BESTcell™ Stable Mammalian Cells - for Research AND BioProduction

3 weeks from transfection to isolated high productivity clones

Bridging the gap between early preclinical research and GMP production


Our BAC-based Expression System Technology in mammalian cells (BESTcellTM) utilizes a stable chromosomal region with an active gene environment, rather than specified simple genetic elements. For molecular cloning we use Bacterial Artificial Chromosome (BAC) vectors encompassing a full locus of a mammalian transcription hotspot comprising all chromatin and gene regulatory elements further enhanced by a strong promoter. Multiple and stable integration of these 200kb large loci into host chromosomes results in extremely high product yield and titer (until now up to 100 pcd). The technique can be used for expression of complex glycoproteins and monoclonal antibodies in e.g. CHO or HEK cells. Even with difficult to express proteins, we routinely observe 10 fold higher specific productivity as compared to conventional systems in small scale production and after upscaling in a bioreactor, respectively.


We currently offer cell line development for companies in need of stable, high producing cell lines under non-GMP conditions.


We are looking for partners to utilize our BESTcell™ technology for the development of GMP-documented production cell lines and cell banks.


For further information please contact Anton Bauer


You may meet us at:


12-14 March 2018

BioEurope Spring, Amsterdam, Netherlands


23-25 April 2018

Cell Line Development & Engineering, Europe, Amsterdam, Netherlands


4-7 June 2018

BIO, Boston, USA


12-14 June 2018

Cell Line Development & Engineering, San Francisco, USA


5-7 Nov 2018

BioEurope, Copenhagen, Denmark


12-15 Nov

MEDICA, Düsseldorf, Germany