Cy5 DBCO NHS Ester is a bright far-red fluorescent dual-labeled click chemistry probe with absorption and emission spectra nearly identical to Alexa Fluor® 647 Dye, CF® 647 dyes, or any other cyanine 5 fluorochromes that simultaneously attach DBCO moieties and Far-red fluorescent Cy5 label. Conjugates prepared with Cy5 DBCO NHS esters react with azides to form stable triazoles via a copper-free “click chemistry” reaction that does not require copper catalysts or high temperatures. In applications where the presence of copper is a concern, Cy5 DBCO is an ideal replacement for copper requiring fluorescent alkynes. Cy5 dye is a water-soluble, pH-insensitive, pH 4 to pH 10, far-red fluorescent probe with excitation well suited for 633 nm or 647 nm laser lines.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.