m-PEG4-Br is a cleavable ADC linker used in the synthesis of antibody-drug conjugate (ADC) for Trastuzumab (HY-P9907). m-PEG4-Br is placed distally from the monomethyl auristatin E (MMAE) payload to yield an ADC with altered hydrophilicity, antigen binding, and in vitro potency[1]. m-PEG4-Br also can be used as a PROTAC linker that can be used in the synthesis of PROTACs.
ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker.