t-Boc-N-amido-PEG-amine, MW 2,000 has a t-Boc protecing group and free amine which can be used in direct coupling with succinimidyl or PFP ester via amide bond formation. The t-Boc can be easily removed under acidic condition to produce a free primary amine. Reagent grade, for research purpose.
Usually ships within 24 hours.