DBCO-S-S-PEG3-biotin 是一种 PROTAC linker，属于 PEG 类。可用于合成 PROTAC 分子。DBCO-S-S-PEG3-biotin 是一种点击化学试剂。它含有 DBCO 基团，可以和含有 Azide 基团的分子发生环张力 (strain) 促进的炔-叠氮环加成反应 (SPAAC)。 DBCO-S-S-PEG3-biotin is a cleavable reagent for introduction of a biotin moiety to azide-containing biomolecules using copper-free Click Chemistry. The hydrophilic spacer arm provides better solubility to the labeled molecules in aqueous media. The disulfide bond in this linker can be cleaved using reducing agents such as DTT, BME and TCEP to remove the biotin label.