Chemiluminescence is the western blot detection method of choice in most protein laboratories, as it provides the greatest sensitivity and convenience for detection with film or digital imaging equipment.
Chemiluminescent substrates for horseradish peroxidase (HRP) are two-component systems consisting of a stable peroxide solution and an enhanced luminol solution. To make a working solution, the equal volumes of the two components are mixed together. When incubated with a blot on which HRP-conjugated antibodies (or other probes) are bound, a chemical reaction produces light that can be detected by film or sensitive camera (Figure 1).
ABP Biosciences offers two types of super sensitive chemiluminescent substrates for Western blot detection with horseradish peroxidase enzyme (HRP). The signal from ECL substrates can be captured and documented using X-ray film or a capable CCD camera imager.
Figure1. The principle of WB detection.
ECL Western Blot Reagent Selection Guide
|Immobilon™ Western (Millipore)||Super ECL||Super ECL Ultra|
|Sensitivity||picogram||low picogram to high femtogram||femtogram|
|Signal duration||<2 h||<8 h||<4 h|
|Primary Ab dilution||1:1,000-1:20,000||1:1,000-1:30,000||1:5,000-1:30,000|
|Secondary Ab dilution||1:20,000-1:200,000||1:50,000-1:200,000||1:100,000-1:300,000|
|Stability||1 year at 4℃||1 year at 4℃||1 year at 4℃|
The comparsion of sensitivity of Super ECL, Super ECL Ultra, and Millipore Immobilon™ Western blot substrate.
The comparsion on exposure time.
The comparsion on signal duration.
The comparsion on antibody dilution.
- Nucleic Acid Gel Stains
- Nucleic Acid Quantitation
- Labeled Nucleotides
- Protein Detection and Quantitation
- Cell Structure Probes
- Secondary Antibody and Streptavidin
- Cell Proliferation & Viability Assay
- Cell Apoptosis Assay
- Andy Fluor™ Dyes
- Ion Indicators
- Transfection Reagent
- Luciferase Assay Kit
- ECL Western Blot Reagent