Propargyl-PEG13-acid consists of an alkyne group and a carboxylic acid. The carboxylic acid reacts with amine groups to form amide bonds in the presence of EDC or HATU as an activator. The alkyne group is commonly used in copper catalyzed azide-alkyne Click Chemistry reactions. The hydrophilic PEG units enhance the solubility of the molecule in aqueous media.
