Universal Blocking Buffer
Cat No.: DCP-UTBS1X
Size: 500 mL & 1 L
World’s cleanest buffer for all cell and molecular biology experiments
* This blocking solution is included in all DiagnoCine Precision ELISA kits in 50mL volume.
Description
The Universal Blocking Buffer is a highly advanced, multi-component ready-to-use blocking solution designed for superior performance in immunoassays including ELISA, Western blotting, immunohistochemistry, and other immunodetection applications. This formulation combines protein-based, polymer-based, and surfactant systems to provide comprehensive blocking capabilities against all types of non-specific binding interactions to achieve maximum sensitivity while minimizing background interference across diverse experimental conditions.
Technical Specifications
The foundation utilizes Tris-buffered saline (TBS) as the optimal buffering platform. TBS provides exceptional pH stability and ionic strength maintenance while offering superior compatibility with phosphoprotein detection systems compared to phosphate-based alternatives. The buffering system maintains physiological conditions essential for optimal antigen-antibody interactions while supporting both alkaline phosphatase and horseradish peroxidase detection systems. * If customization is needed for PBS-based, please contact us.
Multi-Protein Blocking Architecture
The blocking system employs a synergistic three-protein approach optimized for comprehensive surface coverage and minimal cross-reactivity. Sodium caseinate serves as the primary small-protein blocker, providing over 90% non-specific binding inhibition through effective protein-plastic surface interactions. BSA (Fraction V, biotin-free, IgG-free) functions as the large-protein component, offering high-sensitivity detection capabilities while maintaining compatibility with all antibody systems. Fish gelatin completes the protein matrix as a gap-filling agent that remains fluid at low temperatures and eliminates mammalian protein cross-reactivity concerns.
Advanced Polymer Enhancement System
The formulation incorporates pharmaceutical-grade polymers to address hydrophobic and electrostatic binding. PVP-40 provides a hydrophobic surface blocking through its biocompatible, pH-stable polymer structure while enhancing protein stabilization. Dextran sulfate functions as an ionic and electrostatic interference blocker, effectively preventing the interactions of charged molecules that contribute to the background signal.
Optimized Surfactant Technology
The dual-surfactant system ensures complete surface wetting and prevents hydrophobic binding. Tween-20 at optimized concentrations provides effective reduction of non-specific binding while maintaining antibody specificity. Triton X-100 enhances surface wetting properties and improves washing efficiency during immunoassay procedures.
Comprehensive Stabilization and Preservation
The buffer includes advanced stabilization components to ensure extended shelf life and maintain performance. ProClin 300 offers broad-spectrum antimicrobial protection, making it suitable for in vitro diagnostic applications. Glycerol enhances protein stabilization while providing viscosity control, thereby improving handling characteristics. EDTA chelation prevents metal ion interference that can affect antibody-antigen interactions.
Universal Application Performance
This blocking system delivers exceptional versatility across immunoassay platforms. For ELISA applications, the buffer provides rapid blocking with superior signal-to-noise ratios while supporting both direct and sandwich assay formats. In Western blotting, the formulation offers compatibility with colorimetric, chemiluminescent, and fluorescent detection methods while supporting both nitrocellulose and PVDF membranes. For multiplexed immunoassays, the buffer maintains consistent performance across multiple analytes while minimizing cross-reactivity and assay variability.
Key Performance Characteristics
- Universal compatibility with all immunoassay formats and detection systems
- Superior blocking efficiency through a multi-mechanism approach
- Enhanced sensitivity while maintaining low background signals
- Optimal pH and ionic strength for antigen-antibody interactions
- Extended stability with a comprehensive preservation system
- Ready-to-use formulation requiring no dilution or preparation
- Compatible with automated platforms and high-throughput applications
The TBS Multi-Protein Blocking System represents the next generation of immunoassay blocking technology, delivering consistent and reliable performance across the full spectrum of research and diagnostic applications while maintaining the highest standards of sensitivity and specificity.
* This blocking buffer is included in DiagnoCine Precision ELISA Kits. The end user has the option to use the in-house blocking buffer, a general blocking solution included, or use the 50mL Universal Blocking Buffer.
Universal Blocking Buffer for ELISA Applications
Blocking Procedure:
- After coating and washing steps, add 300μL blocking buffer per well
- Incubate 1-2 hours at room temperature (22-25°C) or overnight
- Aspirate blocking buffer
- Proceed with antibody incubation or dry plates for storage
Western Blotting Applications
- Transfer proteins to membrane as per standard protocol
- Block membrane with sufficient buffer to cover completely (10 mL for mini, 20 mL for midi blots)
- Incubate 5-60 minutes at room temperature with gentle agitation
- Use blocking buffer as antibody diluent for primary and secondary antibodies
Immunohistochemistry Applications
- Apply blocking buffer directly to tissue sections
- Incubate 30-60 minutes at room temperature
- Remove excess buffer and proceed with primary antibody incubation
Quality Control
- Apperance: Colorless, liquid solution.
- pH (at 1X concentration): 7.4 - 7.6
- Sterility: Nonsterile
Storage Requirements
Light Protection: Protect from direct sunlight
Unopened Product: 24 months from date of manufacture when stored at -20 °C
Opened Product: 6 months at 4°C
* This product is manufactured under ISO 13485-certified and CE-approved facilities (Suppliers of DiagnoCine Precision). All final packaging, quality assurance, and testing are done at the DiagnoCine R&D and Quality Testing Center. All specific customization requests and assembly were accomplished at DiagnoCine Precision in Totowa, New Jersey, USA
