About Us

Nebulabio is a world-leading provider of custom antibody development services, with specialized expertise in the generation of high-performance Rabbit Monoclonal Antibodies. With over 15 years of dedicated experience in rabbit immunology and advanced hybridoma technology, we have established ourselves as the partner of choice for researchers and diagnostic developers who require antibodies with exceptional affinity, specificity, and versatility. Our platform overcomes the limitations of traditional mouse systems, consistently yielding antibodies against targets that are highly conserved between mice and humans or are poorly immunogenic in rodents. Our team of expert scientists manages the entire process—from sophisticated antigen design and ethical immunization to cutting-edge fusion techniques, high-content screening, and rigorous validation. We are committed to delivering not just an antibody, but a robust, well-characterized, and critical reagent that excels in the most demanding applications, from multiplex immunohistochemistry to phospho-specific detection.

☞Why Choose Nebulabio’s Rabbit Monoclonal Antibody Service?

Developing a high-quality rabbit monoclonal antibody requires specialized knowledge and optimized protocols. Our service offers distinct advantages that translate directly into your project's success.

• Unparalleled Expertise in Rabbit Immunology: Our team possesses deep, specialized knowledge of the rabbit immune system. We have optimized every step—from unique antigen design strategies for low-immunogenicity targets to proprietary immunization schedules and superior fusion partners—resulting in industry-leading success rates for challenging projects.

• Proven Track Record with Difficult Targets: We excel where others struggle. We have a documented history of successfully generating high-affinity rabbit monoclonals against highly conserved proteins, post-translational modifications (phosphorylation, acetylation), small peptides, and complex membrane proteins, providing you with reagents that may be unattainable through mouse systems.

• Application-Focused Development from Day One: We don't just screen for binding; we screen for performance. Our secondary screening phase is tailored to your final application (e.g., IHC, Western blot, neutralization). This ensures the lead antibodies we deliver are not just ELISA-positive but are fully functional and validated in the context you need, saving you months of in-house optimization.

• End-to-End Project Management & Transparency: You are assigned a dedicated project manager who provides regular, detailed updates at every milestone, including serum titer reports, fusion efficiency data, and screening results. We believe in collaborative partnership, ensuring you are informed and involved throughout the entire journey.

• Commitment to Quality & Long-Term Supply: We guarantee the genetic stability of your hybridoma through rigorous subcloning and the creation of a secure Master Cell Bank. This, combined with our professional purification and comprehensive QC (including application-specific validation), ensures you receive a consistent, high-purity reagent and a perpetual source for future needs.

• Faster Path to Superior Reagents: Leveraging our optimized platform and experience, we streamline the development timeline without compromising quality. You gain access to the superior affinity and specificity of rabbit antibodies through an efficient, reliable process managed by experts.

☞What is a Rabbit Monoclonal Antibody?

A Rabbit Monoclonal Antibody (RabMAb®) is a homogeneous population of identical antibody molecules derived from a single clone of rabbit B-cells. Similar to mouse monoclonal antibodies, they are produced by fusing antibody-producing lymphocytes from an immunized rabbit with an immortal myeloma cell line, creating a stable hybridoma that secretes antibodies targeting a single, specific epitope.

However, the rabbit immune system offers distinct and powerful advantages:

• Higher Affinity Antibodies: Rabbits often generate antibodies with higher average affinity compared to mice, due to a more diverse initial antibody repertoire and a robust affinity maturation process.

• Superior Specificity: Rabbit antibodies can recognize a broader range of epitopes, including many that are invisible to the mouse immune system. This is particularly valuable for targets that are highly conserved across species or have low immunogenicity.

• Enhanced Performance in IHC and IF: Rabbit monoclonal antibodies frequently exhibit superior performance in immunohistochemistry (IHC) and immunofluorescence (IF) applications. Their high affinity allows for sensitive detection with low background, and they are less prone to non-specific binding to endogenous immunoglobulins in human and mouse tissues (as rabbit IgG does not bind to human Fc receptors as readily as mouse IgG).

• Ideal for Phospho-Specific Antibodies: Rabbits mount strong immune responses to small, modified peptides (e.g., phosphorylated, acetylated), making them the premier host for developing sensitive and specific phosphorylation-state-specific antibodies crucial for signaling research.

• Larger Serum Volume: A single rabbit yields a significantly larger volume of serum and spleen cells compared to a mouse, supporting more extensive screening and larger-scale initial antibody production.

☞Rabbit Monoclonal Antibody Development Process

Nebulabio’s development process is a refined, multi-stage pipeline specifically optimized for the rabbit system, ensuring the highest probability of success for challenging targets.

 Phase 1: Strategic Antigen Design & Immunization 

• Expert Consultation: We advise on optimal immunogen design, especially critical for peptides, haptens, or conserved proteins. This may involve specific peptide modifications or novel carrier protein strategies.

• Ethical Immunization Protocol: Rabbits are immunized with a customized regimen using optimized adjuvants. We often employ a longer immunization schedule (8-12 weeks) to promote thorough affinity maturation.

• Serological Monitoring: Regular test bleeds are analyzed by ELISA to track the development of a high-titer, antigen-specific immune response before proceeding to fusion.

 Phase 2: Lymphocyte Isolation & Fusion Technology 

• Lymphocyte Harvest: Peripheral blood lymphocytes (PBLs) or splenocytes are harvested from the hyper-immunized rabbit. Using PBLs allows for multiple collections from the same animal.

• Fusion Partner & Technique: We utilize proprietary rabbit myeloma fusion partners or advanced heteromyeloma fusion partners. The fusion is performed using electrofusion technology, which offers higher efficiency than traditional PEG fusion for rabbit cells, increasing the number of viable hybridomas.

 Phase 3: Sophisticated Screening & Selection 

• Primary High-Throughput Screening: Supernatants from thousands of hybridoma cultures are screened via ELISA to identify antigen-specific antibody producers.

• Secondary Functional & Application-Specific Screening: Positive clones are immediately evaluated in the client’s intended final application (e.g., Western blot, IHC on relevant tissue, flow cytometry). This critical step ensures selected leads are not just binders, but functional reagents.

• Epitope Mapping/Binning (Optional): For projects requiring non-competitive antibodies (e.g., for sandwich ELISA pairs), we can perform epitope binning analyses on the lead clones.

 Phase 4: Subcloning & Cell Line Stabilization 

• Limiting Dilution Cloning: Selected hybridomas undergo multiple rounds of limiting dilution to guarantee monoclonality and genetic stability.

• Master Cell Bank Creation: The stable, monoclonal rabbit hybridoma cell line is expanded, thoroughly characterized, and cryopreserved to create a Master Cell Bank (MCB), securing a permanent source of your antibody.

 Phase 5: Recombinant Expression & Production (Alternative Path) 

• Gene Cloning & Stable Cell Line Generation: For antibodies destined for large-scale therapeutic or diagnostic manufacturing, we can clone the rabbit antibody variable regions and express them as recombinant antibodies in mammalian systems (e.g., CHO cells), ensuring scalability and consistent quality.

☞Applications of Rabbit Monoclonal Antibodies

The superior properties of rabbit monoclonal antibodies make them the preferred choice for a wide range of advanced applications:

■ Advanced Histopathology & Biomarker Discovery:

• Multiplex Immunohistochemistry (mIHC): Their high specificity and low background are ideal for detecting multiple biomarkers simultaneously on a single tissue section.

• Rare Cell Detection: Exceptional sensitivity allows for reliable detection of low-abundance targets in tissue samples.

■ Cell Signaling & Phosphoproteomics Research:

• Phospho-Specific Antibodies: The gold standard for studying dynamic protein phosphorylation events in pathways related to cancer, neuroscience, and immunology.

• Flow Cytometry for Signaling: Enables precise analysis of phosphorylated signaling proteins at the single-cell level.

■ In Vitro Diagnostics (IVD) Development:

• High-Performance Assay Reagents: Used as critical components in companion diagnostics, clinical-grade ELISA kits, and automated platforms where high sensitivity and specificity are non-negotiable.

■ Challenging Target Detection:

• Western Blotting for Low-Abundance Proteins: High affinity enables clear detection of proteins that are difficult to visualize with mouse monoclonals.

• Immunoprecipitation (IP) & Mass Spectrometry: Efficiently pull down protein complexes for subsequent analysis due to strong antigen binding.

■ Therapeutic Antibody Discovery:

• Lead Candidate Generation: Rabbit-derived sequences can serve as excellent starting points for humanized therapeutic antibodies, often providing superior initial affinity and specificity.

☞Applications of Rabbit Monoclonal Antibodies

Our client-focused workflow ensures a seamless, transparent, and collaborative partnership from concept to validated reagent.

 Nebulabio Service Process Flowchart: 

Partner with Nebulabio to leverage the superior power of the rabbit immune system. Our expert-driven Rabbit Monoclonal Antibody Development Service is designed to deliver the high-performance, specific reagents you need to push the boundaries of your research and diagnostic development.