m-PEG-Butyraldehyde, MW 5K is a linear, monofunctionally modified PEG. Its methoxypolyaldehyde reacts with amines and the N-terminus of peptides and proteins to form imines containing C=N double bonds. Butyraldehyde reacts with hydrazides to form stable hydrazone bonds or reacts with alkoxyamines to form stable oxime bonds.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.