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Protein Production (E. coli)


custom-protein expression and production service

Recombinant Protein Production Service (E. coli)


5-Star Google Review
Biomatik has been proudly serving 10,000+ scientists since 2002. If you cannot find a protein from our extensive protein catalog to suit your research needs, then our custom protein production service team can help. Our custom protein production service utilizes our proprietary codon optimization algorithm and in-house gene synthesis technology to offer customers the best customized research products at affordable prices. Our numbers speak for themselves, with 12 years of extensive experience in custom protein expression and over 95% success rate in E. coli recombinant protein expression projects, you can be sure your protein productions are in good hands.

Please check out our Risk-free E. coli Protein Expression Service Packages and sample QA report. We offer risk free guarantee for most proteins (10kDa ~ 80kDa) from E. coliNo Protein, No Charge. It is free of charge if we are not able to produce the protein. View select publications featuring custom recombinant protein production by Biomatik:

Risk-free E. coli Protein Service PackagesService ContentsKey DeliverablesPrice & EDT
Package #PE2001-E-T
Risk-free Guaranteed E. coli Protein Package

from gene synthesis to tagged protein purification

Tag option: His tag or GST tag
Purity: 85% /90% /95%
Quantity: from milligrams to grams

No Protein, No Charge. High Success Rate >95%.
Optional service: Endotoxin removal
Optional service: pAb or mAb production
Phase I: Gene Synthesis & Cloning
- Codon optimization and Gene synthesis
- Sub-cloning into expression vectors
- Plasmid preparation

Phase II: Protein Expression & Purification
- Pilot expression optimization
- Scale up expression
- Purification (affinity purification)

- Tagged Protein
- Project Report & QC Data

*Guaranteed Purity & Quantity,
or Free of Charge!

from $1,890
6-8 weeks
Package #PE2001-E-TF
Risk-free Guaranteed E. coli Protein Package

from gene synthesis to tag-free protein purification

Tag option: Tag-free (through tag-free production) 
Purity: 85% /90%
Quantity: from milligrams to grams

No Protein, No Charge. High Success Rate >95%.
Optional service: Endotoxin removal
Phase I: Gene Synthesis & Cloning
- Codon optimization and Gene synthesis
- Sub-cloning into expression vectors
- Plasmid preparation

Phase II: Protein Expression & Purification
- Pilot expression optimization
- Scale up expression
- Tag-free purification (SEC and ion exchange)
- QC by SDS-PAGE & LC-MS-MS (optional)

- Tag-free Protein
- Project Report & QC Data

*Guaranteed Purity & Quantity,
or Free of Charge!

from $2,970
6-9 weeks
•  Risk-free Guarantee: No Protein, No Charge! We guarantee to produce the requested protein quantity & purity, or it is free of charge! 
•  Free gene synthesis & subcloning. No setup fee.
•  Biomatik's tag-free protein production is unlike the traditional tag removal process. Our tag-free protein starts with tag-free protein expression, and purified by SEC and ion exchange to ensure proper native folding. Customers receive high quality protein with no trace of the affinity tag since no tag removal involved in production.
•  If the expressed protein is insoluble (expressed as inclusion body), refolding will be attempted to make it soluble.
•  Protein purity is determined by SDS-PAGE, and quantity is determined by Bradford assay.
•  Protein is delivered in freeze powder whenever possible (in neutral buffer before lyophilization: 1x PBS, pH 7.4). If protein is delivered in solution form, the default buffer is: 1 x PBS, 50% Glycerol, pH 7.4.

Tag-free Protein Production Service from Biomatik

A tag-free protein is very crucial for many R&D experiments. The conventional recombinant protein production introduces different tags (typically His-tag or GST-tag) to carry out protein expression and purification. Unfortunately, these tags cannot all be removed and can create real issues in downstream applications. Unlike traditional post-production tag removal, Biomatik's tag-free protein production service ensures proper native folding, and no trace of the affinity tag (no tag cleavages). Our customers can now count on us for truly "tag-free" proteins at highly affordable prices.

Endotoxin Removal Service from Biomatik

Endotoxins are associated with the outer cell membrane of gram-negative bacteria such as E. coli. The major component of the outer cell wall membrane is composed of Lipopolysaccharides (LPS) which can elicit a range of inflammatory responses in the mammalian hosts and can often be detrimental to such host systems. It is necessary to remove these endotoxins from the final protein preparation for downstream applications involving in vivo studies or cell-based assays. Biomatik’s Endotoxin Removal Service can be added as part of your custom protein expression service, and we can reduce the endotoxin level to below 1EU/ug with great success.



Why Choose Biomatik?

Biomatik has been trusted among top scientists and researchers from around the world for quality products and custom services since 2002. To date, Biomatik has delivered 70,000+ custom made products to our customers worldwide. Learn why Biomatik has been trusted by thousands of researchers worldwide by viewing our customer testimonials, selected publications and 3,000+ publications citing our fine products and services at Google Scholar.

"Our main concern is both of them are hydrophobic with very limited solubility. Biomatik started the protein production process from codon optimization and gene synthesis, the solubility of proteins we got were significantly improved. When we applied these proteins to our ELISA diagnostic assay, they all keep showing highly specific reactivity and very low background. We are very satisfied with the qualities of these proteins. Biomatik run the whole processes very efficiently and we always get our proteins quickly. Their customer support also works well with many helpful professional advices. So we strongly recommend the protein preparation service of Biomatik. Thanks again for your good job." 
Dr. Jia, Centers for Disease Control and Prevention, Atlanta, GA, USA

“We are very satisfied with the polypeptide antibodies you produced for us. They work great for both WB and immunostaining (so far we tested). They are very strong and specific (for WB, I can use at 1:5k-10k dilution). Previously we had bad experience with peptide antibodies from other companies. This is the first time we have nice peptide antibodies. In addition, I like your service and time frame. Also your price is reasonable. I think I will continue use your service in the future.” 
Dr. Hong Han, Dept. of Biology, McGill University, Montreal, Quebec, Canada

Biomatik Protein Production Quotation and Ordering

Our custom protein expressoin/purification quote request and and ordering processes involve 3 simple steps:
1. Submit your protein sequence information and project specifications online.
2. Our Technical Support personnel will propose a project price quote and answer any technical questions regarding your recombinant protein(s).
3. Initiate production by providing a formal PO or pay with credit card through our online ordering system.


Phase I: Gene Synthesis

  • Codon optimization for specific expression system
  • Gene Synthesis
  • Sub-cloning into expression vectors
  • Timeline: ~3 weeks


Phase II: Protein Expression and Purification

  • Pilot expression optimization
  • Scale up expression
  • Purification
  • QC by SDS-PAGE and Western Blot (for tagged proteins)
  • Timeline: 2-4 weeks


Additional Services (optional)

  • Endotoxin Removal. Timeline: 1-2 weeks
  • Antibody Production. Timeline: 2-3 months for pAb, 5-6 months for mAb. 


Protein Expression and Purification Service FAQs

Below are some frequently asked questions about our Peptide Synthesis service. If you have any other questions, please contact us at and we will be happy to assist you.

1. What is the typical turn-around time for custom protein productions?
Our typical turn-around time is 6-8 weeks for custom protein productions. The turn-around time could vary depending on the complexity of the protein properties and if additional service such as endotoxin removal is requested.

2. How do you ship and how long does it take to reach me?
Recombinant proteins are typically delivered in lyophilized format (unless otherwise requested) and shipped on dry ice. The shipment is sent by overnight delivery within USA/Canada, and may take 3-4 days to reach researchers in other countries.

3. What QC data do you provide and how do you determine purity?
Quality assessment and purity determination of the custom protein is done by SDS-PAGE/Coomassie staining. His-tag proteins will also be assessed by western-blot analysis, while tag-free proteins can be assessed by optional LC-MS-MS analysis.

4. What if the protein expression construct does not express well?
On rare occasions, despite our optimization efforts, the plasmid construct does not yield optimal protein expression level on the first attempt. There are several approaches we may take to troubleshoot; we may re-clone the gene sequence into a different expression vector, we may use different E. coli strains, or we may optimize the induction/expression conditions. Rest assured, we will not give up until all options have been explored which accounts for our high success rate.

5. I will be using the recombinant protein for antibody production, are there any specific requirements I need to consider for my custom protein production?
- The protein antigen should be dissolved in neutral buffer such as PBS.
- His-tag is the preferred tag due to its small size and less likely to elicit background response.
- Higher purity such as >90% is recommended.
- Contact us if you are interested in our custom antibody production service:

Contact Information


Please obtain a quote before ordering, and refer to the quote number when you place an order. Orders are typically confirmed within 24 hours.

  • Have a Question? Email us
  • Order Online: Order and Payment Form
  • By Fax: 1-877-221-3515 (USA/Canada) or 1-519-231-0140 (International)
  • By Phone: 1-800-836-8089 (USA/Canada) or 1-519-489-7195 (International)




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