DBCO- (PEG) 3-VC-PAB-MMAE is a agent-linker conjugate for ADC. DBCO- (PEG) 3-VC-PAB-MMAE is made by Monomethyl auristatin E conjugats to DBCO- (PEG) 3-vc-PAB linker. DBCO- (PEG) 3-VC-PAB-MMAE can be used for the research of cancer[1]. DBCO- (PEG) 3-VC-PAB-MMAE is a click chemistry reagent, it contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.