NPC-PEG-NPC(PEG-bis-Nitrophenyl Carbonate), MW 20K is a water-soluble PEGylated polymer with two nitrophenyl carbonates (NPCs) to react with amines for bioconjugation.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.