Description
Product Overview
The ProbeSeq Claudin-1 FRAPProbe™ System provides fluorescence-labeled probes for quantitative measurement of Claudin-1 dynamics within tight junction complexes of epithelial tissues. The system enables characterization of junction assembly, barrier permeability regulation, protein diffusion, and epithelial transport behavior.
This product supports barrier function studies, inflammatory disease research, gut microbiome models, drug transport analysis, and tissue engineering applications. Probe design ensures strong photostability, controlled photobleaching behavior, and reliable fluorescence recovery for quantitative FRAP measurements.
The system is compatible with confocal microscopy, live-cell imaging platforms, microfluidic epithelial models, and organ-on-chip barrier systems.
FRAP Technology Advantages
FRAP enables real-time measurement of tight junction protein mobility and epithelial barrier stability within living systems. Unlike endpoint permeability assays, FRAP provides spatially resolved analysis of junction remodeling and protein transport behavior. This approach supports mechanistic studies of barrier dysfunction, inflammation-induced permeability changes, and tissue integrity.
Molecular Detection Mechanism
Fluorescent Claudin-1 probes selectively bind tight junction proteins localized at cell–cell interfaces. A defined region is photobleached using a focused laser pulse, followed by monitoring fluorescence recovery as unbleached molecules diffuse into the region.
Recovery kinetics provide quantitative measurements of junction protein diffusion coefficients, mobile fraction, and barrier stability. The system supports analysis of epithelial permeability changes and junction reorganization.
Target Design Strategy
Probe design targets extracellular Claudin-1 domains while preserving native tight junction function.
Design optimization prioritizes:
High binding specificity to Claudin-1
Minimal non-specific membrane interaction
Strong photostability under repeated imaging
Controlled photobleaching kinetics
Compatibility with live epithelial models
Stable fluorescence recovery performance
Antibody-, ligand-, or nanobody-based probe formats available.
Assay Workflow Integration
The FRAPProbe™ system supports workflows including live-cell labeling, fluorescence imaging, targeted photobleaching, and quantitative recovery analysis.
The assay integrates with:
Confocal microscopy systems
High-content imaging platforms
Microfluidic epithelial barrier models
Organ-on-chip systems
Drug permeability studies
Quantitative image analysis software
System Components
Fluorescent Claudin-1-binding probes
Recommended imaging and photobleaching parameters
Control reagents for calibration
Buffer and labeling guidelines
Data analysis recommendations
Custom probe formats available upon request.
Platform Compatibility
Confocal microscopy systems
Live-cell imaging platforms
High-content screening instruments
Microfluidic cell culture systems
Organ-on-chip devices
Barrier function research workflows
Performance Characteristics
High fluorescence signal intensity, strong photostability, reproducible photobleaching response, rapid recovery measurement capability, low background binding, and quantitative tight junction diffusion analysis.
Technical Specifications
Detection target: Claudin-1 tight junction protein
Probe format: Fluorescent antibody / ligand / nanobody conjugate
Fluorophore options: GFP-compatible, Alexa Fluor, Cy dyes
Imaging compatibility: confocal FRAP systems
Working concentration: assay dependent
Storage: 4 °C or –20 °C depending on probe format
Quality Assurance
Binding specificity validation, fluorescence characterization, photostability testing, functional activity verification, and manufacturing quality review performed for each batch.
Research Applications
Epithelial barrier integrity studies
Gut and lung tissue models
Inflammation and permeability research
Drug transport and absorption studies
Organ-on-chip validation
Host–microbiome interaction research
Storage and Handling
Store under recommended temperature conditions protected from light. Avoid repeated freeze–thaw cycles. Use sterile handling for live-cell applications.
