DBCO-(PEG2-VC-PAB-MMAE)2 consists of Monomethyl auristatin E (MMAE), a toxin payload in antibody-drug conjugate [1], conjugated to the cleavable linker DBCO-(PEG2-VC-PAB)2. MMAE, a potent tubulin inhibitor, serves as the cytotoxic component in this formulation.