Ald-PEG3-azide contains an aldehyde and an azide end group. Aldehyde is reactive toward hydrazide and aminooxy groups which are commonly used in biomolecular probes for labeling and crosslinking carbonyls. The azide group can react with alkynes, DBCO and BCN through Click Chemistry reactions. The hydrophilic PEG linker can increase the solubility of the compound in aqueous media.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.