Hydrazide-PEG-Hydrazide(HZ-PEG-HZ), PEG derivatives whose MW 5K molecular segments are functionalized by hydrazide, hydrazide-polyethylene glycol-hydrazide can react with ketones or aldehydes to form acylhydrazone bonds. pH sensitive for reversible PEGylation. It also inhibits nonspecific binding of charged molecules to the modified surface.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.