WB blocking buffer kit, TrueBlack®

Supplier: Biotium
23013-TEA 112 EUR
23013-T 23013.
WB blocking buffer kit, TrueBlack®
Buffers Electrophoresis Buffers Blocking Buffers
The TrueBlack® WB blocking buffer kit is a ready-to-use buffer system that provides optimal specificity, sensitivity, and background signal suppression for fluorescence-based western blotting (WB).

  • Blocks non-specific protein binding, reducing background fluorescence over the entire membrane
  • Suppresses background caused by charged fluorescent dyes (performs better than BSA, gelatin, or casein)
  • Reduces antibody cross-reactivity, eliminating non-specific bands
  • Compatible with both polyvinylidene difluoride (PVDF) and nitrocellulose membranes
  • Can be used with antibodies labeled with all types of fluorophores spanning the visible and NIR spectrum
  • Contains non-mammalian blocking agents, for broad secondary antibody compatibility
  • TBS based buffer suitable for phosphoprotein detection

The buffers are designed to achieve optimal specificity and sensitivity by blocking background from the non-specific interaction between the fluorophore-labeled antibodies and the membrane. Non-specific signal in WB can arise from multiple sources, including antibody cross-reactivity with off-target proteins, non-specific antibody adsorption to the membrane, and membrane autofluorescence. Another potential cause of background that is not well-known is the effect of fluorescent dyes themselves on the specificity of labeled antibodies.

Next-generation fluorescent dyes like Alexa Fluor® or CF® dyes often carry multiple negative charges to improve dye solubility and brightness of conjugates. The extra charge carried by the dye can result in non-specific antibody binding and background fluorescence. The TrueBlack® WB Blocking Buffer Kit blocks background from multiple sources including charged dye conjugates. It is especially advantageous for phosphoprotein detection, significantly improving specificity compared to conventional blocking buffers.
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