Amine-PEG-valeric Acid, MW 2K is a bifunctional modified PEG containing free amine and terminal carboxylic acid. Valeric acid is a linear alkyl carboxylic acid that can be converted to N-hydroxysuccinimide active esters that are widely used in bioconjugation.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.