Azido-PEG4-NHS Ester疊氮基-PEG4-NHS 酯是一種標記試劑，可用于通過穩定的酰胺鍵修飾具有疊氮基團的伯胺基團（例如賴氨酸殘基的側鏈或氨基硅烷包被的表面）。疊氮化物 （N3） 基團通過 CuAAC 與末端炔烴反應反應，通過無銅點擊反應與應變環辛炔（例如 DBCO 或 BCN 化合物）反應，或通過稱為 Staudinger 化學的機制與磷化氫標記分子反應，從而實現生物樣品中衍生化分子的高效和特異性偶聯。

Azido-PEG4-NHS Ester is a labeling reagent that can be used to modify primary amine groups (e.g., a side chain of lysine residues or aminosilane-coated surfaces) with an azido group via a stable amide bond. The azide (N3) group reacts with terminal alkynes via CuAAC, strained cyclooctynes (e.g. DBCO or BCN compounds) via Cu-free click reaction or with phosphine-labeled molecules by a mechanism known as Staudinger chemistry, enabling efficient and specific conjugation of derivatized molecules in biological samples.