Biotin-PEG-COOH (MW 3400)

Biotin-PEG-COOH (MW 3400) is a linear heterobifunctional PEG compound featuring biotin and a carboxylic acid functional group. The biotin moiety can bind with high specificity and affinity to avidin and streptavidin. In the presence of a coupling agent, Biotin-PEG-COOH (MW 3400) can be used for biotinylation of antibodies, proteins, and other macromolecules containing primary amines.