N,N-Bis(PEG1-azide)-N-amido-PEG2-amine is a branched biotin probe with an azide group and a methyl ester terminal group. The azide group undergoes click chemistry to conjugate alkyne bearing biomolecules. The amino group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.