N-DBCO-N-bis(PEG2-amide-PEG4-Val-cit-PAB-MMAE) is a precursor of antibody drug conjugate. It contains a DBCO group and two protease-sensitive Val-Cit dipeptide with MMAE payloads. DBCO group is a highly reactive cycloalkyne which is commonly used for copper-free Click Chemistry reactions. The MMAE is a synthetic antineoplastic agent. It can be attached to a monoclonal antibody (MAB) which directs it toward cancer cells. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.