Home | Products | Oligo Technology | Fluorescent Probes | Modifications | Oligo Design Tools | Online Order

Oligo Modifications List | Oligo Modifications Reference Category
Modification : ddA-5'
Reference Catalog Number 26-6331
Category End Blockers
Modification Code ddA-5
5 Prime Y
3 Prime N
Internal N
Molecular Weight (mw) 297.21
Extinction Coeficient (ec) 15.4
Technical Info (pdf) PS26-6331.pdf
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

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 3’-positions 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).


Enter the letters you see above for verification:
Order Status | Customer Service | Site Map | Request Literature | About e-oligos | Contact Us |   Search
January 15, 2021 e-oligos(tm) is a brand of Gene Link. e-oligos(tm) and the binary helix(tm) All graphic art is a trade mark of Gene Link, Inc. Copyright 2021
    Terms and Conditions    Licenses    Privacy Policy