计算溶液所需的质量、体积或浓度。
ActiBioPure™,EnzymoPure™,生物活性,重组,高性能 级 提供 ≥85%(SDS-PAGE) 纯度,适用于对基线干扰要求严格的色谱和分析工作流程。
-20°C储存,避免反复冻融。超低温运输 。请查阅批次 COA 获取详细规格。
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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。
β-1,4-半乳糖基转移酶 (LgtB),EC 2.4.1.90,来源于Neisseria meningitides ,该酶用于将Galactose以β1,4连接方式连接到以 GlcNAc或者Glucose为非还原端的寡糖链上。目前酶法合成LacNAc的最有效的酶。本产品利用大肠杆菌重组表达,纯度高,活性高。
反应式
GlcNAc + UDP-Gal ——LacNAc + UDP
使用方法
1.取出酶冰上解冻,混匀后备用,解冻后酶请勿反复冻融,可以放置2-8℃短期保存(3天以内)。
2.按照反应体系加入底物以及供体糖核苷酸(UDP-Gal),5mM MnCl₂,可适当加入缓冲盐(如:Tris-HCl),调节pH为6.0,加入适量LgtB(根据反应需求); 也可以用一锅多酶法合成UDP-Gal,加入酶GalK和AtUSP,底物ATP,UTP 以及底物受体。调节pH为6.0,加入适量lgtB(根据反应需求)。
3.混匀后,将样品置于 37℃孵育1-4h。
【注】体系放大时候,孵育时间或酶量需要根据实际情况调整,可低速震荡混匀。
注意事项
为了您的安全和健康,请穿实验服并戴一次性手套操作。本产品仅作科研用途!
β-1,4-Galactosyltransferase (LgtB), EC 2.4.1.90, derived from Neisseria meningitidis.This enzyme transfers galactose via a β‑1,4 linkage to oligosaccharide chains with non‑reducing‑terminal GlcNAc or glucose. It is currently the most efficient enzyme for enzymatic synthesis of LacNAc. Recombinantly expressed in Escherichia coli, this product exhibits high purity and high activity.
Reaction Equation
GlcNAc + UDP‑Gal → LacNAc + UDP
Usage Instructions
Take out the enzyme and dissolve it in an appropriate amount of purified water, mix well and set aside. Do not repeatedly freeze‑thaw the dissolved enzyme; store it at 2–8 °C.
Add substrates and sugar nucleotide donor (UDP‑Gal), 5 mM MnCl₂ to the reaction system. Appropriate buffer salts (e.g., Tris‑HCl) may be supplemented to adjust pH to 6.0, then add an appropriate amount of LgtB according to reaction requirements. Alternatively, UDP‑Gal can be synthesized via a one‑pot multi‑enzyme method by adding enzymes GalK and AtUSP, substrates ATP, UTP, and acceptor substrates. Adjust pH to 6.0 and add an appropriate amount of LgtB according to reaction requirements.
After mixing, incubate the sample at 37 °C for 1–4 hours.
Note: When scaling up the reaction system, adjust incubation time or enzyme dosage according to actual conditions; low‑speed shaking can be used for homogenization.
Precautions
For your safety and health, wear a lab coat and disposable gloves during operation. This product is for research purposes only.
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | G1439963 | |
| 分析证书 | G1439963 |
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