Thermo Scientific Pierce EZ-Link 膦-PEG3-生物素是一种用于标记含叠氮化物分子的生物素化试剂,使得能够通过 Staudinger 连接策略进行基于生物素的分子检测和亲和纯化。当与叠氮化物标记策略结合使用时,该化合物使定向生物素标记有助于使用链霉亲和素探针或链霉亲和素琼脂糖树脂对蛋白相互作用和翻译后修饰进行检测或亲和纯化。通过Staudinger 反应机制,膦-PEG3-生物素的膦基团与叠氮化物基团偶联。通过使用天然存在的代谢构建模块的叠氮化物标记衍生物进行的体内标记,可以将叠氮化物基团引入蛋白或其他细胞靶标中。生物系统中既不存在膦也不存在叠氮化物,因此它们包含用于标记和偶联的化学选择性(相互特异性)连接对。 |
特点 |
•可溶—易溶于水溶性溶剂(例如,DMSO),以便随后在含细胞裂解物和其他生物样品的水性反应混合物中进行稀释•兼容—在简单的缓冲液条件下可有效进行化学反应;不需要铜或还原剂等辅助试剂•化学选择性—膦反应性基团在生物样品方面具有特异性,适用于生物正交叠氮化物标记分子,从而确保生物素化具有特异性•PEG 间隔—聚乙二醇间隔臂有助于保持标记分子的溶解度并降低对与亲和素、链霉素亲和素或中性抗生物素蛋白的亲和结合的空间位阻。 |
数据 |
Chemical structure of Phosphine-PEG3-BiotinThis biotinylation reagent is for labeling and detection of azide-tagged molecules via the Staudinger ligation reaction chemistry. Properties of Phosphine-PEG3-Biotin Example strategy forin vivometabolic labeling with biotin using Phosphine-PEG3-BiotinWhen bioorthogonal azido-sugar derivatives are supplied to living cells, they become incorporated into glycoprotein structures by endogenous post-translational modification mechanisms. The azide-tagged molecules can then be selectively labeled or conjugated to phosphine-activated molecules, in this case, a derivative of biotin. If the azido sugars were supplied to cells being studied for response to a particular treatment, the biotin affinity-tag could be used to purify and analyze differences in glycosylation resulting from the treatment regime. |