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- 详细信息
- 文献和实验
- 技术资料
- 保存条件：
Powder: -20°C, 3 years; 4°C, 2 years. In solvent: -80°C, 6 months; -20°C, 1 month.
- 库存：
货期：1-2天
- 供应商：
MedChemExpress LLC
- CAS号：
389-08-2
- 规格：
10 mM * 1 mL/500 mg/5 g/10 g
| 规格： | 10 mM * 1 mL | 产品价格： | ￥550.0 |
|---|---|---|---|
| 规格： | 500 mg | 产品价格： | ￥500.0 |
| 规格： | 5 g | 产品价格： | ￥600.0 |
| 规格： | 10 g | 产品价格： | ￥900.0 |
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Nalidixic acid
CAS No. : 389-08-2
MCE 国际站：Nalidixic acid
产品活性：Nalidixic acid，一种喹诺酮类抗生素 (antibiotic)，对革兰氏阳性和革兰氏阴性细菌均有效。Nalidixic acid 在较低浓度下以抑菌的方式起作用，而在较高浓度下具有杀菌作用。Nalidixic acid 抑制 DNA 促旋酶和拓扑异构酶 IV 的亚基，并可逆地阻止易感细菌中的 DNA 复制。
研究领域：Anti-infection | Cell Cycle/DNA Damage
作用靶点：Bacterial | Antibiotic | Topoisomerase
In Vitro: Nalidixic acid is against a variety of microorganisms, it is against with Escherichia coli, Pasteurella spp., Klebsiella pneuiiioniae, Aerobacter aeroyenes, Proteus spp., Salmonella spp., Shigella spp. and Brucella spp. with MIC values of 5.0-12.5 μg/ml, 0.5-2.5 μg/ml, 0.8-25.0 μg/ml, 1.0-25.0 μg/ml, 1.25-30.0 μg/ml, 8-3.2 μg/ml, and 7.5-10.0 μg/ml, respectively.
In Vivo: The in vivo activity of Nalidixic acid is most pronounced against Gram-negative bacteria, while Gram-positive organisms are generally more resistant. Maximal activity is observed against systemic infections caused by E. coli, A. aerobacter, Proteus mirabilis, Shigella fkxneri, the ED50 values are 25 mg/kg, 60 mg/kg, 50 mg/kg, and 62 mg/kg, respectively.
The acute toxicity (LD50) of Nalidixic acid in mice following oral and parenteral administration is: oral, 3300 mg/kg; intravenous, 176 mg/kg, and subcutaneous, 500 mg/kg.
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文献和实验抗细菌性合成化合物之一，具有宽广的抗菌谱，特别对革兰氏阴性菌有很强的效力。对动物及人毒性低。已知对细菌具有抑制 DNA合成的特异性。
β-咪唑丙烯酸。给予狗大量的组氨酸后可从尿中得到，还有细菌作用于组氨酸也能生成尿刊酸。在哺乳类的肝脏或细菌中作为从组氨酸到谷氨酸的代谢途径的中间体，在组氨酸酶的作用下进行分子内的无氧脱氨基而生成。通常尿刊酸在肝脏酶（尿刊酸酶）的作用下进一步分解转变成谷氨酸。
C24 H40 O5 3α， 7α， 12α三羟基 -5 β胆烷酸，是广泛分布于以人为首的脊椎动物中的最主要的胆汁酸。在胆汁中，以与甘氨酸或牛磺酸结合成甘胆酸（ glycocholic acid）或牛磺胆酸的形态存在。
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