4arm PEG Succinimidyl Carboxymethyl Ester (4-Arm PEG-SCM), MW 20K is a multi-arm PEG derivative with succinimidyl ester at the end of the four arms. Succinimidyl carboxymethyl ester can be dissociated with the active drug Amino bond connection, the amino acid bond produced by coupling is more stable than the ester bond.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
