Mal-PEG4-Val-Ala-PAB is a cleavable ADC linker. The Val-Ala linkers can be cleaved by Cathepsin B. Maleimide (Mal) group is reactive toward thiol groups. PEG space improve compound’s aqueous solubility. PNP is a good leaving group.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.