Biotin-PEG4-bis-PEG3-TCO serves as a branched PEG linker comprised of biotin that binds strongly to avidin or streptavidin for protein labeling or purification and two terminal TCO moieties for fast, efficient click chemistry with tetrazines. The PEG linkers enhance the water solubility of the compound. Branched linkers allow for more payload attachment to ADC. Reagent grade, for research purpose.
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