2107273-54-9

N-(m-PEG4)-N'-(m-PEG4)-O-(m-PEG4)-O'-(propargyl-PEG4)-Cy5 is a cyanine linker with excitation/emmission maximum 649/667 nm containing an alkyne group, which enables Click Chemistry to attach deeply colored and photostable Cyanine fluorophore to various molecules.