store at low temperature | Powder: -20°C for 3 years | In solvent: -80°C for 1 year
ONPG (2-Nitrophenyl β-D-galactopyranoside) 是用作比色和分光光度计底物,可用作 β-半乳糖苷酶活性的检测。
产品描述 | ONPG (2-Nitrophenyl β-D-galactopyranoside) is a colorimetric and spectrophotometric substrate used to detect β-galactosidase activity. |
靶点活性 | β-gal:2.7±0.3 mM(Km), β-gal:464.7±7.8/s(kcat) |
体外活性 | The enzyme displays high hydrolysis ability for ONPG (100%) and moderate activity for its natural substrate lactose (25.7%). However, the hydrolysis ability of the enzyme towards all other chromogenic nitrophenyl analogues is very weak, indicating that Gal308 is a β-galactosidase with narrow substrate specificity. To investigate the kinetic parameters of recombinant enzyme, the Michaelis-Menten constants (Km), turnover numbers (kcat), and catalytic efficiencies (kcat/Km) of Gal308 for ONPG and lactose are determined. The kcat and Km values are 464.7±7.8 s-1 and 2.7±0.3 mM for ONPG, and 264.2±2.1 s-1 and 7.1±0.8 mM for lactose, respectively. The kcat/Km value of the enzyme for ONPG (172.1 s-1mM-1) is 4.6-fold higher than that for lactose (37.2 s-1mM-1), which clearly demonstrated that the catalytic efficiency of Gal308 for ONPG is much higher than that for lactose[1]. |
别名 | 2-硝基苯-beta-D-半乳糖苷, 2-Nitrophenyl β-D-galactopyranoside |
分子量 | 301.25 |
分子式 | C12H15NO8 |
CAS No. | 369-07-3 |
store at low temperature | Powder: -20°C for 3 years | In solvent: -80°C for 1 year
H2O: 7.4 mg/mL (24.56 mM), Sonication is recommended.
可选溶剂 | 浓度 体积 质量 | 1 mg | 5 mg | 10 mg | 25 mg |
H2O | 1 mM | 3.3195 mL | 16.5975 mL | 33.195 mL | 82.9876 mL |
5 mM | 0.6639 mL | 3.3195 mL | 6.639 mL | 16.5975 mL | |
10 mM | 0.332 mL | 1.6598 mL | 3.3195 mL | 8.2988 mL | |
20 mM | 0.166 mL | 0.8299 mL | 1.6598 mL | 4.1494 mL |
对于不同动物的给药剂量换算,您也可以参考 更多...
请在以下方框中输入您的动物实验信息后点击计算,可以得到母液配置方法和体内配方的制备方法: 比如您的给药剂量是10 mg/kg,每只动物体重20 g,给药体积100 μL,一共给药动物10 只,您使用的配方为5% DMSO+30% PEG300+5% Tween 80+60% ddH2O。那么您的工作液浓度为2 mg/mL。
母液配置方法:2 mg 药物溶于 50 μL DMSO (母液浓度为 40 mg/mL), 如您需要配置的浓度超过该产品的溶解度,请先与我们联系。
体内配方的制备方法:取 50 μL DMSO 主液,加入 300 μL PEG300, 混匀澄清,再加 50 μL Tween 80,混匀澄清,再加 600 μL ddH2O, 混匀澄清。
您可能有的问题的答案可以在抑制剂处理说明中找到,包括如何准备库存溶液,如何存储产品,以及基于细胞的分析和动物实验需要特别注意的问题。
ONPG 369-07-3 Others inhibit 2-Nitrophenyl b-D-galactopyranoside Inhibitor 2-硝基苯-beta-D-半乳糖苷 2-Nitrophenyl β-D-galactopyranoside 2-Nitrophenyl beta-D-galactopyranoside inhibitor