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N-(azide-PEG3)-N'-(m-PEG4)-Benzothiazole Cy5 is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1]. N-(azide-PEG3)-N'-(m-PEG4)-Benzothiazole Cy5 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

N-(azide-PEG3)-N'-(m-PEG4)-Benzothiazole Cy5 is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1]. PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins[1].

PEGs

[1]. An S, et al. Small-molecule PROTACs: An emerging and promising approach for the development of targeted therapy drugs. EBioMedicine. 2018 Oct;36:553-562