N-(m-PEG4)-N’-(PEG4-acid)-Cy5 CAS:2107273-32-3 is a Cy5 dye, a far-red to near-infrared fluorophore used in biological research. It is modified with two 4-unit polyethylene glycol (PEG) chains: one ends with a methoxy group and the other with a carboxylic acid. The PEG chains enhance solubility, while the carboxylic acid can link the dye to a protein or antibody, facilitating use as a fluorescent label in research or potentially as a therapeutic agent.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.