碱性磷酸酶 来源于牛肠粘膜

P755478-2KU

2KU

≥2,000 DEA units/mg protein

Sigma 酶已用于测定磷脂酰肌醇-4-磷酸盐和磷脂酰肌醇-4,5-二磷酸。它也被用于使用 氟磺酸™修饰电极的碱性磷酸酶检测。推荐用于抗体和蛋白质缀合的高比活性等级。碱性磷酸酶可用于酪蛋白和其他蛋白质的去磷酸化。碱性磷酸酶还可用于 DNA 或 RNA 的 5′-末端的去磷酸化，以防止自我连接。经碱性磷酸酶的去磷酸化作用后，DNA 或 RNA 还可被放射性标记磷酸盐标记（通过 T4 多核苷酸激酶）。 碱性磷酸酶用于偶联抗体和其他蛋白，用于 ELISA、免疫印迹和组织化学检测。常规用于去磷酸化蛋白质，如酪蛋白和核酸。需要高灵敏度时可用于蛋白标记。也可用碱性磷酸酶对 5′-防止自身连接的 DNA 或 RNA 的末端。用碱性磷酸酶去磷酸化后，也可用放射性标记的磷酸盐（通过 T4 多核苷酸激酶）标记 DNA 或 RNA。产物 P5521 已用于研究 GTP 水解 。应用： 这种酶是一种糖蛋白，含约 12% 的碳水化合物（6% 己糖和 6% 其他中性糖）。每个碱性磷酸酶分子含有四个锌原子和四个二硫键。在镁存在的情况下，碱性磷酸酶活性达到最大。对磷酸对硝基苯基磷酸酯、磷酸苯酯、磷酸酚酞、α-甘油磷酸酯、β-甘油磷酸酯、2-磷酸甘油酯、磷酸丙糖酯、葡萄糖-6-磷酸、葡萄糖 1-磷酸、果糖 1-磷酸、果糖 6-磷酸、腺苷 5-磷酸腺苷 3-磷酸、磷酸烯醇丙酮酸和 β-烟酰胺腺嘌呤二核苷酸磷酸等磷酸单酯的水解进行催化。 砷酸盐、半胱氨酸、碘、无机磷酸盐、焦磷酸盐、磷酸二异丙酯、三苯基磷酸盐、氟磷酸二异丙酯和 L-苯丙氨酸是碱性磷酸酶的一些强抑制剂。 The enzyme is a glycoprotein containing approximately 12% carbohydrate (6% hexoses and 6% other neutral sugars). Each molecule of alkaline phosphatase contains four zinc atoms and four disulfide bridges. Maximal activity with alkaline phosphatase is achieved in the presence of magnesium. It catalyzes the hydrolysis of phosphate monoesters such as p-nitrophenyl phosphate, phenyl phosphate, phenolphthalein phosphate, α-glycerol phosphate, β-glycerol phosphate, 2-phosphorylglycerate, triosephosphate, glucose-6-phosphate, glucose 1-phosphate, fructose 1-phosphate, fructose 6-phosphate, adenosine 5-phosphate adenosine 3-phosphate, phosphoenolpyruvate, and β-nicotinamide adenine dinucleotide phosphate. Arsenate, cysteine, iodine, inorganic phosphate, pyrophosphate, diisopropyl phosphate, triphenylphosphate, diisopropyl fluorophosphate, and L-phenylalanine are some of the strong inhibitors of alkaline phosphatase. Application: Alkaline phosphatase can be used to dephosphorylate casein and other proteins. Alkaline phosphatase may be also be used to dephosphorylate the 5′-termini of DNA or RNA to prevent self-ligation. DNA or RNA can also be tagged with radiolabeled phosphate (via T4 polynucleotide kinase) after dephosphorylation with alkaline phosphatase.. Alkaline phosphatase is used for conjugation to antibodies and other proteins for ELISA, Western blotting, and histochemical detection. It is routinely used to dephosphorylate proteins, such as casein, and nucleic acids. It may be used for protein labeling when high sensitivity is required. Alkaline phosphatase may be also be used to dephosphorylate the 5′-termini of DNA or RNA to prevent self-ligation. DNA or RNA can also be tagged with radiolabeled phosphate (via T4 polynucleotide kinase) after dephosphorylation with alkaline phosphatase. Product P5521 has been used to study GTP hydrolysis . High specific activity grade recommended for antibody and protein conjugation. The enzyme from Sigma has been used in the assay of phosphatidylinositol 4-phosphate and phosphatidylinositol 4,5-bisphosphate. It has also been used for alkaline phosphatase assays using a Nafion-modified electrode.

来自牛肠粘膜的碱性磷酸酶在 pH 7.5-9.5 范围内最稳定。这种酶对醇、胺、焦磷酸和酚的磷酸酯有广泛的特异性，它需要锌、镁或钙的二价离子来具有活性。该酶对醇类、胺类、焦磷酸盐以及酚类的磷酸酯具有广泛的特异性。常用于蛋白质和核酸的去磷酸化。