Azide-PEG4-maleimide 試劑盒包含兩個組件,分別是 NHS-3-maleimidopropionate (MPS) 和 Azide-PEG4-amine 試劑,用來製備最終的混合物。目標產品擁有兩個功能基團:maleimide 和 azide,並以四乙烯基醚連接劑作為兩步交聯技術的基礎。
Azide-PEG4-maleimide 是一種交聯劑產品,專為巰基-maleimide 化學反應設計,azide 末端基團可用於通過 CuAAC 標記多種蛋白質、胜肽及親和試劑。
Azide-PEG4-maleimide 不穩定,因此需要在使用前即時製備。應使用乾燥有機溶劑製備儲備液,並可在 -20°C 保存數小時。
試劑盒組件:
#1:3-Maleimidopropionic acid NHS-ester(白色結晶)
#2:Azide-PEG4-amine(無色至淡黃色液體)
Protocol
- Add 1 mL of dry organic solvent such as dimethyl sulfoxide (DMSO) or dimethyl formamide (DMF) to 1.1 eq oil-like Azide-PEG4-amine (Component #2) and shake for 30 seconds. The solvent volume is taken in accordance with the initial quantities of the components.
- Add 1.0 eq of solid 3-Maleimidopropionic acid NHS-ester (Component #1) to a solution of 1.1 eq Azide-PEG4-amine (Component #2) with stirring or shaking, and then stir or shake for 30 minutes at room temperature. TLC can be used to confirm that the reaction was completed.
Important! For large-scale load (1 g) gradual addition of 3-Maleimidopropionic acid NHS-ester (in portions of 50 mg over 5 minutes) to an Azide-PEG4-amine solution with stirring in an inert atmosphere is recommended.
Azide-PEG4-maleimide kit
Storage conditions: Transportation: at room temperature. Store at -20°С.

