Catalog # Pkg Size Price(USD) Quantity
A137-1 4 x 2 mg $149.00
A137-10 10 mg $95.00
A137-25 25 mg $195.00
A137-100 100 mg $495.00

TCO-PEG4-NHS Ester is a pegylated lebeling reagent with enhanced water-solubility used for TCO labeling of antibodies, proteins and other primary amine-containing macromolecules. A long (29A), hydrophilic PEG spacer arm provides a long and flexible connection that minimizes steric hindrance involved with ligation to complementary tetrazine-containing molecules.