N-(Biotin-PEG4)-N-bis(PEG4-t-butyl ester) is a branched PEG linker with biotin and hydroxyl moieties. The biotin group is used for the conjugation of proteins and biotin labeling. The alcohol groups can be derivatized to varous active functional groups. The tertiary amine together with the hydrophilic PEG linker substantially increase the water solubility of the compound.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.