Biotin-PEG-CH2CO2H ,MW3.5K is a linear heterobifunctional PEG reagent with a biotin and a carboxylic acid. It is a useful crosslinking or bioconjugation reagent with a PEG spacer. Biotin can bind to avidin and streptavidin with high specificity and affinity and achieve non-covalent PEGylation.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.