High quality heterofunctional monodisperse Amine PEG Carboxyl aminoacids (NH2-PEG-CM, or Amine PEG Acetic Acid; NH2-PEG-PA, or Amine PEG Propionic Acid) from JenKem Technology are generally employed as crosslinking agents or as spacers between two different chemical entities. The PEG moiety in the single molecule discrete heterofunctional PEG derivatives provides water solubility, biocompatibility, and flexibility. Applications are especially geared towards the development of antibody drug conjugates (ADC’s).

Monodisperse heterobifunctional PEGylation reagents with molecular weights and functional groups not listed in our online catalog may be available by custom synthesis. Please inquire at about pricing and availability of custom PEGs.

Bulk PEGs and GMP grade PEGs are made-to-order. Please contact us for bulk pricing.

Visit to learn more about our heterobifunctional monodisperse discrete PEG aminoacids for ADCs.


1. Raza, A., et al., Influence of PEGylated porous silicon nanoparticles on permeation and efflux of an orally administered antibiotic. Materials Today Advances, 2022, 13, p.100210.

Founded in 2001 by experts in PEG synthesis and PEGylation, JenKem Technology specializes exclusively in the development and manufacturing of high quality polyethylene glycol (PEG) products and derivatives, and related custom polymer synthesis and PEGylation services. JenKem Technology is ISO 9001 and ISO 13485 certified, and adheres to ICH Q7A guidelines for GMP manufacture. The production of JenKem® PEGs is back-integrated to in-house polymerization from ethylene oxide, enabling facile traceability for regulated customers. JenKem Technology caters to the PEGylation needs of the pharmaceutical, biotechnology, medical device and diagnostics, and emerging chemical specialty markets, from laboratory scale through large commercial scale.


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