G418是一種氨基糖苷類抗生素 ,在分子遺傳試驗中，是穩(wěn)定轉染最常用的抗性篩選試劑。它通過抑制轉座子Tn601，Tn5 的基因,干擾核糖體功能而阻斷蛋白質合成，對原核和真核等細胞產生毒素 ,包括細菌、酵母、植物和哺乳動物細胞 ,也包括原生動物和蠕蟲。當neo基因被整合進真核細胞DNA后 ,則能啟動neo基因編碼的序列轉錄為mRNA ,從而獲得抗性產物氨基糖苷磷酸轉移酶的高效表達 ,使細胞獲得抗性而能在含有G418的選擇性培養(yǎng)基中生長。G418的這一選擇特性 ,已在基因轉移、基因敲除、抗性篩選以及轉基因動物等方面得以廣泛應用。
technical data:
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ITEM |
SPECIFICATION |
RESULT |
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Appearance |
White powder |
conforms |
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Solubility (Turbidity) 100mg/mL in H2O |
Clear to Very Slightly Hazy |
conforms |
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Biological Assay |
ED50 Resistant: ≥2500 ug/mL ED50 Sensitive: ≤400 ug/mL |
conforms |
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Absorbance: |
1mg/mL H2O:280nm < 0.015 100mg/Ml H2O: 570nm <0.10 |
conforms |
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pH |
4.6-6.0 |
5.6 |
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Heavy metals |
≤100 ppm |
90 ppm |
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Purity by HPLC
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≥90% |
94.97% |
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** (by Karl Fischer) |
< 10 % |
3.0 % |
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Potency (on a dry basis) |
Not less than 720 ug/mg |
740 ug/mg |
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CONCLUSION: THE RESULTS CONFORM WITH ENTERPRISE STANDARD
