Bis-Biotin-PEG23 contains two biotin moieties with a PEG spacer in between. The biotin molecule is commonly used for conjugation and labeling. The hydrophilic PEG linker improves the aqueous solubility of the resulting biotinylation complex.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.