TCO-PEG1-Val-Cit-PAB-OH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADC). The Val-Cit is specifically cleaved by cathepsin B. As this enzyme is only present in the lysosome the ADC payload will be release only in the cell.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.