NH-Bis-m-PEG4 linker contains a secondary amine group in between the two end azide groups. The amino group reacts with carboxylic acids, activated esters, carbonyls to furnish a biological probe such as fluorescence/photo probe and target probe etc. The resulting probe can undergo a sequential click chemistry to conjugate with two biomolecules. PEG spacer increases the solubility of the resulting substance in aqueous media.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.