Spermine Phosphoramidite - (10-1939)
N¹-[4-(4,4'-Dimethoxytrityloxy)butyl]-N¹,N4,N9,N¹²-tetrakis(trifluoroacetyl)-spermine-N¹²-butyl-4-[(2-cyanoethyl)-(N,N-diisopropyl)]-phosphoramidite
N¹-[4-(4,4'-Dimethoxytrityloxy)butyl]-N¹,N4,N9,N¹²-tetrakis(trifluoroacetyl)-spermine-N¹²-butyl-4-[(2-cyanoethyl)-(N,N-diisopropyl)]-phosphoramidite
Spermine phosphoramidite is used to produce oligospermine-oligonucleotide conjugates - Zip Nucleic Acids (ZNA®) Oligos. The name reflects the presumed mode of action. The conjugates are believed to use the oligospermine to seek out and move along (scan) oligonucleotide strands until the probe complementary sequence is located. The oligospermine then performs the function of stabilizing the formed duplex by reducing electrostatic repulsion, thereby leading to significantly increased binding affinities. ZNA® Oligos have found use in the following applications: Multiplex PCR; PCR of AT-rich Regions; RT qPCR; Detection of MicroRNA; Improved SNP Discrimination; and Antisense and Antigene Effects. Spermine phosphoramidite is simple to use in oligonucleotide synthesis and can be added multiple times at the 3' or 5' terminus. Deprotection and isolation are also straightforward. HPLC analysis of the conjugates requires high pH to suppress the ionization of the spermine residues.
Usage
- Coupling: 3 minute coupling time recommended.
- Deprotection: Prior to cleavage, treat support with 10% diethylamine in acetonitrile for 5 minutes at room temperature and rinse with acetonitrile to remove the cyanoethyl protecting groups. Then deprotect using 30% ammonium hydroxide as required by nucleobases. (Note a minimum of 4 hours at room temperature, or approximately 30 minutes at 55°C, is required to remove the TFA protecting groups.)
| 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 | ||||
| 10-1939-02 | 0.25 g | .25grams | 2.03 | 54.33 | 32.6 | 20.38 | 14.82 | 10.87 | 2.72 |
| 10-1939-90 | 100 µmol | .123grams | 1 | 20 | 12 | 7.5 | 5.45 | 4 | 1 |
| 10-1939-95 | 50 µmol | .062grams | 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 | ||||
| 10-1939-02 | 0.25 g | .25grams | 3.03 | 0.07 | 54.2 | 33.88 | 24.64 | 3.39 |
| 10-1939-90 | 100 µmol | .123grams | 1.5 | 0.07 | 23.6 | 14.75 | 10.73 | 1.48 |
| 10-1939-95 | 50 µmol | .062grams | 0.75 | 0.07 | 8.6 | 5.38 | 3.91 | 0.54 |
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