Amine and azide conjugated PEG-carboxylic acid (Amine azide-PEG-COOH, azide amine-PEG-COOH) is a trifunctional PEG derivative, which has amine and azidde group sharing one end and -COOH group on the other end.
Amine group can react with carboxylic acid and its active esters, and isocyanates. It can also react with carbonyl such as ketone and aldehyde.
Azide were used to react azide group “click” chemistry in mild condition, which is very useful for bioconjugation.
COOH can react with amine or OH containing entities.