JenKem Technology provides high quality polyethylene glycol (PEG) derivatives for C-terminal PEGylation with high purity and low polydispersity, from non-GMP laboratory scale, to large commercial scale in GMP and non-GMP grade.JenKem Beijing R&D Amine functionalized PEGs are the most utilized PEG reagents for C-terminus PEGylation proteins and peptides. PEGylation of carboxyl groups with PEG amines requires the presence of coupling agents, such as water-soluble EDC, with or without NHS, for aqueous PEGylation at pH 7.2 [1-4]; or water-insoluble DCC, for non-aqueous carboxyl PEGylation reactions [5].

JenKem Technology manufactures linear and branched multi-arm amine functionalized PEGs, either homofunctional and heterobifunctional. The sterically bulky structure of JenKem Technology’s proprietary Y-shape branched PEG derivatives, consisting of two linear methoxy PEG chains attached to a central core with an active amine group, may help to reduce the number of attachment sites to a protein molecule.

Activated PEG products for C-terminal PEGylation with molecular weights, branching, and functional groups not listed in our online catalog may be available by custom synthesis. Please inquire at tech@jenkemusa.com about pricing and availability of custom PEGs for Carboxyl PEGylation, and PEGylation services.

JenKem Technology provides GMP grade PEG derivatives and bulk orders via custom synthesis, offering the opportunity to match customers’ special quality requirements. JenKem Technology is capable of development and synthesis of a wide range of GMP PEG derivatives in 200g to 40 kg or greater batches, under ISO 9001 and ISO 13485 certified quality management system, following ICH Q7A guidelines. In 2020 JenKem Technology will transition to use High Purity (> 99%) mPEG Raw Materials to manufacture all GMP grade Methoxy PEG Derivatives. For inquiries on cGMP production of PEG derivatives please contact us at tech@jenkemusa.com.

For global distribution, please visit link. Click the buttons below to order directly from JenKem Technology:

Y-shape PEG Amine
PEG PRODUCT SUBSTITUTION REACTIVITY DETAILS
≥ 95% Y-shape PEG Amine, more reactive towards acylating agents than the hydroxyl group; readily undergoes reductive amination reactions. JenKem proprietary Y-shape PEGs are more selective, due to their sterically bulky structure. [6]
Methoxy PEG Amine
PEG PRODUCT SUBSTITUTION REACTIVITY DETAILS
≥ 95% Methoxy PEG Amine. Attaches via stable linkages, such as amide, urethane, urea, secondary amine; the HCl salt form provides stability for the solid form of M-PEG-NH2 [7, 19, 22-26]
≥ 95% Monodisperse Methoxy PEG5 Amine and Methoxy PEG6 Amine. Attaches via stable linkages, such as amide, urethane, urea, secondary amine. JenKem Technology’s monodisperse PEG products are produced via very reproducible chemical reactions and lack the polydispersity of traditional PEG polymers.
Homobifunctional Amine PEGs
PEG PRODUCT SUBSTITUTION REACTIVITY DETAILS
≥ 95% Amine PEG Amine (PEG diamine). PEG Crosslinker, attaches via stable linkages, such as amide, urethane, urea, secondary amines. [8-18]
≥ 95% Monodisperse Amine PEG8 Amine or Amine PEG12 Amine (Discrete PEG bisamine). PEG Crosslinker, attaches via stable linkages, such as amide, urethane, urea, secondary amines. JenKem Technology’s monodisperse PEG products are produced via very reproducible chemical reactions and lack the polydispersity of traditional PEG polymers. [20, 21]
Heterobifunctional Amine Functionalized PEGs:
Multiarm Homofunctional PEGs Functionalized with Amine:
Multiarm Heterobifunctional PEGs Functionalized with Amine and Protected Amine:

 

References:
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  8. Zhang, T., et al., Magnetic/pH dual-responsive nanocomposites loading doxorubicin hydrochloride for cancer therapy, Micro & Nano Letters, 2019.
  9.  Jain, S., et al., Estradiol functionalized multi-walled carbon nanotubes as renovated strategy for efficient gene delivery, RSC Advances, 2016, 6(13):10792-801.
  10. Mou, J., et al., A New Green Titania with Enhanced NIR Absorption for Mitochondria-Targeted Cancer Therapy, Theranostics, 2017, 7(6):1531-1542.
  11. Chen, N., et al., Cy5.5 conjugated MnO nanoparticles for magnetic resonance/near-infrared fluorescence dual-modal imaging of brain gliomas, Journal of Colloid and Interface Science, 2015, V. 457, P. 27-34.
  12. Liu, S., et al., Meter-long multiblock copolymer microfibers via interfacial bioorthogonal polymerization, Adv. Mater., 2015.
  13. Zhang, T., et al., Targeted nanodiamonds as phenotype-specific photoacoustic contrast agents for breast cancer, Nanomedicine, 2015, V. 10:4 , P. 573-587.
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  19. Li, Z., et al., Self-sterilizing diblock polycation-enhanced polyamidoxime shape-stable blow-spun nanofibers for high-performance uranium capture from seawater, Chemical Engineering Journal, 2020, V. 390.
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  21. Zhou, J., et al., In vivo evaluation of medical device-associated inflammation using a macrophage-specific positron emission tomography (PET) imaging probe, Bioorganic & Medicinal Chemistry Letters, 2013, 23(7): p. 2044-2047.
  22. Xia, C., et al., Redox-responsive nanoassembly restrained myeloid-derived suppressor cells recruitment through autophagy-involved lactate dehydrogenase A silencing for enhanced cancer immunochemotherapy, Journal of Controlled Release, 2021, V. 335, P. 557-574.
  23. Lv, F., et al., Enhanced mucosal penetration and efficient inhibition efficacy against cervical cancer of PEGylated docetaxel nanocrystals by TAT modification, Journal of Controlled Release, 2021, V. 336, P. 572-582.
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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 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.