APDye Fluor 647-PEG4-TCO is a water-soluble, pH-insensitive from pH 4 to pH 10 bright, far-red fluorescent probe with excitation ideally suited for the 633 nm or 647 nm laser lines. A significant advantage to using long wavelength dyes such as Cy5 or APDye Fluor 647-PEG4-TCO over other fluorophores is the low autofluorescence of biological specimens in this region of the spectrum. APDye Fluor 647-PEG4-TCO is a bright, far-red fluorescent, probe routinely used for imaging of azide-containing biomolecules without the need for copper catalyst. TCO reagent is highly reactive with tetrazine in an inverse electron demand Diels Alder (IEDDA) reaction followed by a retro-DA reaction.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
