Azido-PEG4-Val-Cit-PAB-OH is a 4-unit PEG ADC linker and a PEG-based PROTAC linker. It is employed for the synthesis of antibody-drug conjugates (ADCs)[1] and PROTACs[2].
Azido-PEG4-Val-Cit-PAB-MMAE is a drug-linker conjugate for antibody-drug conjugates (ADCs), comprising the anti-mitotic agent monomethyl auristatin E (MMAE, a tubulin inhibitor), connected through the cleavable linker Azido-PEG4-Val-Cit-PAB-OH.