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Goat Anti-Rabbit Secondary Antibodies
Goat anti-rabbit secondary antibodies are essential reagents for detecting rabbit primary antibodies in immunoassays. AAT Bioquest offers a comprehensive selection of goat anti-rabbit IgG conjugates featuring iFluor® fluorescent dyes, trFluor™ time-resolved labels, enzyme conjugates, and Power Styramide™ Signal Amplification (PSA) kits. These reagents are optimized for applications including immunofluorescence microscopy, flow cytometry, Western blotting, ELISA, and immunohistochemistry, with options for both standard and cross-adsorbed formats to minimize background in multi-species experiments.
Detection Method | Product Types | Best For | Key Advantage |
|---|---|---|---|
Direct fluorescence | iFluor®, trFluor™ conjugates | Flow cytometry, IF microscopy, multiplexing | Simple protocol, wide spectral range |
Enzymatic amplification | HRP, ALP conjugates | ELISA, Western blot, IHC | Signal amplification, versatile substrates |
Biotin-streptavidin systems | Biotinylated conjugates | Signal amplification, flexible detection | Compatible with any streptavidin conjugate |
Power Styramide™ Signal Amplification | PSA imaging kits | Low-abundance targets, IHC | 10-100× signal enhancement |
Direct Fluorescence Detection
Direct fluorescence detection uses fluorophore-conjugated secondary antibodies for immediate visualization without additional amplification steps. AAT Bioquest offers iFluor® dyes spanning the full visible spectrum for standard fluorescence applications, as well as trFluor™ lanthanide conjugates for time-resolved fluorescence detection that eliminates autofluorescence interference.
iFluor® Dye Conjugates
iFluor® dyes represent AAT Bioquest's next-generation fluorophores, offering superior brightness and photostability compared to traditional dyes. Goat anti-rabbit IgG antibodies conjugated to iFluor® dyes are ideal for demanding applications requiring maximum signal intensity. Available in standard, cross-adsorbed, and highly cross-adsorbed formats.
Key Features
- Superior brightness – Up to 2× brighter than comparable Alexa Fluor® dyes
- Enhanced photostability – Extended imaging without significant signal loss
- Full spectral coverage – Options from UV to near-infrared
- Cross-adsorbed options – Standard, cross-adsorbed, and highly cross-adsorbed formats available
- Optimized F/P ratios – Consistent lot-to-lot performance
XFD (Alexa Fluor® Replacement) Conjugates
XFD dyes are spectrally equivalent to Alexa Fluor® dyes, providing a cost-effective alternative with identical excitation/emission profiles.
mFluor™ Dye Conjugates
mFluor™ dyes are optimized for flow cytometry applications, providing bright signals with minimal spectral overlap. The absorbance maxima of mFluor™ dyes are designed to be optimally excited by one of the major laser lines commonly equipped in flow cytometers, such as the 350 nm, 405 nm, 488 nm, 532 nm, 561-568 nm, or 633-647 nm laser lines. This enables more choices and flexibility for multicolor panel design.
trFluor™ Time-Resolved Fluorescent Conjugates
trFluor™ Tb conjugates utilize terbium-based lanthanide labels for time-resolved fluorescence detection, eliminating background autofluorescence that can interfere with conventional fluorophores. The long fluorescence lifetime of terbium complexes (milliseconds vs. nanoseconds) enables gated detection that dramatically improves signal-to-noise ratios, making these conjugates ideal for TR-FRET assays and high-throughput screening applications.
Key Features
- Eliminates autofluorescence – Time-gated detection removes short-lived background signals
- Large Stokes shift – Large separation between excitation (333 nm) and emission (544 nm) wavelengths
- TR-FRET compatible – Excellent energy donor for time-resolved FRET-based assays
- High-throughput compatible – Superior performance in plate-based screening assays
Phycobiliprotein Conjugates (PE, APC, PerCP, and Tandems)
Phycobiliprotein-conjugated secondary antibodies (PE, APC, PerCP, and tandem dyes) offer exceptional brightness for flow cytometry applications.
Classic Dye Conjugates
Classic fluorescent dye conjugates including FITC, Cy dyes, and Texas Red remain essential tools for routine immunofluorescence and flow cytometry applications.
Enzymatic Amplification (HRP and ALP Conjugates)
Enzyme-conjugated secondary antibodies enable signal amplification through enzymatic substrate conversion. HRP (horseradish peroxidase) and ALP (alkaline phosphatase) conjugates are essential for colorimetric, fluorescent, and chemiluminescent detection in ELISA, Western blot, and immunohistochemistry applications.
Key Features
- Signal amplification – Enzymatic turnover generates intense detectable signal
- Versatile detection – Compatible with colorimetric, fluorescent, and chemiluminescent substrates
- ELISA optimized – Validated for quantitative immunoassays
- IHC/ICC compatible – Suitable for tissue and cell staining applications
Biotin-Streptavidin Systems
Biotinylated secondary antibodies leverage the high-affinity biotin-streptavidin interaction for flexible, amplifiable detection. These conjugates can be paired with any streptavidin-conjugated reporter for customized detection workflows.
Key Features
- Flexible detection – Compatible with any streptavidin conjugate
- Signal amplification – Multiple biotin molecules per antibody enhance sensitivity
- Multiplexing compatible – Supports flexible and amplifiable detection strategies
- Universal platform – Works across ELISA, IHC, IF, and flow cytometry
Power Styramide™ Signal Amplification (PSA)—Next-Generation TSA
Power Styramide™ Signal Amplification (PSA) delivers up to 50x greater sensitivity than traditional tyramide signal amplification (TSA), enabling detection of low-abundance targets that conventional immunofluorescence methods often miss. PSA combines two key innovations: Styramide™ substrates with significantly higher reactivity than tyramide, and iFluor® dyes with exceptional brightness and photostability. The result is dramatically enhanced fluorescent signals that remain stable through extended imaging sessions, stringent washes, and multiplex protocols.
Key Features
- Broad application compatibility: Optimized for IHC (including FFPE tissues), ICC, and in situ hybridization (ISH)
- Multiplex-ready: Sequential staining with spectrally distinct PSA kits enables multi-target detection, even with same-species primary antibodies
- Complete kit format: Each kit includes HRP-conjugated goat anti-rabbit IgG secondary antibody and iFluor®-labeled Styramide™ reagent for ~100 tests
- Drop-in workflow: Uses the same HRP conjugates, buffers, and protocol steps as traditional TSA
Why PSA Outperforms Traditional TSA
Feature | PSA (Power Styramide™) | Traditional TSA |
|---|---|---|
Sensitivity | Up to 50x greater signal | Baseline |
Substrate reactivity | Styramide™ radicals—faster, more efficient covalent deposition | Tyramide radicals |
Fluorophore performance | iFluor® dyes—superior brightness, photostability, and thermal resistance | Alexa Fluor or equivalent |
Primary antibody usage | 10-50x lower concentrations | Standard concentrations |
Protocol compatibility | Drop-in replacement—same HRP conjugates, buffers, and workflow | — |
This document (01.0287.251203r1) was last updated on Thu Feb 12 2026. All trademarks and registered trademarks mentioned herein are the property of their respective owners.
Goat Anti-Rabbit Secondary Antibodies