Sulfo-Cy3-Methyltetrazine is a water-soluble dye containing methyltetrazine, a bright and visible fluorophore. It can be used for coupling with trans-cyclooctene. Methyltetrazine is highly reactive towards cyclooctene, and it has optimal stability at physiological pH.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.