Thiol PEG Acetic Acid (SH-PEG-CH2COOH), MW 3.5K is a heterobifunctional thiol PEG acetic acid that can be activated with EDC or HATU for conjugation with amines. Thiols react with maleimides and disulfide bonds to form stable thioether bonds and new disulfide bonds, respectively.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.