Biotin-PEG-Thiol, MW 5K is a thiolated biotin polyethylene glycol derivative containing free thiol groups and biotin molecules that can react with maleimide by forming a thioether bond. Widely used for molecular target detection.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.