGDH: ≤3 × 10⁻³%
Additive: Dextran
CHARACTERISTICS:
Molecular weight: 35,000 (SDS-PAGE)
Isoelectric point: 4.8
Km value:
5.6 × 10⁻⁵M (Oxaloacetate)
6.6 × 10⁻⁴M (NADH)
Opt. pH: 7.8
Opt. temperature: 70℃
Stable pH range: 8.0 – 9.0 (70℃, 30 min.)
Stable temp. range: below 80℃ (pH8.5, 30 min.)
APPLICATIONS:
This enzyme is used for the enzymatic determination of L-malate and glutamate oxaloacetate transaminase (GOT) in clinical diagnosis.
Assay Method
Principle
The consumption of NADH is measured at 340 nm by spectrophotometry.
Unit Definition
One unit is defined as the enzyme quantity which oxidizes one μ mole of NADH per minute under the conditions described below.
Reagents
A. 0.1M Tris-HCl Buffer (pH 7.8)
B. 0.01M Phosphate Buffer (KH₂PO₄-NaOH, pH 7.0)
C. Triton X-100 Solution (50 mg/ml)
Weigh 5.0 g of Triton X-100 and dissolve in 30 ml of deionized water with heating. After cooling, fill up to 100 ml with deionized water.
D. 0.01 M Phosphate Buffer, containing 0.1% Triton X-100 (KH₂PO₄-NaOH, pH 7.0)
Dilute 20 ml of Triton X-100 Solution (C) with 0.01 M Phosphate Buffer (B). Fill up to 1,000 ml with 0.01 M Phosphate Buffer (B).
E. NADH Solution
Weigh 9 mg of NADH and dissolve in 0.1M Tris-HCl Buffer (A). Fill up to 50 ml with 0.1M Tris-HCl Buffer (A). (Expires after 5 days at 2–8℃)
F. Substrate Solution
Weigh 11 mg of oxaloacetic acid and dissolve in 0.1 M Tris-HCl Buffer (A). Fill up to 50 ml with 0.1 M Tris-HCl Buffer (A). (Make a fresh solution for each use.)
G. Enzyme Solution
Weigh approx. 20 mg of Malate Dehydrogenase and dissolve in chilled 0.01M Phosphate Buffer (D).
Enzyme Solution should be prepared so that the value of ΔOD/minute becomes in the range of 0.025±0.010.
Procedure
Pipette 2.0 ml of NADH Solution (E) and 0.90 ml of Oxaloacetic Acid Solution (F) respectively into a cuvette (d=10 mm), and keep at 25 ± 0.1℃ for 5 minutes. Then, pipette 0.10 ml of Enzyme Solution (G) into the cuvette and mix well immediately. Keep the reaction mixture at 25 ± 0.1℃.Exactly at 2 minutes and 5 minutes after the addition of Enzyme Solution (G), measure the absorbances of the reaction mixture at 340 nm (A2 and A5).As a blank, pipette 0.01M Phosphate Buffer (D) into another cuvette (d=10 mm) instead of the Enzyme Solution (G) and take the same procedure described above (Ab2 and Ab5).
Calculation
3: Reaction time
6.22: Millimolar extinction coefficient of NADH at 340 nm
3.0: Final volume of the reaction mixture
0.1: Volume of Enzyme Solution
Dm: Dilution multiple of Enzyme Solution

规格

产品名称
苹果酸脱氢酶(MDH)来源于栖热菌
规格或纯度
生物活性,ActiBioPure™,天然,高性能,EnzymoPure™,≥100 U/mg enzyme powder
生化机理
催化苹果酸可逆氧化为草酰乙酸。
生物活性
≥100 U/mg enzyme powder
种属
栖热菌属(Thermus sp.)
序列
Belongs to the LDH/MDH superfamily. MDH type 2 family.
来源
天然
预测分子量
35 kDa
CAS编号和信息
9001-64-3
酶学委员会编号
EC 1.1.1.37
分子类型
酶
储存与运输
物理形态
冻干(Lyophilized)
浓度
≥100 U/mg enzyme powder
储存条件
2-8°C储存
运输条件
低温运输
稳定性与储存
长期储存2-8℃(18个月);复溶后建议分装,避免反复冻融;密封。
单位定义
One unit is defined as the enzyme quantity which oxidizes one u mole of NADH per minute under the condliticwns descrihed below.

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找到9个结果

批号(Lot Number) 证书类型 货号
F2509529 分析证书 M139683
H2131283 分析证书 M139683
K2519474 分析证书 M139683
K2519493 分析证书 M139683
F2509530 分析证书 M139683
F2509531 分析证书 M139683
J2531053 分析证书 M139683
H2131282 分析证书 M139683
I1507107 分析证书 M139683
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