Methoxypolyethylene glycol carboxyl (mPEG-COOH) from Advanced BioChemicals (ABC) are high quality PEG reagents that attach a reactive carboxyl (COOH) group at the terminal site, which can selectively reacts with amino group in the peptide coupling reagent such at NHS, DDC and EDC at pH 7-8.
Advanced BioChemicals (ABC) offer mPEG-COOH with MW 2kDa, MW 3.5 kDa, MW 5kDa, MW 10kDa, MW 20kDa and MW 40kDa, in 1g, 5g and 10g packing sizes. Different MW of mPEG-COOH products may be available by custom synthesis, please contact us at sales@advancedbiochemicals.com for a free quote.