DBCO-PEG4-VC-PAB-MMAE, an ADC linker comprising DBCO-PEG4-VC-PAB coupled with the tubulin polymerization inhibitor MMAE, serves as a key component in the formulation of antibody-drug conjugates (ADCs). MMAE, a synthetic derivative of dolastatin 10, inhibits tubulin polymerization, acting as a potent mitotic inhibitor.