Triple Loading Dye Buffer (6x): Precise Sample Tracking and Visualisation
The Triple Loading Dye Buffer (6x) is a high-quality, non-denaturing solution specifically formulated for the preparation of nucleic acid samples for agarose and native polyacrylamide gel electrophoresis. In the laboratory, monitoring the migration progress of DNA or RNA is critical to prevent samples from running off the gel. This buffer provides an expert solution by increasing the density of the sample to ensure it sinks evenly into the well, while providing multiple visual markers to track electrophoretic progress in real-time.
The technical efficacy of this buffer lies in its unique triple-dye formulation, containing Xylene Cyanol, Bromophenol Blue, and Orange G. These three tracking dyes migrate at distinct rates, corresponding to different fragment sizes, allowing researchers to monitor migration across a broad range of molecular weights. The buffer is composed of 50% (w/v) sucrose and 40mM Tris base in ultra-pure, distilled, deionised water, providing the necessary weight for effortless sample loading without interfering with the electrical field or the integrity of the nucleic acids.
Key Benefits:
- Multi-Range Monitoring: Three distinct tracking dyes. The inclusion of Xylene Cyanol, Bromophenol Blue, and Orange G provides clear visual reference points for large, medium, and small fragments.
- Effortless Sample Loading: Optimised density. The 50% sucrose concentration ensures that samples settle rapidly and uniformly at the bottom of the wells, preventing cross-well contamination.
- Preserved Sample Integrity: Non-denaturing formulation. Designed for native applications, the buffer maintains the natural state of your samples, making it ideal for both routine analysis and sensitive downstream applications.
- Economical 6x Concentrate: Maximise sample volume. The concentrated format allows for minimal dilution of your precious DNA or RNA samples during preparation.
- Universal Compatibility: Versatile application. Suitable for use in all standard agarose and native PAGE electrophoresis systems using TBE or TAE buffers.
Technical Insights
Migration Reference Guide
When used in standard 0.5%–1.5% agarose gels, the tracking dyes provide the following approximate migration points:
| Tracking Dye | Approximate Migration (bp) |
|---|---|
| Xylene Cyanol | ~4000 bp |
| Bromophenol Blue | ~300 – 500 bp |
| Orange G | ~50 bp |
Specifications
- Concentration: 6x
- Composition: 50% (w/v) Sucrose, 40mM Tris Base
- Tracking Dyes: Xylene Cyanol FF, Bromophenol Blue, Orange G
- Application: Agarose and Native PAGE Gel Electrophoresis
- Storage: Room Temperature or 4°C for long-term stability