PEG (polyethylene glycol) is a water-soluble, nontoxic, biocompatible polymer that has been approved by the Food and Drug Administration (FDA) for human intravenous, oral and dermal applications. Attachment of PEG chains to proteins can reduce their immunogenicity, minimize proteolytic cleavage and increase their serum half-life. PEG has also been attached to small molecules and liposomes for more selective delivery. PEG-modification of superparamagnetic iron oxide and quantum dots can improve their biocompatibility and reduce non-specific uptake.

To allow sensitive measurement of PEGylated compounds, we developed the first monoclonal antibody (AGP3) with specificity for PEG. Since then, we have produced a range of specific anti-PEG IgG and IgM monoclonal antibodies for use in ELISA, FACs, IHC and flow cytometry.

IgG antibodies

Excellent for detection of PEG-compounds

IgM antibodies

Good for capture of PEGylated compounds

Human antibody standards

IgG, IgE and IgM stds for ADA assays

Biotin-labeled antibodies

Detection and capture of PEGylated compounds

Combo packs

Great for identifying the best antibody for your application

Product list

Summary of all anti-PEG antibodies

Our defining characteristics

We strive to provide the highest quality anti-PEG antibodies and humanized anti-PEG antibody standards



20 years experience with anti-PEG antibodies


Prompt Service

Rapid response to questions and orders


Trouble shooting

Our experience can help you succeed



We continue to develop and publish in this field



Consistently the highest quality antibodies



Choice of anti-PEG antibodies and standards

Where are we?

We are located at Academia Sinica in Taipei, Taiwan

  • tobacco shed
  • Sun Moon lake
  • Kenting
  • Yeh Liu
  • Shan Lin

Have a question or need a custom quote?

You can send an email to

You can also get technical help from Dr. Steve Roffler at the Institute of Biomedical Sciences, Academia Sinica