FITC Conjugated Protein G

Overview

FITC Conjugated Protein G is an affinity reagent used to bind or detect antibody- and biotin-based reagents in common immunoassays.

Key elements and design rationale

• Recognition: Designed to recognize immunoglobulins from Protein G for secondary detection.
• Conjugate/label: FITC provides a defined detection chemistry (e.g., fluorophore, enzyme, or biotin–streptavidin systems).
• Format: Concentrated, Liquid.
• Contents (provided): 0.5 mg of FITC conjugated protein G, F/P=3/1; 0.01M PBS; 0.01% Thimerosal, 50% glycerol..

FITC Conjugated Protein G

Biological background

Secondary antibodies enable indirect detection by binding to the constant regions of primary antibodies. Fragment specificity matters: reagents labeled as (H+L) recognize epitopes on both heavy and light chains of the target-species immunoglobulin, while Fc- or light-chain-specific secondaries can reduce off-target signal in some multiplex or isotype-specific designs. Label choice (fluorophore, enzyme, biotin) affects sensitivity, multiplex compatibility, and how signal should be interpreted across sample types.

Research relevance and current trends

• Multiplex imaging and spatial biology workflows increasingly rely on well-matched secondary antibodies to minimize cross-reactivity between species and isotypes.
• Biotin–streptavidin amplification remains common for tissue staining and low-abundance targets, with controls used to monitor endogenous biotin background where relevant.
• Quantitative immunoassays often combine consistent secondary reagents with standardized detection chemistries to support cross-experiment comparability.

Common research applications

• Immunofluorescence/ICC: enables cellular localization and colocalization studies with multi-channel detection when spectra are compatible.

Notes for experimental interpretation

• Cross-reactivity and background: non-target binding can arise from endogenous immunoglobulins, closely related species, or multiplexed primary antibodies. Species selection and cross-adsorption (when specified) help reduce unwanted signal.
• Control concepts: no-primary controls, isotype controls, and orthogonal detection channels help distinguish specific staining from background. For biotin-based systems, consider controls for endogenous biotin where relevant.

Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.