Rabbit anti-Canine IgG Antibody;HRP conjugated is a secondary antibody developed by immunizing rabbits with purified dog IgG. The antibody is then purified (typically via affinity chromatography) and conjugated to horseradish peroxidase (HRP) enzyme. The resulting conjugate serves as a detection reagent that:
Binds specifically to dog/canine IgG in various immunological assays
Converts substrate (such as DAB) into visible colored products through HRP enzymatic activity
Enables quantitative and qualitative detection of canine IgG in research applications
The antibody recognizes both heavy and light chains of canine IgG, making it suitable for detecting intact IgG molecules or their fragments in various sample types .
Based on technical validation data, Rabbit anti-Canine IgG;HRP conjugated has been confirmed for use in multiple applications:
Application | Validated Dilution Range | Notes |
---|---|---|
Western Blot (WB) | 1:2000-10000 | Optimal for detecting canine IgG in protein samples |
ELISA | 1:4000-15000 | Higher dilutions possible due to high sensitivity |
Immunohistochemistry-Paraffin (IHC-P) | 1:200-1000 | For formalin-fixed tissue sections |
Immunohistochemistry-Frozen (IHC-F) | 1:200-1000 | For frozen tissue sections |
Immunoprecipitation (IP) | 1:2000-10000 | For pulling down canine IgG complexes |
Immunocytochemistry (ICC) | 1:200-1000 | For cellular localization studies |
Optimal working dilutions should be determined empirically by each researcher for their specific experimental conditions .
Sample preparation varies by application but generally requires:
For Western Blotting:
Sample denaturation in appropriate buffer (reducing or non-reducing depending on epitope requirements)
Complete protein transfer to membrane (nitrocellulose or PVDF)
Effective blocking with 3-5% non-fat dry milk or BSA in PBST/TBST
Appropriate primary antibody incubation before applying the Rabbit anti-Canine IgG Antibody;HRP
For ELISA:
Coating plates with target antigen or capture antibody
Thorough washing between steps to reduce background
Sample dilution in appropriate buffer to minimize matrix effects
Optimization of primary antibody concentration
Use of appropriate blocking buffer to prevent non-specific binding
For Immunohistochemistry:
Proper fixation (formalin-fixed for IHC-P, fresh-frozen for IHC-F)
Antigen retrieval if using paraffin sections
Peroxidase quenching to reduce endogenous peroxidase activity
Tissue permeabilization when necessary
Proper blocking with serum from the same species as the secondary antibody
The Rabbit anti-Canine IgG Antibody;HRP conjugated is typically supplied in:
PBS (pH 7.4)
Containing 0.02% NaN3 (sodium azide) as preservative
50% glycerol for stability
For applications, recommended buffer systems include:
Dilution Buffer:
PBS or TBS (pH 7.4)
0.05-0.1% Tween-20
1-5% blocking protein (BSA or non-fat dry milk)
Wash Buffer:
PBS or TBS (pH 7.4)
0.05-0.1% Tween-20
Substrate Buffer:
Storage Conditions:
Store at 4°C for frequent use (short-term)
For long-term storage, aliquot and store at -20°C
Avoid repeated freeze-thaw cycles (less than 5 cycles recommended)
Protect from light exposure
Stability Data:
Thermal stability has been assessed through accelerated degradation testing. Results show less than 5% loss of activity when incubated at 37°C for 48 hours, indicating excellent thermal stability for standard laboratory conditions. When stored properly at -20°C, shelf life is typically:
1 year minimum
Up to 2 years without detectable loss of activity
Working Solution Stability:
Diluted working solutions maintain activity for approximately 12-24 hours at room temperature
Diluted solutions can be stored at 4°C for up to 1 week with minimal loss of activity
Comparison with Other Host Species:
Host Species | Advantages | Limitations |
---|---|---|
Rabbit (anti-dog) | - High affinity - Good specificity - Robust supply source - Minimal cross-reactivity with rodent IgG | - May cross-react with other carnivore IgG - Higher cost than some alternatives |
Goat (anti-dog) | - Often higher yield in production - Good for multilabel experiments when rabbit primary is used | - May show higher background in canine tissues - Different glycosylation pattern affecting some applications |
Horse (anti-rabbit) | - Useful in complex detection systems - Polymer-based amplification systems available | - Not primary anti-dog reagent - Used in multi-step detection systems |
Comparison with Other Detection Systems:
Detection System | Advantages | Limitations |
---|---|---|
HRP Conjugation | - High sensitivity - Multiple substrate options - Stable signal - Compatible with automation | - Potential endogenous peroxidase interference - Photobleaching with some substrates |
Biotin Conjugation | - Signal amplification possible - Flexible detection options | - Endogenous biotin interference - Additional detection step required |
Fluorescent Conjugation | - Direct visualization - Multiplexing capability - No substrate needed | - Photobleaching - Special equipment required - Higher background in some tissues |
Rabbit anti-Canine IgG Antibody;HRP provides an excellent balance of specificity, sensitivity, and ease of use for most standard immunoassay applications .
High background is a common issue that can compromise data quality. Common causes and solutions include:
Causes of High Background:
Insufficient blocking
Excessive antibody concentration
Inadequate washing
Cross-reactivity with non-target proteins
Endogenous peroxidase activity (especially in tissues)
Sample-specific interference
Methodological Solutions:
Problem | Solution Method |
---|---|
Insufficient blocking | - Increase blocking time (1-2 hours) - Try different blocking agents (BSA, casein, normal serum) - Increase blocker concentration (3-5%) |
Excessive antibody | - Perform titration experiments to determine optimal concentration - Use higher dilutions (start with 2-5x higher than recommended) - Reduce incubation time |
Inadequate washing | - Increase number of wash steps (5-6 washes) - Extend washing time (5-10 minutes per wash) - Include 0.1-0.3M NaCl in wash buffer to reduce non-specific ionic interactions |
Cross-reactivity | - Pre-adsorb antibody against problematic species proteins - Use more specific primary antibody - Test cross-adsorbed secondary antibody formulations |
Endogenous peroxidase | - Include peroxidase quenching step (0.3% H₂O₂ in methanol for 30 min) - Use alternative detection systems for tissues with high peroxidase activity |
Sample interference | - Dilute samples further - Use detergent-based sample buffers - Consider alternative blocking reagents specific to sample type |
These approaches should be systematically tested to determine which intervention provides optimal signal-to-noise ratio for your specific experimental conditions .
Researchers can employ several validated strategies to enhance signal intensity without compromising specificity:
Methodological Approaches for Signal Enhancement:
Amplification Systems:
Utilize tyramide signal amplification (TSA) compatible with HRP
Consider polymer-based detection systems like ImmPRESS for increased enzyme density
Implement avidin-biotin complexes as intermediate amplification step
Substrate Optimization:
Select high-sensitivity substrates like SuperSignal® for Western blotting
Use DAB enhancement with metal ions (cobalt or nickel) for IHC applications
Extend substrate development time with monitoring
Antibody and Sample Handling:
Reduce the antibody dilution stepwise to find optimal concentration
Test longer incubation times at 4°C (overnight)
Increase sample concentration/loading
Buffer Modifications:
Add 0.1% Triton X-100 to improve tissue penetration in IHC
Include 5% polyethylene glycol in antibody diluent to enhance reaction kinetics
Adjust pH slightly (±0.5 units) to optimize binding conditions
Each approach should be validated empirically with appropriate controls to ensure that increased signal corresponds to true target detection rather than non-specific binding .
Rabbit anti-Canine IgG Antibody;HRP conjugated can be effectively integrated into automated immunostaining workflows with specific protocol adaptations:
Platform Compatibility Data:
Studies have demonstrated compatibility with major automated platforms including Dako Autostainer Plus, Leica Bond Rx, and Ventana Discovery Ultra systems . For optimal results:
Protocol Modifications for Automation:
Platform | Recommended Adaptations | Performance Optimization |
---|---|---|
Dako Autostainer | - Reduce incubation time to 20-30 minutes - Increase wash cycles to 5-6 - Use Dako-compatible antibody diluent | - Program dual application for difficult samples - Include post-polymer wash buffer with 0.3% Tween-20 |
Leica Bond | - Set bond protocol to "F" for fixed tissues - Use bond enzyme pretreatment (if needed) - Implement 3-minute post-antibody wash | - Reduce primary antibody concentration by 20% - Increase stringency of post-secondary wash |
Ventana Systems | - Use antibody diluent with background reducing components - Program extended wash cycles (option 3) - Set incubation at 37°C | - Optimize with mild CC1 pretreatment - Consider "ultra" washing protocol |
When working with complex samples or examining cross-species reactivity, several critical factors require attention:
For Complex Tissue Samples:
Tissue-Specific Optimization:
Adjust fixation time (6-24 hours) based on tissue density and epitope sensitivity
Implement graded alcohol dehydration for fatty tissues
Use controlled heat-induced epitope retrieval (HIER) methodology with pH optimization
Consider tissue-specific blocking reagents (e.g., avidin/biotin blocking for liver, kidney)
Background Reduction in Problem Tissues:
For tissues with high endogenous biotin (liver, kidney): use biotin blocking kit prior to antibody application
For tissues with high endogenous peroxidase (spleen, bone marrow): double peroxidase quenching (3% H₂O₂, 15 min, repeat)
For tissues with high non-specific binding (brain, fat): include 0.1-0.3% Triton X-100 in all buffers
For Cross-Reactivity Studies:
Documented Cross-Reactivity:
The Rabbit anti-Canine IgG Antibody has been tested for reactivity with IgG from different species:
Pre-adsorption Strategies:
When working with samples containing multiple species proteins:
Careful validation with appropriate controls is essential when extending the use of these reagents beyond their primary intended applications .
Recent advances have expanded the utility of Rabbit anti-Canine IgG Antibody;HRP in several cutting-edge research areas:
Emerging Research Applications:
Immune Tolerance Studies:
Research has demonstrated the value of these antibodies in monitoring immune tolerance to enzyme replacement therapy in canine models of mucopolysaccharidosis I. These studies utilize ELISA methods with Rabbit anti-Canine IgG Antibody;HRP to measure antibody responses to therapeutic proteins, providing critical data for translational medicine .
Comparative Immunopathology:
These antibodies have proven valuable in investigating atrophic lymphocytic pancreatitis in specific dog breeds (German shepherd dogs and rough-coated collies). Using immunohistochemistry techniques with Rabbit anti-Canine IgG;HRP enables researchers to map immune complex deposition and assess humoral immune responses in naturally occurring canine disease models .
Multiplexed Analysis Systems:
Advanced research is employing Rabbit anti-Canine IgG Antibody;HRP in:
Multiplex bead-based immunoassays for simultaneous detection of multiple canine biomarkers
Microarray platforms for high-throughput antibody profiling
Tissue-based multiplexed immunohistochemistry for spatial protein analysis
Specialized Detection Strategies:
Implementation in proximity ligation assays (PLA) for detecting protein-protein interactions
Incorporation into chromogenic in situ hybridization protocols as detection reagents
Adaptation for use in extracellular vesicle characterization studies
Researchers pursuing these advanced applications should implement rigorous validation steps and consider specialized protocol adaptations to ensure optimal performance in these novel contexts .