Fmoc-Val-Ala-PAB-PNP can be used to design cleavable ADC linkers. The Val-Ala, as shown in the ACD Zynlonta, is effectively cleaved by lysosomal proteolytic enzymes while being highly stable in human plasma. The Fmoc group can be deprotected under basic condition to obtain the free amine which can be used for further conjugations. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.