Strasbourg – May 18, 2010 – Polyplus-transfection® SA, a privately-held company developing innovative solutions for molecular and cellular biology, announced today that Kempbio, Inc., a company dedicated to providing high quality bioservices to the biotechnology and biopharmaceutical industry, has signed a license agreement to use polyethylenimine (PEI) for the transfection of cells used for the production of recombinant proteins.

By signing this license, Kempbio becomes one of Polyplus’ sub-licensees for the use of PEI technology for the expression of proteins on milligram and gram scales using the human cell line HEK-293 and other mammalian host cells. The production of recombinant proteins in human cell lines results in authentic human post-translational processing providing advantages for the stability and biological activity of proteins useful in the development of human therapeutics and diagnostic reagents.

“We are truly delighted to sign this license agreement with Kempbio, a company offering quality cell culture and protein expression services,” said Mark Bloomfield, CEO of Polyplus-transfection. “PEI is clearly the reagent of choice for research into large-scale mammalian transient transfection, and this agreement allows Kempbio to use PEI for its transfection services offering. Our business relationship with Kembio also demonstrates the significant value of our intellectual property rights in the field of PEI mediated nucleic acid delivery.

Financial terms were not disclosed.

About Kempbio, Inc. Kempbio, Inc. is a new company with a solid foundation in the bioservices industry. Our scientists have been successfully developing processes and expressing proteins for biotechnology and biopharmaceutical research programs for over 15 years. Our expertise in mammalian cell culture and the baculovirus expression system ensure optimal results for your expression project. Kempbio, Inc. is focused on technologies that we have mastered and we offer high-quality services to meet your research
For additional information please contact Kempbio at:

Polyplus-transfection – Kempbio (Version version)

Polyplus-transfection – Kempbio (French version)