LifeTein provides recombinant protein expression in E. coli systems for rapid, scalable, and cost-efficient production of proteins for research use. This service is best suited for projects that require fast turnaround, practical scale-up, and straightforward purification without the need for mammalian post-translational modification.
Our bacterial expression workflow supports projects from gene design to purified protein. It is commonly used for enzyme studies, structural biology, antigen preparation, assay reagents, and general recombinant protein production where speed and yield are important.
| Expression system | E. coli bacterial expression |
| Typical use | Fast, economical production of recombinant proteins for research applications |
| Workflow | Gene synthesis, cloning, expression screening, purification, and optional refolding support |
| Scale | From analytical / assay scale to multi-liter production |
| Tags | His, GST, FLAG, thioredoxin, or other project-appropriate options |
Just provide the gene sequence, plasmid, or protein sequence. LifeTein can support codon optimization, gene synthesis, cloning, bacterial expression, purification, and delivery of recombinant protein.
Different optimized conditions and strains can be evaluated to improve soluble expression and identify practical conditions for production.
Standard tags such as His, GST, FLAG, or thioredoxin can be selected according to the expression and purification needs of the project.
Production can be supplied at flexible scales, from small assay batches to larger multi-liter culture volumes for research use.
For many proteins, bacterial expression remains the most practical first system to evaluate because it is fast, cost-effective, and scalable. It is especially useful when the primary goal is to obtain recombinant protein efficiently rather than to reproduce a fully mammalian modification profile.
Some recombinant proteins expressed in bacteria accumulate as inclusion bodies or insoluble aggregates. In such cases, protein recovery depends on effective refolding into the correct conformation. LifeTein supports refolding workflows designed to improve recovery, reduce protein waste, and provide practical access to soluble material when a target is not directly expressed in soluble form.
Need mammalian expression instead?
For proteins that require post-translational modification, native mammalian folding, or antibody expression workflows, see our Mammalian Protein Expression Service.
| Best use case | E. coli expression Fast, economical production for proteins that do not depend on mammalian processing |
Mammalian expression Proteins requiring correct folding, secretion, post-translational modification, or antibody expression |
| Speed | Typically faster | Typically longer but better suited for biologically sensitive targets |
| Cost | Usually lower | Usually higher due to mammalian cell culture and expression complexity |
| Post-translational modification | Limited | Supports mammalian PTMs and more native protein handling |
| Typical targets | General recombinant proteins, enzymes, antigens, and proteins suitable for bacterial expression | Secreted proteins, glycoproteins, receptors, antibodies, and proteins requiring native mammalian conformation |
How long does a bacterial expression project usually take?
Project timing depends on whether gene synthesis, cloning, optimization, purification, and refolding are needed. In general, bacterial expression is chosen when a faster production route is preferred.
What if the protein does not express well in the first condition?
Alternative tags, strains, and expression conditions can be evaluated. If the target is primarily recovered as insoluble material, refolding options may also be considered.
When should I switch to mammalian expression instead?
If the target depends strongly on eukaryotic folding, secretion, or post-translational modifications for activity, a mammalian system may be more appropriate.
Email your protein expression inquiry to sales@lifetein.com. We will send you a formal quote within 24 hours.