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In this section: Gene Construction
In this section: Introduction | The Omni-Cleanâ„¢ System | The Omni-Pureâ„¢ Plasmid Purification System | The Omni-Pureâ„¢ Genomic DNA Purification System | Viral DNA & RNA Purification | Microbial DNA Purification | Plant DNA Purification
In this section: Introduction | Quality Control | Purification | Modifications | Long Oligos | Price List
In this section: Introduction | Molecular Beacon FAQ's | Fluorescent Probes Price List | Other Fluorescent Molecular Probes
In this section: SPCT | DME SPCT Intro | Order DME TaqMan® Assays SPCT | SNP PCT Search | Gene Expression Assays | SPCT Design Center | GeneAssays
In this section: RNA Oligonucleotides | Quality Control | Purification | Modifications | RNAi Explorerâ„¢ Products and Prices | Custom RNAi | RNAi Design Guidelines | SmartBaseâ„¢ siRNA Modifications | shRNA Explorerâ„¢
In this section: PCR Amplification & Analysis
In this section: Introduction | Genemerâ„¢ | GeneProberâ„¢ | Proberâ„¢ Gene Detection Kits | GScanâ„¢ Gene Detection Kits | Genemerâ„¢ Control DNA | Infectious Diseases
In this section: Gene Construction
In this section: Introduction | The Omni-Cleanâ„¢ System | The Omni-Pureâ„¢ Plasmid Purification System | The Omni-Pureâ„¢ Genomic DNA Purification System | Viral DNA & RNA Purification | Microbial DNA Purification | Plant DNA Purification
7-deaza-8-aza-dA
Modification : 7-deaza-8-aza-dA
Catalog Reference Number
Category
Modification Code
5 Prime
3 Prime
Internal
Molecular Weight (mw)
Extinction Coeficient (ec)
Technical Info (pdf)
Absorbance MAX
Emission MAX
Absorbance EC
26-6904
Structural Studies
[7-deaza-dA]
Y
Y
Y
313.2
15.4
PS26-6904.pdf
260
-
15.4
Catalog No | Scale | Price | 26-6904-05 | 50 nmol | $355.00 | 26-6904-02 | 200 nmol | $355.00 | 26-6904-01 | 1 umol | $461.50 | 26-6904-03 | 2 umol | $692.25 | 26-6904-10 | 10 umol | $3,692.00 | 26-6904-15 | 15 umol | $4,615.00 | 26-6904-15 | 15 umol | $4,615.00 |
7-deaza-8-aza-deoxyadenosine (7-deaza-8-aza-dA) is a deoxyribonucleoside in which the 7-nitrogen and 8-carbon are flipped. The resulting modified dA is unable to form a hydrogen bond at position 7, but can at position 8, of the base. The result is that the 7-deaza-8-aza-dA : dT base pair has essentially the same duplex stability as that of the unmodified A : T base pair, and is more stable than the 7-deaza-dA : dT base pair (1). Similar to 7-deaza-dA, 7-deaza-8-aza-dA can be used for modulate the amount of structural DNA bending existing within long polyA regions of single- and double-stranded oligonucleotides (2).
Furthermore, 7-deaza-8-aza-dA is specifically recommended over 7-deaza-dA whenever multiple insertions of a 7-deaza-dA-type modification into an oligo must be done. This is because 7-deaza-8-aza-dA is stable to the iodine-based oxidizer solution used in phosphoramidite-based DNA synthesis, while 7-deaza-dA is sensitive to it.
References
1. Seela, F.; Zulauf, M. Synthesis of oligonucleotides containing pyrazola[3,4-d]pyrimidines: The influence of 7-substituted 8-aza-7-deazaadenines on the duplex structure and stability. J. Chem. Soc., Perkin Trans. (1999), 1: 479-488.
2. Seela, F.; Grein, T. 7-Deaza-2’-deoxyadenosine and 3-deaza-2’-deoxyadenosine replacing dA within d(A6)-tracts: differential bending at 3’- and 5’-junctions of d(A6)-d(T6) and B-DNA. Nucleic Acids Res. (1992), 20: 2297-2306.
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