Propargyl-PEG4-acid is a PEG-based PROTAC linker can be used in the synthesis of BTK-IAP PROTACs Ibrutinib -based PROTAC 2 and an analogue PROTAC 3. PROTAC 3 causes BTK degradation with a DC50 of 200 nM in THP-1 cells[1].
Propargyl-PEG5-acid is a non-cleavable 5-unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs) and can be employed to create ADC inhibitors of Galectin-3 [1].