Pseudomonas fluorescens

Pseudomonas fluorescens is a nonpathogenic (BSL-1), Gram-negative, obligately aerobic, bacterium

All of the Pfēnex toolbox strains are derived from a single natural isolate of P. fluorescens biovar I, designated as strain MB101

The organism has a history of more than 20 years of safe use for the production of recombinant proteins

The genome has been sequenced and is nearly 40% larger than that of E. coli, providing superior metabolic diversity

P. fluorescens is a robust fermentation organism delivering high cell densities and product yields

Full range of effective genetic and molecular biology tools available

Development and production media are defined and so free of any animal-derived components and plasmid maintenance has even been engineered so that antibiotics are not required