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dideoxy A 5' (2'3' ddA)

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picture of dideoxy A 5' (2'3' ddA)

Modification : ddA-5'

Catalog Reference Number
Modification Code
5 Prime
3 Prime
Molecular Weight (mw)
Extinction Coeficient (ec)
Technical Info (pdf)
Absorbance MAX
Emission MAX
Absorbance EC

End Blockers

Catalog NoScalePrice
26-6331-0550 nmol$195.00
26-6331-02200 nmol$195.00
26-6331-011 umol$292.00
26-6331-032 umol$438.00
26-6331-1010 umol$2,336.00
26-6331-1515 umol$2,920.00
Discounts are available for ddA-5'!
Modification* Discount Price Structure
1 site/order List price
2 sites/order 10% discount
3 sites/order 20% discount
4 sites/order 30% discount
5-9 sites/order 50% discount
10+ sites/order 60% discount
*Exceptions apply
Related Modifications
ddG-5' ddT-5' ddC-3'

Dideoxyadenosine (ddA) is a dideoxyribonucleoside that can only be used to block the 5' end. Use ddC-3' or Spacer C3 to block the 3' end from polymerase extension. ddA is a synthetic analog of deoxyadenosine, in ddA, both the 2' and 3positions of the ribose have a hydrogen (H) group substituted for the OH group, whereas in dA, only the 2'-position is so substituted. ddA is added to the 5'-end of an oligo via 5' to -5' synthesis, using a 2',3' ddA, 5'-phosphoramidite. Purification must be by PAGE purification, since such an oligo will not have a trityl group (necessary for RPC purification).

ddC-3' should be used as a 3-end blocking moiety (see ddC technical sheet).

- dideoxy A 5' (2'3' ddA)

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