Proteins
Recombinant Proteins
Engineered expression, reproducible purity, and functional activity you can build an assay on.
Recombinant proteins are produced by placing a target gene into a host cell and letting that cell act as a living factory. Compared with extraction from native tissue, recombinant production gives defined sequence, controlled glycosylation choices, scalable yield and — most importantly for assay development — batch-to-batch consistency.
Our catalogue covers two broad families. Growth factors are intercellular signalling proteins — FGF, EGF, VEGF, IGF, BMP and related families — used to drive proliferation, differentiation and stem-cell maintenance. Cytokines include interferons, interleukins, pro-inflammatory cytokines and chemokines that control immune cell function and communication. Both families are supplied with carrier-free options for cell culture and with tags removable on request.
Applications
| Application | Representative examples | When it fits |
|---|---|---|
| Biopharmaceutical development | Insulin, interferon-alpha, growth hormone, vaccine antigens | Process development, formulation screening and immunogenicity studies where a defined, sequence-verified antigen or therapeutic protein is required. |
| Assay & tool enzymes | Taq DNA polymerase, restriction endonucleases, reverse transcriptase | Molecular biology workflows and diagnostic kit manufacturing, where specific activity and lot stability drive the assay's reproducibility. |
| Immunology & cell biology | Recombinant antigens for ELISA and Western blot, CAR-T cytokines | Antibody production, standard curves, cell expansion and signalling pathway studies in serum-free or chemically defined media. |
| Industrial & agricultural use | Detergent enzymes, food-processing enzymes, feed additives | Enzyme replacement in manufacturing and biopesticide development, where cost per unit activity and thermostability matter most. |
Product highlights
- Quality controllability — purity verified by SDS-PAGE and HPLC on every lot, with the report shipped alongside the product.
- Functionally precise — activity confirmed in house (ED50 / binding) and, where relevant, benchmarked against reference standards.
- High yield and high purity — fed-batch fermentation and multi-step chromatography routinely reach ≥95% purity.
- Lower safety risk than native extraction — no dependency on animal or human tissue sourcing.
- Scale-up ready — the same process is used from milligram research vials to multi-gram bulk supply.
Specifications & QC
- Expression systems
- E. coli, Pichia pastoris, Sf9 / baculovirus, HEK293, CHO
- Purity
- ≥90% by SDS-PAGE, ≥95% by HPLC for catalogue items
- Endotoxin
- <1 EU/µg (LAL) on request
- Tags
- His, GST, SUMO, Fc, MBP or tag-free
- Format
- Lyophilised powder or liquid, carrier-free options
- Documentation
- CoA, SDS-PAGE, HPLC trace, mass spec, activity data
Related products & services
- Native ProteinsPurified from natural sources to keep post-translational modifications and true conformational epitopes intact.
- Monoclonal AntibodiesRecombinant and hybridoma monoclonal antibodies validated for WB, IHC, IF, ELISA and flow cytometry.
- E. coli Protein Expression & PurificationSoluble expression, inclusion body refolding and tag removal — from construct to ≥90% pure protein.
Next step
Tell us the target, we will tell you what is feasible
Send the sequence, assay format and sensitivity you need. You will get a technical assessment — recommended platform, timeline and the risks worth knowing before you commit budget.