Biotin-PEG-COOH (MW 40000)

Biotin-PEG-COOH (MW 40000) is a linear heterobifunctional PEG compound possessing biotin and carboxylic acid functional groups. The biotin moiety exhibits high specificity and affinity for binding with avidin and streptavidin. In the presence of a coupling agent, Biotin-PEG-COOH (MW 40000) can biotinylate antibodies, proteins, and other macromolecules containing primary amines.