Azide-Polysarcosine50(N3-polysarcosine) is a lipid-polypeptide conjugate based on the endogenous amino acid sarcosine (N-methylated glycine) with an average of 50 sarcosine units. pSar combines PEG-like excellent water solubility, protein resistance, low cytotoxicity, and non-immunogenicity characteristics while being based on endogenous material.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.