TCO-PEG4-NHS ester is a PEG analogue containing a TCO moiety and a NHS ester. The hydrophilic PEG spacer increases water solubility and decreases steric hindrance during ligation. This reagent can be used to label antibodies, proteins, and other primary amine-containing macromolecules with TCO moiety. References: Sano K, Nakajima T, Miyazaki K, Ohuchi Y, Ikegami T, Choyke PL, Kobayashi H. Short PEG-linkers improve the performance of targeted, activatable monoclonal antibody-indocyanine green optical imaging probes. Bioconjug Chem. 2013 May 15;24(5):811-6. doi: 10.1021/bc400050k. Epub 2013 May 3. PubMed PMID: 23600922; PubMed Central PMCID: PMC3674550.

纯度：≥98%

CAS：1613439-69-2