Bacteria are the most widely used protein expression systems for their rapid growth, high yield, ease of manipulation and scale-up. The most widely used bacteria host is of course Escherichia coli. E. coli is the most established tool and is almost always the first choice if applicable. Profacgen offers various E. coli strains and expression vectors to seek for high-quality and high-level production of your target proteins.http://www.profacgen.com/bacteria-expression.htm