Axispharm offers you high-purity CAS:2107273-08-3 N,N’-Bis-(propargyl-PEG4)-Cy5, a cyanine derivative with an excitation/emission maximum of 649/667 nm, which contains an alkynyl group, which makes Click Chemistry Capable of attaching dark and photostable cyanine fluorophores to a variety of molecules.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
