Methylene Blue II Phosphoramidite - (10-5961)
3-Butyl-3-[2-(2-cyanoethyl)(N,N-diisopropyl)phosphoramidityl)ethyl]amino-7-(2-(4,4'-dimethoxytrityloxy)ethyl)-7-(butylamino)phenothiazin-5-ium chloride
3-Butyl-3-[2-(2-cyanoethyl)(N,N-diisopropyl)phosphoramidityl)ethyl]amino-7-(2-(4,4'-dimethoxytrityloxy)ethyl)-7-(butylamino)phenothiazin-5-ium chloride
Methylene Blue, which belongs to the phenothiazine family of dyes, is a unique dye with a variety of useful properties. Despite its high extinction coefficient in the visible region (81,000 L/mol.cm), it is weakly fluorescent due to its high rate of intersystem crossing from the S1 excited state to the T1 triplet state. This property makes it an excellent photosensitizer, and it has been used extensively to produce highly reactive singlet oxygen. Methylene blue has the ability to both intercalate in duplex DNA, preferring G:C over T:A base pairs, and can act as an electrochemical redox probe. Methylene blue has also been shown to be unmatched in performance as a redox-active reporter for electrochemical biosensors.
Earlier, we introduced Methylene Blue C3 Phosphoramidite but this product proved to have quite limited stability and has been discontinued. As an alternative option, we introduced Methylene Blue NHS Ester to allow researchers to label amino-modified oligonucleotides with this interesting dye. With the encouragement and technical expertise of Carole Chaix and her colleagues at the University of Lyon, we decided to prepare an alternative structure that seemed to have a much superior stability profile - Methylene Blue II Phosphoramidite. Fortunately, this structure did indeed prove more stable and we are now able to offer again a Methylene Blue Phosphoramidite.
Usage
- Coupling: 3 minute coupling time recommended. The use of UltraMILD monomers are required. (Catalog Numbers: dA: 10-1601-xx, dC: 10-1015-xx, dG: 10-1621-xx, dT: 10-1030-xx). To avoid any exchange of the iPr-Pac group on the dG with acetyl, use the UltraMild Cap Mix A (40-4210-xx/ 40-4212-xx). Some branching off the Methylene Blue will occur when incorporated internally within an oligo, so we recommend the dye be placed at or near the 5' terminus of the oligo sequence.
- Deprotection: UltraMILD 0.05M potassium carbonate in methanol (60-4600-30) for 4 hours at room temperature
| Specifications | |
|---|---|
| Diluent | Anhydrous Acetonitrile |
| Recommended Storage | Freezer storage, -10 to -30°C, dry |
| Stability In Solution | 1-2 Days |
The table below show pack size data and, for solutions, dilution and approximate coupling based on normal priming procedures.
ABI 392/394
| Catalog # | Pack Size | Grams/Pack | 0.1M Dil. (mL) | Approximate Number of Additions | |||||
|---|---|---|---|---|---|---|---|---|---|
| LV40 | LV200 | 40nm | 0.2μm | 1μm | 10μm | ||||
| 10-5961-02 | 0.25 g | 0.25 | 2.58 | 72.67 | 43.6 | 27.25 | 19.82 | 14.53 | 3.63 |
| 10-5961-90 | 100 µmol | 0.1 | 1 | 20 | 12 | 7.5 | 5.45 | 4 | 1 |
| 10-5961-95 | 50 µmol | 0.05 | 0.5 | 3.33 | 2 | 1.25 | 0.91 | 0.67 | 0.17 |
Expedite
| Catalog # | Pack Size | Grams/Pack | Dilution (mL) | Approximate Number of Additions | ||||
|---|---|---|---|---|---|---|---|---|
| Molarity | 50nm | 0.2μm | 1μm | 15μm | ||||
| 10-5961-02 | 0.25 g | 0.25 | 3.86 | 0.07 | 70.8 | 44.25 | 32.18 | 4.43 |
| 10-5961-90 | 100 µmol | 0.1 | 1.5 | 0.07 | 23.6 | 14.75 | 10.73 | 1.48 |
| 10-5961-95 | 50 µmol | 0.05 | 0.75 | 0.07 | 8.6 | 5.38 | 3.91 | 0.54 |
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