Escherichia coli Bacillus subtilis Bacillus megaterium Pseudomonas fluorescens
Pichia pastoris Saccharomyces cerevisiae Schizosaccharomyces pombe Hansenula polymorpha Filamentous fungi
Baculovirus-mediated expression in "Spodoptera frugiperda" and "Trichoplusia ni" cells
Chinese hamster ovary (CHO) cultured cells Human Embryonic Kidney (HEK) 293 cultured cells (Transient transfection). Human Embryonic Kidney (HEK) 293 cultured cells (Flp-In System).
Algae Chloroplasts Nicotiana tabacum
Try Rosetta cells
If you are trying to express non-bacterial protein, it is quite likely that your gene of interest contains rare codons and thus E.Coli can't express it well. Rosetta and Rosetta 2 cells (available from Novagen) are designed to overcome this problem. For human proteins, expression levels may sometimes change from "I need to enrich the protein batch on affinity column before I can see protein on the gel" to "80% of the protein in the lysed cells is my protein of interest".
--Artem 02:43, 11 February 2008 (CET)