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Oligo Modifications List | Oligo Modifications Reference Category
Modification : 5-Ethynyl-dU (5EdU)
Reference Catalog Number 26-6615
Category Click Chemistry
Modification Code 5EdU
5 Prime Y
3 Prime Y
Internal Y
Molecular Weight (mw) 314.19
Extinction Coeficient (ec) 5.1
Technical Info (pdf) PS26-6615
Catalog NoScalePrice
26-6615-0550 nmol$294.00
26-6615-02200 nmol$294.00
26-6615-011 umol$382.20
26-6615-032 umol$573.00
26-6615-1010 umol$3,057.60
26-6615-1515 umol$3,822.00

Discounts are available for 5-Ethynyl-dU (5EdU)!
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
Alkyne C8 dT
Hexynyl (Alkyne) Modifier (5')
Alkyne- Serinol
Alkyne-C2 NHS
Alkyne C8 dC

This modification is on HOLD pending licensing arrangements with baseclick GmbH


5-Ethynyl-dU offers convenient click conjugation with an azide to generate a label rigidly attached to one of the oligonucleotide bases. The alkyne group is separated from the oligo by an 11-atom spacer arm, which serves to reduce steric interaction between the reactive group and the oligo. The presence of the alkyne allows the user to use “Click Chemistry” (a [3+2] cycloaddition reaction between alkynes and azides, using copper (I) iodide as a catalyst) to conjugate it to a variety of azide-containing labels/tags (e.g., fluorescent dyes, biotin, or oligos, with extremely high regioselectivity and efficiency (1,2). When conjugation to an azide-oligo is desired, preparation of the azide-oligo can be achieved using either an Azidobutyrate NHS Ester or the 5’-Bromohexyl modifier (see their respective tech sheets for details). Click chemistry can be used to form short, cyclic oligos that can be used as research tools in various biophysical and biological studies (3). In particular, they have considerable potential for in vivo work, as cyclic oligos are known to be very stable in serum for up to several days.

References
1. Huisgen, R. Angew. Chem. Int. Ed. (1963), 2: 565-568.
2. Rostovtsev, V.V., Green, L.G., Fokin, V.V., Sharpless, K.B. A Stepwise Huisgen Cycloaddition Process: Copper(I)-Catalyzed Regioselective Ligation of Azides and Terminal Alkynes. Angew. Chem. Int. Ed. (2002), 41: 2596-2599.
3. Kumar, R., El-Sagheer, A., Tumpane, J., Lincoln, P., Wilhelmsson, L.M., Brown, T. Template-Directed Oligonucleotide Strand Ligation, Covalent Intramolecular DNA Circularization and Catenation Using Click Chemistry. J. Am. Chem. Soc. (2007), 129: 6859-6864.
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