m-PEG4-CH2-aldehyde linker contains an aldehyde group. Aldehyde reacts specifically with hydrazide and aminooxy groups, which are commonly used for labeling and crosslinking carbonyl groups. The mPEG modification increases the aqueous solubility of the resulting compound.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.