Azide-mPEG-VA-PAB Linkers

Azide-Dap(m-PEG4)-Val-Ala-PAB

Azide-Dap(m-PEG4)-Val-Ala-PAB-PNP

Azide-Lys(m-PEG4)-Val-Ala-PAB

Azide-Lys(m-PEG4)-Val-Ala-PAB-PNP