TCO-PEG4-TFP Ester是一种可与氨基发生反应的标记试剂,用于修饰蛋白质、抗体以及其他含氨基的生物聚合物。2,3,5,6‑四氟苯酚(TFP)构成的活性酯在水相中具有优异的抗水解稳定性,对生物聚合物的标记效率更高,标记重现性更佳。羧酸 TFP 酯与伯胺的反应速率和 NHS 酯相当,反应后形成共价酰胺键,该酰胺键与伯胺同 NHS 酯或磺基‑NHS 酯反应生成的酰胺键结构完全相同。TCO 的半衰期较短,会自发异构化为 CCO(顺式环辛烯)并丧失反应活性。
TCO-PEG4-TFP Ester is an amine-reactive labeling reagent used to modify proteins, antibodies, and other amine-containing biopolymers. A 2,3,5,6-tetrafluorophenol (TFP) is a reactive ester that displays much better stability toward hydrolysis in aqueous media resulting in more efficiency and better reproducible labeling of biopolymers. TFP ester of carboxylic acids react with primary amines at the same rate as NHS ester forming covalent amide bond that is identical to one formed by the reaction between primary amines and NHS esters or sulfo-NHS esters. The half-life of TCO is short as it will naturally isomerize into CCO (cis-cycloctene) and lose the reactivity.