Rabbit anti-Human IgG Fc Antibody;HRP conjugated

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Description

Specificity and Validation Data

The antibody’s specificity has been rigorously validated:

  • Immunoelectrophoresis: Shows a single precipitin arc against human IgG Fc but no reaction with human IgG Fab fragments .

  • ELISA Sensitivity: Detects human IgG at concentrations as low as 0.7 ng/mL .

  • Western Blot: Compatible with chemiluminescent substrates for high sensitivity (e.g., femtomolar detection limits) .

Applications and Recommended Usage

This antibody is versatile across multiple assay formats:

ApplicationProtocol Details
ELISARecommended dilution: 1:5,000–1:20,000; linear detection range: 0.7–200 ng/mL .
Western BlotUse 1:1,000–1:5,000 dilution with chemiluminescent substrates (e.g., ECL) .
ImmunohistochemistryOptimal dilution: 1:100–1:500 in FFPE tissues .
Dot Blot1:2,000 dilution for membrane-based assays .

Advantages in Immunoassays

  • High Specificity: No cross-reactivity with non-human IgG or light chains .

  • Signal Amplification: HRP enables catalytic signal enhancement via chromogenic (e.g., TMB) or chemiluminescent substrates .

  • Stability: Retains activity for ≥1 year at -20°C when properly stored .

  • Low Background: Fc-specific binding minimizes nonspecific interactions in assays involving protein A/G or cellular Fc receptors .

Handling and Stability

  • Reconstitution: Lyophilized formulations require restoration with deionized water (avoid sodium azide, which inhibits HRP) .

  • Buffer Compatibility: Stable in PBS (pH 7.2–7.4) but incompatible with Tris-based buffers at alkaline pH .

  • Lot Consistency: Rigid quality control ensures inter-lot reproducibility for quantitative assays .

Comparative Performance Metrics

Data from independent studies highlight its reliability:

ParameterBA1070 ABIN101672 609-4303
Concentration1.0 mg/mL2.0 mg/mL2.0 mg/mL
ELISA Sensitivity1 ng/mL0.7 ng/mL1 ng/mL
Cross-ReactivityNoneNoneNone

Product Specs

Buffer
Preservative: 0.03% Proclin 300. Constituents: 50% Glycerol, 0.01M PBS, pH 7.4.
Description
**Rabbit anti-Human IgG Fc Antibody;HRP conjugated (CSB-PA00540F0Rb)** was produced in rabbits immunized with the human IgG Fc fragment. The Fc domain is common to all antibody molecules of the same class within a species. Therefore, this type of secondary antibody (Fc antibody) can bind to a wide range of primary antibodies.
This Rabbit anti-Human IgG Fc Antibody;HRP conjugated antibody has been validated for use in ELISA and Western blotting applications. The HRP-conjugated IgG was purified using caprylic acid ammonium sulfate precipitation.
Form
Liquid
Lead Time
Typically, we can ship products within 1-3 business days of receiving your order. Delivery time may vary depending on the purchasing method or location. Please consult your local distributor for specific delivery times.
Synonyms
fragment crystallizable region

Q&A

What is Rabbit anti-Human IgG Fc Antibody;HRP conjugated and how does it function in immunoassays?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated is a secondary antibody produced in rabbits that specifically recognizes and binds to the Fc portion of human IgG. This antibody is conjugated to horseradish peroxidase (HRP), an enzyme that catalyzes colorimetric, chemiluminescent, or fluorescent reactions when appropriate substrates are added. The conjugation allows for signal amplification in various immunoassay formats.

The antibody functions through specific recognition of the heavy chains on human IgG based on immunoelectrophoresis, without cross-reactivity to the light chains on human immunoglobulins or non-immunoglobulin human serum proteins . In immunoassays, this secondary antibody binds to the constant region (Fc) of primary human antibodies, enabling detection through the HRP enzyme activity. This system provides greater sensitivity through signal amplification as multiple secondary antibodies can bind to a single primary antibody .

What are the common applications for Rabbit anti-Human IgG Fc Antibody;HRP conjugated in research settings?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated finds applications in multiple immunological techniques:

  • Western Blotting: Typically used at dilutions of 1:1000 - 1:5000

  • ELISA: Recommended dilutions range from 1:5000 - 1:50000

  • Immunohistochemistry: Applied at dilutions of 1:500 - 1:2500

  • Immunoperoxidase electron microscopy

  • Other peroxidase-antibody based enzymatic assays requiring lot-to-lot consistency

The antibody is particularly valuable in research involving human antibody detection, human IgG subclass identification, and studies examining human immune responses where detection of the Fc region specifically (not the F(ab) region) is required .

What distinguishes Rabbit anti-Human IgG Fc Antibody;HRP conjugated from other secondary antibodies?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated is distinguished by several key characteristics:

  • Specificity: Targets only the Fc region of human IgG with no reaction observed against Human IgG F(ab)

  • Host species: Produced in rabbits, providing different binding properties compared to mouse or goat-derived alternatives

  • Preparation method: Typically prepared from monospecific antiserum by immunoaffinity chromatography using Human IgG coupled to agarose beads

  • Reactivity profile: When assayed by immunoelectrophoresis, results in a single precipitin arc against anti-Peroxidase, anti-Rabbit Serum, Human IgG, Human IgG F(c) and Human Serum

This antibody provides researchers with high specificity for human IgG Fc regions, making it particularly valuable in experimental designs where distinguishing between different regions of human antibodies is necessary.

What are the optimal storage conditions and reconstitution protocols for Rabbit anti-Human IgG Fc Antibody;HRP conjugated?

Proper storage and reconstitution are critical for maintaining antibody activity and performance:

Storage recommendations:

  • Store lyophilized material at 2-8°C prior to reconstitution

  • For long-term storage after reconstitution, dilute the antibody solution with glycerol to a final concentration of 50% glycerol and store as liquid at -20°C

  • Avoid repeated freeze-thaw cycles

  • Protect from light

Reconstitution protocol:

  • For lyophilized product, add the appropriate volume of sterile water as specified in the Certificate of Analysis (typically around 0.55 ml)

  • Allow complete dissolution before use

  • For glycerol addition: If reconstituted at 1 mg in 1.1 ml of sterile water, add 1.1 ml of glycerol for 50% final glycerol concentration

  • Centrifuge product if not completely clear after standing at room temperature

  • Prepare working dilutions immediately prior to use and discard unused portion

Important note: Never add sodium azide as a preservative, as it irreversibly inhibits HRP enzyme activity .

How should optimal dilutions be determined for different experimental applications?

The determination of optimal working dilutions for Rabbit anti-Human IgG Fc Antibody;HRP conjugated should be done experimentally for each specific application:

General recommended dilution ranges:

ApplicationRecommended Dilution RangeNotes
ELISA1:5,000 - 1:50,000 Start with 1:10,000 and adjust based on signal intensity
Western Blot1:1,000 - 1:5,000 Higher concentrations may increase background
Immunohistochemistry1:500 - 1:2,500 Optimization required for specific tissues

Titration approach:

  • Perform a series of 2-3 fold dilutions of the antibody

  • Test against a known positive control

  • Create a titration curve as demonstrated in the ELISA results where starting dilution was 5μg/ml with 3-fold dilutions

  • Define the IC50 (the antibody concentration giving 50% of maximum signal) as the titer

  • Select a working dilution that provides optimal signal-to-noise ratio for your specific application

The optimal working dilution ultimately depends on the detection method, substrate used, and sensitivity requirements of the particular experiment.

What blocking reagents and buffer systems are most effective when using this antibody?

The choice of blocking reagents and buffer systems significantly impacts the performance of Rabbit anti-Human IgG Fc Antibody;HRP conjugated:

Recommended blocking reagents:

  • 3-5% nonfat dry milk in TBST for Western blotting

  • 3% fish gelatin has been demonstrated effective for ELISA applications

  • 1-5% BSA (bovine serum albumin) in appropriate buffer

  • Commercial blocking reagents formulated for HRP-conjugated antibodies

Buffer systems:

  • PBS (Phosphate Buffered Saline), pH 7.4

  • TBS (Tris Buffered Saline)

  • The antibody is typically supplied in 10 mM Sodium Phosphate, 0.15 M Sodium Chloride, pH 7.2, with stabilizers

Important considerations:

  • Ensure blocking reagents do not contain interfering substances

  • When using the antibody for detecting human proteins in human samples, consider using species-specific blocking reagents to reduce background

  • 0.1% (v/v) of Kathon CG is sometimes used as preservative instead of sodium azide

  • TMB (3,3',5,5'-Tetramethylbenzidine) is commonly used as a substrate for HRP in ELISA applications

Experimental optimization is recommended as different applications and sample types may require adjustment of these parameters.

What is the specificity profile of Rabbit anti-Human IgG Fc Antibody;HRP conjugated and how is it validated?

The specificity of Rabbit anti-Human IgG Fc Antibody;HRP conjugated is critical for experimental reliability and is validated through multiple analytical methods:

Specificity profile:

  • Specifically targets the Fc region (two heavy chains with constant domains) of human IgG

  • No reactivity observed against Human IgG F(ab) fragments

  • No cross-reactivity with light chains on human immunoglobulins or non-immunoglobulin human serum proteins

Validation methods:

  • Immunoelectrophoresis: Results in a single precipitin arc against anti-Peroxidase, anti-Rabbit Serum, Human IgG, Human IgG F(c) and Human Serum

  • ELISA: Validated through titration against purified Human IgG F(c), showing high specificity and appropriate dose-response curve

  • Immunoaffinity purification: The antibody is typically prepared by immunoaffinity chromatography using Human IgG coupled to agarose beads, ensuring specific targeting

  • Western blot analysis: Demonstrated through specific detection of human IgG in various lysates

Validation data typically shows a clean single band at the expected molecular weight (approximately 50kDa) for the IgG heavy chain when used in Western blot applications .

How can cross-reactivity with other species' immunoglobulins be mitigated in experimental designs?

Managing potential cross-reactivity with other species' immunoglobulins requires careful experimental design:

Strategies to mitigate cross-reactivity:

  • Pre-absorption: Some commercial antibodies are specifically absorbed against solid phase normal bovine, mouse and rabbit serum proteins to minimize cross-reactivity

  • Blocking with heterologous serum: Include serum from the potentially cross-reactive species in blocking buffers

  • Dilution optimization: Determine the minimum antibody concentration that provides sufficient signal while minimizing cross-reactivity

  • Alternative antibody selection: Consider F(ab')2 fragments which may exhibit reduced cross-reactivity in certain applications

  • Negative control testing: Run parallel experiments with samples lacking human IgG to identify any non-specific binding

Important considerations:

  • When working with samples containing mixed species immunoglobulins (e.g., human antibodies produced in mouse hybridoma systems), use antibodies specifically verified not to react with the non-target species

  • For complex biological samples, consider additional purification steps prior to immunodetection

  • Validate the absence of cross-reactivity empirically for each new experimental system

How can Rabbit anti-Human IgG Fc Antibody;HRP conjugated be utilized in multiplex immunoassay systems?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated can be effectively integrated into multiplex immunoassay platforms:

Multiplex implementation strategies:

  • Combinatorial detection systems: HRP can be paired with other enzyme conjugates (alkaline phosphatase, beta-galactosidase) that utilize different substrates, enabling multiple target detection

  • Bead-based multiplexing: The antibody can be used in Luminex or similar bead-based platforms where the HRP signal is coordinated with bead identification

  • Microarray applications: For high-throughput screening of multiple human antibody specificities simultaneously

  • Sequential detection: Multiple rounds of probing, signal development, and stripping for iterative detection

Methodological considerations:

  • Ensure substrate selection provides appropriate signal separation when multiple HRP-conjugated antibodies are used

  • Consider differential dilution of antibodies to achieve comparable signal intensity across targets

  • Implement appropriate controls to evaluate potential cross-talk between detection systems

  • For quantitative applications, develop standard curves for each analyte in the multiplex system

The antibody has been successfully employed in experiments demonstrating binding between immobilized human TNF-alpha protein and human monoclonal anti-TNF-alpha antibody, with detection facilitated by HRP conjugated anti-human IgG Fc antibody at a 1:10000 dilution (0.0842μg/ml) .

What strategies can optimize signal-to-noise ratios when using Rabbit anti-Human IgG Fc Antibody;HRP conjugated in challenging samples?

Optimizing signal-to-noise ratios is essential when working with complex biological samples:

Signal enhancement approaches:

  • Amplification systems: Implement tyramide signal amplification (TSA) or other HRP-compatible amplification methods

  • Substrate selection: Choose high-sensitivity substrates like enhanced chemiluminescence (ECL) reagents

  • Incubation optimization: Extended substrate incubation times at controlled temperatures

  • Concentration optimization: Titrate both primary and secondary antibodies to find optimal working concentrations

Noise reduction strategies:

  • Extensive blocking: Use multi-component blocking systems (BSA plus normal serum)

  • Sample pre-treatment: Implement pre-absorption steps to remove interfering substances

  • Buffer optimization: Include detergents (0.05-0.1% Tween-20) and carrier proteins in wash buffers

  • Two-step detection: Biotinylated primary antibody followed by HRP-conjugated streptavidin can sometimes provide cleaner results than direct secondary antibody detection

Experimental validation:
In Western blot analysis, this antibody has demonstrated effective detection at dilutions ranging from 1:4000 to 1:32000 using ECL detection with 30-second exposure times, demonstrating high sensitivity with minimal background .

How can Rabbit anti-Human IgG Fc Antibody;HRP conjugated be employed in the characterization of therapeutic antibodies and recombinant proteins?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated plays a crucial role in therapeutic antibody development and characterization:

Applications in therapeutic antibody development:

  • Manufacturing quality control: Verification of human IgG Fc integrity in produced batches

  • Structural analysis: Confirmation of proper folding and accessibility of Fc regions

  • Functional assessment: Evaluation of Fc-mediated effector functions through binding assays

  • Post-translational modification analysis: Detection of glycosylation patterns on the Fc region

  • Stability studies: Monitoring potential degradation of Fc structures during storage

Implementation in recombinant protein characterization:

  • Fusion protein detection: For Fc-tagged recombinant proteins, enabling specific detection

  • Expression level quantification: Through calibrated ELISA systems using purified human IgG standards

  • Purification verification: Confirmation of successful purification of Fc-containing proteins

  • Binding kinetics assessment: In surface plasmon resonance or bio-layer interferometry where Fc-specific detection is required

Case example:
Research has demonstrated the application of this antibody type in characterizing human monoclonal anti-TNF-alpha antibodies. In one documented assay, immobilized Human TNF-alpha Protein (His Tag) at 2 μg/mL could bind Human Monoclonal Anti-TNF-alpha antibody (Human IgG1), with detection facilitated by HRP conjugated Anti-Human-IgG-Fc Antibody diluted at 1:10000 (0.0842 μg/ml) . This application showcases the utility of these antibodies in characterizing therapeutic antibody candidates.

What are common issues encountered when using Rabbit anti-Human IgG Fc Antibody;HRP conjugated and how can they be resolved?

Researchers may encounter several challenges when using this antibody:

Common issues and solutions:

IssuePossible CausesResolution Strategies
High backgroundInsufficient blocking, excessive antibody concentrationOptimize blocking conditions, increase blocking time, further dilute antibody
Weak or no signalInactive HRP, improper storage, excessive dilutionUse fresh antibody preparation, optimize dilution, ensure proper storage, avoid sodium azide
Non-specific bandsCross-reactivity, sample degradationIncrease antibody specificity through dilution, improve sample preparation, use freshly prepared samples
Variable resultsLot-to-lot variability, inconsistent handlingStandardize protocols, validate each new lot, maintain consistent experimental conditions
Rapid signal fadingImproper substrate handling, light exposurePrepare fresh substrate, protect from light, optimize image acquisition timing

Critical precautions:

  • Never add sodium azide as a preservative as it inhibits HRP irreversibly

  • Protect from light and avoid repeated freeze-thaw cycles to maintain enzyme activity

  • For long-term storage after reconstitution, dilute with glycerol to 50% final concentration and store at -20°C

  • Centrifuge the product if not completely clear after standing at room temperature

How do different detection substrates affect the performance of Rabbit anti-Human IgG Fc Antibody;HRP conjugated?

The choice of detection substrate significantly impacts sensitivity, dynamic range, and stability:

Substrate comparison:

Substrate TypeSensitivitySignal DurationApplicationsConsiderations
TMB (3,3',5,5'-Tetramethylbenzidine)Moderate-HighStable for minutes to hoursELISACan be stopped with acid for endpoint reading, blue to yellow color change
DAB (3,3'-Diaminobenzidine)ModeratePermanentIHC, blottingForms brown precipitate, not suitable for multiplexing
ECL (Enhanced Chemiluminescence)Very HighTransient (minutes)Western blotRequires specialized detection equipment, excellent for low abundance targets
ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid))ModerateStable for hoursELISAGreen color development, good for quantitative assays
AEC (3-amino-9-ethylcarbazole)ModerateSemi-permanentIHCRed precipitate, alcohol-soluble (aqueous mounting required)

Optimization guidance:

  • For highest sensitivity detection, ECL substrates with Rabbit anti-Human IgG Fc Antibody;HRP conjugated have demonstrated effective results with exposure times as short as 30 seconds

  • For ELISA applications, TMB substrate has been validated with this antibody type in titration experiments

  • Match substrate sensitivity to expected target abundance - use high-sensitivity substrates for low abundance targets

  • Consider signal stability requirements - some applications may require stable signal for extended imaging or documentation

What advancements in conjugation chemistry have improved the performance of Rabbit anti-Human IgG Fc Antibody;HRP conjugated products?

Recent advancements in conjugation chemistry have enhanced the performance characteristics of these antibodies:

Key technological improvements:

  • Site-specific conjugation: Rather than random lysine-based conjugation, site-specific attachment of HRP to the antibody maintains consistent orientation and preserves binding sites

  • Controlled conjugation ratios: Optimized enzyme-to-antibody ratios to maximize sensitivity without compromising specificity

  • Enhanced HRP stability: Modified HRP enzymes with improved resistance to inactivation and longer shelf-life

  • Polymer-based signal amplification: HRP polymers attached to each antibody molecule increase signal output per binding event

  • Bifunctional linker chemistry: Advanced linkers that maintain both antibody and enzyme activities while improving conjugate stability

Performance benefits:

  • Lower background through reduced non-specific binding

  • Improved lot-to-lot consistency through controlled conjugation processes

  • Extended shelf-life and stability under various storage conditions

  • Enhanced sensitivity allowing detection of lower target concentrations

  • Better signal-to-noise ratios in complex biological samples

Researchers should consider these advancements when selecting specific products for critical applications, particularly when high sensitivity or reproducibility is required.

How is Rabbit anti-Human IgG Fc Antibody;HRP conjugated utilized in immunological research involving transgenic animal models?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated serves as a critical reagent in studies involving transgenic animals expressing human immunoglobulins:

Applications in transgenic research:

  • Humanized antibody model validation: Verification of human IgG expression in transgenic rabbit models developed for therapeutic antibody production

  • B-cell compartment characterization: Analysis of human antibody-expressing B cells in transgenic models through flow cytometry and immunohistochemistry

  • Immune repertoire analysis: Assessment of human antibody repertoire development in transgenic animals

  • Differentiation of endogenous versus transgenic antibodies: Specific detection of human IgG Fc in the presence of host animal immunoglobulins

Relevant research findings:
Recent advances have produced transgenic rabbits incorporating human immunoglobulin genes that recapitulate the B-cell developmental pathway. These models also incorporate human CD79a/b and Bcl2 genes, which enhance B-cell receptor expression and B-cell survival . Following immunization against specific targets such as BMP9 (Bone Morphogenetic Protein 9), researchers have isolated highly affine and specific neutralizing antibodies from these rabbits .

The analysis of B-cell populations in these transgenic rabbits revealed that only ~0.1 to 0.7% of peripheral blood mononuclear cells (PBMCs) stained positive for rabbit IgM, confirming the knockout of endogenous rabbit IgM. The transgenic rabbits demonstrated ~8-18% B cells positive for human IgM, with distinct populations of B-cells displaying cell surface IgG . Rabbit anti-Human IgG Fc Antibody;HRP conjugated would be instrumental in specifically detecting and characterizing the human antibody-expressing cells in such models.

What are the considerations for using Rabbit anti-Human IgG Fc Antibody;HRP conjugated in diagnostic immunoassay development?

Development of diagnostic immunoassays utilizing Rabbit anti-Human IgG Fc Antibody;HRP conjugated involves several specialized considerations:

Assay development factors:

  • Standardization and calibration: Establishing consistent reference standards for quantitative assays

  • Sensitivity requirements: Determining minimum detection thresholds required for clinical relevance

  • Specificity validation: Comprehensive cross-reactivity testing against potential interfering substances

  • Sample matrix effects: Evaluation of performance in various clinical matrices (serum, plasma, other bodily fluids)

  • Stability testing: Assessment of reagent stability under various storage and handling conditions

Optimization approaches:

  • Blocking optimization to minimize background in clinical samples

  • Dilution protocol development to address high-concentration hook effects

  • Signal development kinetics characterization for optimal reading timepoints

  • Calibration curve modeling for accurate quantification

Performance specifications:
Rabbit anti-Human IgG Fc Antibody;HRP conjugated has demonstrated effectiveness in ELISA applications with recommended dilutions ranging from 1:5000-1:50000 , providing the sensitivity required for many diagnostic applications. The antibody's specific targeting of the Fc region without cross-reactivity to F(ab) fragments makes it particularly valuable for assays where specific detection of intact human IgG is required, as opposed to antibody fragments.

How can Rabbit anti-Human IgG Fc Antibody;HRP conjugated contribute to research on Fc receptor biology and function?

Rabbit anti-Human IgG Fc Antibody;HRP conjugated provides valuable tools for investigating Fc receptor interactions and functions:

Research applications in Fc receptor biology:

  • Binding competition assays: Evaluating whether the antibody competes with Fc receptors for binding to the Fc region

  • Structural studies: Investigating which Fc epitopes remain accessible after Fc receptor binding

  • Post-translational modification analysis: Assessing how glycosylation or other modifications affect Fc receptor interactions

  • Therapeutic antibody engineering: Screening modified Fc regions for altered receptor binding properties

  • Immune complex characterization: Detecting Fc exposure in various immune complex formations

Methodological approaches:

  • Sandwich ELISA systems where Fc receptors are used as capture molecules and Rabbit anti-Human IgG Fc Antibody;HRP conjugated as detection

  • Flow cytometry applications detecting cell-bound human IgG through Fc recognition

  • Immunoprecipitation of Fc receptor-antibody complexes with subsequent analysis

  • Competitive binding assays to map the relationship between antibody binding sites and Fc receptor contact points

Experimental design considerations:
When designing experiments to study Fc receptor biology, researchers should carefully evaluate whether the epitope recognized by the Rabbit anti-Human IgG Fc Antibody overlaps with Fc receptor binding sites, as this could potentially interfere with natural receptor-Fc interactions. Epitope mapping or competitive binding studies may be necessary to characterize these relationships for specific experimental systems.

How do Rabbit anti-Human IgG Fc Antibody;HRP conjugated products compare with alternatives derived from different host species?

Different host species produce anti-Human IgG Fc antibodies with distinct characteristics:

Comparison across host species:

Host SpeciesAdvantagesLimitationsOptimal Applications
RabbitHigh affinity and specificity, robust signal, good stabilityPotential cross-reactivity with rabbit primary antibodiesGeneral detection in most immunoassay formats
GoatLow background in many mammalian tissues, broad reactivityVariable lot-to-lot consistencyIHC applications, especially in rabbit tissues
MouseHighly consistent monoclonal options available, defined epitope recognitionMay cross-react in mouse tissue samplesApplications requiring epitope specificity
ChickenMinimal cross-reactivity with mammalian proteinsLess common, potentially more expensiveApplications with high risk of mammalian cross-reactivity

Performance differentiators:

  • Rabbit-derived antibodies often demonstrate superior affinity compared to other species

  • Goat anti-Human IgG Fc antibodies may offer reduced background in certain tissue types

  • Mouse monoclonal anti-Human IgG Fc antibodies provide consistent lot-to-lot reproducibility and defined epitope targeting

  • The hybridoma-derived mouse monoclonal antibody (clone 6F11C8) offers highly specific recognition of human IgG Fc with minimal cross-reactivity

Selection guidance:
Choose host species based on experimental design, considering:

  • Sample tissue origin (avoid same species as sample)

  • Primary antibody species (avoid same species as primary)

  • Required specificity (monoclonal vs. polyclonal)

  • Application sensitivity requirements

What are the advantages and limitations of using F(ab')2 fragments versus whole IgG in anti-Human IgG Fc secondary antibodies?

The choice between F(ab')2 fragments and whole IgG formats involves important trade-offs:

F(ab')2 fragment advantages:

  • Reduced non-specific binding through elimination of the Fc region

  • Minimized cross-reactivity with Fc receptors present in samples

  • Smaller size allowing better tissue penetration in IHC applications

  • Reduced background in samples containing rheumatoid factor or other anti-Fc antibodies

  • Advantageous when detecting antibodies in the presence of Fc receptors

Whole IgG advantages:

  • Generally higher stability and longer shelf-life

  • Typically more economical to produce

  • Higher avidity through bivalent binding plus potential Fc interactions

  • May provide stronger signal in certain applications

  • Better retention during stringent washing steps

Application-specific considerations:

  • For samples from patients with autoimmune conditions, F(ab')2 fragments may reduce interference from rheumatoid factors

  • In flow cytometry applications, F(ab')2 fragments may reduce non-specific binding to Fc receptors on immune cells

  • For standard ELISA and Western blot applications, whole IgG formats often provide sufficient specificity with stronger signal

  • Some commercial products, like Goat anti-Human IgG Fc, F(ab)'2 fragment, HRP conjugated, are specifically designed to minimize cross-reactivity with bovine, mouse, and rabbit serum proteins

How do direct detection methods compare with amplified detection systems for applications requiring Rabbit anti-Human IgG Fc Antibody;HRP conjugated?

Various detection strategies offer different performance characteristics:

Detection method comparison:

Detection MethodSensitivitySignal StabilityComplexityBest Applications
Direct HRP detectionModerateStable (substrate dependent)LowRoutine Western blots, standard ELISA
Biotin-streptavidin amplificationHighStableModerateLow abundance targets, difficult samples
Tyramide signal amplification (TSA)Very highPermanentHighExtremely low abundance targets, IHC
Polymer-HRP systemsHighStableLow-moderateIHC, sensitive Western blots
Quantum dot conjugationHighVery stableModerateMultiplexing, long-term imaging

Performance comparisons:

  • Sensitivity thresholds: TSA systems can provide 10-100x signal amplification compared to direct HRP detection

  • Signal-to-noise considerations: Amplification systems may increase both signal and background proportionally

  • Protocol complexity: Direct detection offers simplest workflows, while TSA requires multiple additional steps

  • Cost implications: Direct HRP detection is typically most economical; amplification systems increase reagent costs

Implementation guidance:

  • For routine detection of abundant targets, direct HRP detection using Rabbit anti-Human IgG Fc Antibody;HRP conjugated at recommended dilutions (1:1000-1:5000 for Western blots, 1:5000-1:10000 for ELISA) provides sufficient sensitivity

  • For challenging samples or low abundance targets, consider biotin-streptavidin systems or polymer-HRP approaches

  • When extreme sensitivity is required, implement TSA systems with optimized Rabbit anti-Human IgG Fc Antibody;HRP conjugated as the initial detection antibody

What emerging research areas are increasingly utilizing Rabbit anti-Human IgG Fc Antibody;HRP conjugated?

Several cutting-edge research fields are driving new applications for these antibodies:

Emerging application areas:

  • Single-cell antibody secretion assays: Detecting antibody production at the individual cell level

  • Microfluidic immunoassay platforms: Integration into lab-on-chip devices for point-of-care diagnostics

  • Bispecific antibody characterization: Analyzing novel therapeutic antibody formats with engineered Fc regions

  • Nanobody and alternative scaffold detection: When these constructs incorporate human Fc regions

  • CAR-T cell therapy monitoring: Detecting soluble targets bound by engineered receptors containing Fc regions

  • Tissue-resident antibody research: Localizing human antibodies in tissue microenvironments

Technological innovations enabling new applications:

  • Advances in microscale detection systems allowing single-molecule sensitivity

  • Integration with automated high-throughput screening platforms

  • Combination with digital PCR and other molecular methods for correlative analysis

  • Development of rabbit models with humanized antibody repertoires for therapeutic antibody discovery

These emerging applications continue to expand the utility of Rabbit anti-Human IgG Fc Antibody;HRP conjugated beyond traditional immunoassays into new frontiers of biomedical research.

What methodological advances are expected to enhance the utility of Rabbit anti-Human IgG Fc Antibody;HRP conjugated in future research?

Ongoing technological developments promise to further expand applications:

Anticipated methodological innovations:

  • Multimodal detection: Dual-labeled antibodies combining HRP with fluorescent or other detection modalities

  • Enhanced enzyme variants: Engineered HRP variants with improved stability, catalytic efficiency, or substrate specificity

  • Machine learning integration: Automated image analysis tools for quantitative interpretation of complex staining patterns

  • Microfluidic integration: Incorporation into automated, miniaturized immunoassay platforms

  • Novel immobilization strategies: Surface chemistry innovations for improved antibody orientation and accessibility

  • Improved recombinant production: Transition from traditional immunization to recombinant production for enhanced consistency

Future opportunities:

  • Integration with synthetic biology approaches for custom antibody engineering

  • Combination with CRISPR-modified cellular systems for functional genomics

  • Implementation in point-of-care and resource-limited diagnostic platforms

  • Development of activity-based rather than abundance-based detection systems

These advances will continue to expand the versatility and utility of Rabbit anti-Human IgG Fc Antibody;HRP conjugated in both basic research and applied biomedical sciences.

What quality control considerations are most critical for ensuring reproducible results with Rabbit anti-Human IgG Fc Antibody;HRP conjugated across research applications?

Ensuring reproducible results requires attention to several key quality control parameters:

Critical quality control metrics:

  • Specificity validation: Comprehensive cross-reactivity testing against non-target immunoglobulins and serum proteins

  • Sensitivity assessment: Limit of detection determination under standardized conditions

  • Lot-to-lot consistency: Comparison testing between manufacturing lots

  • Enzyme activity stability: Monitoring HRP activity retention over time and under various storage conditions

  • Functional validation: Application-specific performance testing rather than just binding assays

Best practices for reproducibility:

  • Maintain detailed records of antibody lot numbers, dilutions, and performance characteristics

  • Include consistent positive and negative controls in each experiment

  • Establish internal reference standards for quantitative applications

  • Validate each new lot before implementing in established protocols

  • Store antibody aliquots rather than repeatedly accessing stock solutions

Documentation recommendations:

  • Record reconstitution dates and conditions

  • Document storage temperature and handling procedures

  • Maintain calibration curves for quantitative applications

  • Archive representative results from each antibody lot for comparison

  • Implement standardized reporting formats to facilitate cross-experimental comparison

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