磷酸酶(碱性) 来源于牛肠粘膜

产品名称
Analysis Note

Protein determined by biuret.
包装规格取决于 DEA 单位
Preparation Note

亲和纯化
Unit Definition

在 pH 9.8 和 37°C 下，一 DEA 单位本品每分钟可水解 1μmol 4-硝基苯基磷酸酯。（一甘氨酸单位相当于 ~3 DEA 单位）
Physical form

Solution in 3.0 M NaCl containing 5 mM MgCl2, 0.2 mM ZnCl2, and 30 mM triethanolamine, pH 7.6
Application

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 P6774 has been used during preparation of brain lysate.
High specific activity grade recommended for antibody and protein conjugation.
The enzyme from Sigma has been used in the preparation of AP-BGG (alkaline phosphatase-bovine gamma globulin) conjugates. It has been conjugated to sheep anti-rabbit IgG and sheep anti-rabbit IgM in immunological assays. It has also been used to prepare double-enzyme conjugates with HRP for the simultaneous detection of three different intracellular Ig determinants in a single tissue section.
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）。
Biochem/physiol Actions

Alkaline phosphatase, from bovine intestinal mucosa, is most stable in the pH range 7.5-9.5. The enzyme has a broad specificity for phosphate esters of alcohols, amines, pyrophosphate, and phenols and it requires zinc, and magnesium or calcium divalent ions for activity.
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.
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。
Physical properties

Bovine intestinal alkaline phosphatase is a dimeric, membrane-derived glycoprotein. At least three isoforms exist, which typically possess two N-linked and one or more O-linked glycans per monomer.
牛肠碱性磷酸酶为二聚膜衍生糖蛋白。至少存在三种同工酶，每个单体通常拥有两个 N-连接多糖和一个或多个 O-连接多糖。2 该酶需要锌以及镁或钙二价离子才能显示活性。
性质
Related Categories 3.1.x.x Acting on esters, 3.x.x.x Hydrolases, Alkaline Phosphatase, Alkaline Phosphatase Enzymes, Analytical and Industrial Enzymes,
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form buffered aqueous solution
mol wt dimer mol wt ~160 kDa
concentration 5-20 mg/mL
storage temp. 2-8°C