4-arm Poly(ethylene glycol) amine (4-Arm PEG-NH2) from Advanced BioChemicals (ABC) are high quality multi-arm PEG derivatives with four tprimary amine groups at each terminal of the four arms that can quickly react with activated carboxyl group such as NHS ester to form stable amide bond. The total molecular weight of 4-Arm PEGs is the sum of the molecular weights of all four arms.
Advanced BioChemicals (ABC) offer 4-Arm PEG-NH2 with MW 2kDa, MW 5kDa, MW 10kDa, MW 20kDa and MW 40kDa, in 1g, 5g and 10g packing sizes. Different MW of 4-Arm PEG-NH2 products may be available by custom synthesis, please email us at firstname.lastname@example.org for details. Advanced BioChemicals (ABC) also provide repackaging services, please contact us at email@example.com for a free quote.