Nebulabio provides end-to-end recombinant protein expression and purification support across multiple host systems, with an emphasis on technical fit, reproducibility, and traceable analytical evidence. By integrating molecular design, expression routing, scalable production, and multi-modal characterization, we deliver purified proteins aligned to downstream structural, biochemical, and assay requirements. The service is designed to translate a defined gene sequence into a formulated protein preparation with documented identity, purity, and application-relevant integrity.
☞Nebulabio’s Integrated Expression and Purification Platform
We support bacterial production for rapid, high-yield non-glycosylated targets, yeast and insect systems for eukaryotic processing with scalable throughput, and mammalian systems when human-like modifications and native conformational fidelity are required. Downstream purification is designed around product quality attributes such as monodispersity, oligomeric state, and functional integrity.
| ☎ +86-15801534258 | ✉ info@nebulabio.cn | Contact Us ☜☜ |
☞Supported Options
Full Spectrum of Expression Hosts
• Prokaryotic hosts including E. coli for rapid high-yield production of non-glycosylated targets
• Mammalian hosts including HEK293 and CHO for complex proteins requiring human-like processing
• Baculovirus insect cell systems including Sf9 and High Five for eukaryotic folding with scalable throughput
• Yeast systems including Pichia pastoris and Saccharomyces cerevisiae for microbial eukaryotic secretion and production
Vector and Construct Engineering Options
• Promoter systems including constitutive and inducible control architectures aligned to host context
• Fusion tags and secretion signals including His GST MBP Fc and SUMO with configurable cleavage designs
• Construct engineering including codon adaptation truncation variants site-directed mutagenesis and fusion partner panels
Scalable Production and Purification
• Screening-based process definition supporting early feasibility and condition selection
• Production scale flexibility from shake flasks to bioreactors depending on host and target requirements
• Chromatography suite including affinity capture ion exchange hydrophobic interaction and size exclusion
• Specialized handling options including inclusion body refolding endotoxin control and buffer exchange
☞Principle of Recombinant Protein Production
Recombinant protein production relies on heterologous expression of a gene of interest in a selected host, followed by isolation and purification of the expressed product from cellular components or culture medium. The host system determines intracellular processing, folding trajectory, assembly behavior, and the presence of post-translational modifications. Construct architecture influences expression level, solubility, secretion efficiency, and susceptibility to proteolysis. Following expression, the protein is recovered by cell lysis or supernatant capture and purified through chromatography sequences designed to separate the target from host-derived impurities while preserving structural integrity. Final formulation defines buffer composition, stabilizing components, and storage conditions that maintain the protein in a consistent state suitable for downstream use.
☞Nebulabio Service Workflow
Project Consultation and Design We translate sequence context and application requirements into a technically executable expression and purification route. Key Steps • Target assessment including domain architecture modification requirements and solubility risk factors • Host system routing recommendation aligned to processing requirements and timeline context • Construct plan definition including tag secretion design and variant strategy • Acceptance criteria definition for scale purity and configured analytical evidence |
Gene Synthesis and Vector Construction We generate expression-ready DNA constructs aligned to the selected host and production format. Key Steps • Gene synthesis or subcloning with codon adaptation as configured • Vector assembly with promoter tag and selection architecture appropriate to host context • Sequence verification and construct documentation package |
Small Scale Expression and Screening We establish feasibility and define a productive condition set prior to scale-up. Key Steps • Host transformation or transfection aligned to chosen system • Multi-condition expression evaluation with solubility or secretion assessment as applicable • Analytical confirmation supporting route selection and scale decision |
Scale Up Production and Harvest We produce the target at the defined scale and generate harvest material suitable for downstream purification. Key Steps • Scale-up in flasks or bioreactors depending on host and target requirements • Defined harvest strategy including supernatant capture or controlled lysis • Clarification and intermediate handling aligned to stability behavior |
Protein Purification and Polishing We isolate and refine the protein through chromatography sequences designed around target attributes and downstream requirements. Key Steps • Capture chromatography aligned to tag or physicochemical properties • Optional tag removal and cleanup when configured • Polishing by ion exchange hydrophobic interaction or size exclusion to achieve defined purity and homogeneity • Buffer exchange and formulation definition |
Quality Control Characterization and Delivery We generate the final QC package and deliver protein material in a defined formulation with complete documentation. Deliverables • Aliquoted purified protein with specified storage condition • COA including identity purity concentration and configured characterization outputs • Full data package and handling guidance |
☞Featured Applications of Nebulabio’s Services
● Therapeutic and Antibody Development
Mammalian and eukaryotic production routes support complex formats such as Fc-containing proteins and multi-domain constructs where folding and modification state influence comparability across studies. Defined purification and characterization evidence support consistent interpretation in interaction and stability-focused workflows.
● Structural Biology
High-purity homogeneous preparations enable crystallography cryo EM and NMR pipelines where monodispersity and stability determine data quality. Expression routing and polishing strategies are selected to reduce heterogeneity and improve interpretability of structural readouts.
● Diagnostic Format Reagents in Research Settings
Recombinant antigens and binding proteins support assay development formats such as ELISA and biosensor-based interaction measurements in research contexts. Defined formulation and QC documentation support lot comparability and quantitative calibration behaviors.
● Enzyme and Biochemical Research
Bacterial and yeast routes provide efficient access to enzymes kinases and proteases for mechanistic analysis and inhibitor profiling when glycosylation is not required. Purification sequences are designed to preserve active fractions and minimize aggregation-related artifacts.
● Vaccine Antigen Production in Research Pipelines
Insect and mammalian routes support viral glycoproteins and conformational antigens where folding and oligomeric state influence antigenicity. Defined purification and homogeneity evidence improve comparability across antigen panels and experimental settings.
For more information, please contact us at info@nebulabio.cn or +86-15801534258.
