Glen Research Product Information

Catalog Number: 10-1091-xx
Description: 5-I-dU-CE Phosphoramidite

5'-Dimethoxytrityl-5-iodo-2'-deoxyUridine,3'-[(2-cyanoethyl)- (N,N-diisopropyl)]-phosphoramidite

Formula: C39H46IN4O8
M.W.: 856.69 
F.W.: 416.07 

Diluent: Anhydrous Acetonitrile

Coupling: No changes needed from standard method recommended by synthesizer manufacturer.

Deprotection: Mild deprotection: Ammonium Hydroxide for 24 hours at room temperature

Storage: Refrigerated storage, maximum of 2-8°C, dry

Stability in Solution: 24 hours

   

Pricing Information

Catalog Number

Pack Size

Price (US$)


10-1091-90
100µm
60.00
10-1091-02
0.25g
160.00

Related Document(s)

  

FREQUENTLY ASKED TECHNICAL QUESTION

QUESTION: What methods are available for crosslinking DNA with DNA, RNA, proteins?

RESPONSE:The most widely used method seems to be using Br-dU and, more recently, I-dU (1). The substitution of photoreactive Br and I for the 5-Me group of thymidine is attractive since their radii are similar to that of the methyl group. These modifications do not significantly affect the binding of oligonucleotides with proteins. Br-dU is irradiated at 308nm and crosslinking is typically not greater than 40%. Crosslinking of I-dU at 308nm is higher but is optimal at 325nm. Laser excitation is preferred.

After the synthesis of oligonucleotides containing Br-dU or I-dU, care must be taken to avoid loss of the halogens. Even though both modifications are quite stable to ammonium hydroxide, it is sensible to play safe and carry out the deprotection at room temperature for 24 hours. Even better, use the UltraMild monomers and deprotect with potassium carbonate in methanol at room temeperature. The oligonucleotide products should be protected from light - plastic tubes and amber vials are safe. Gel electrophoresis should be carried out protected from light.

REFERENCE(S):
(1) M.C. Willis, B.J. Hicke, O.C. Uhlenbeck, T.R. Cech and T.H. Koch, Science, 1993, 262, 1255.


QUESTION: What are the extinction coefficients for propynyl-dC and dU? Also Halogenated dC and dU derivatives? Others?

RESPONSE:See: Table of Extinction Coefficients

REFERENCE(S):
B. Froehler, Gilead
M. Powell
R. Somers


EXTINCTION DATA

ItemNucleosideλMax-1Emax-1λMax-2Emax-2E260
(nm)(ml/µmole)nm(ml/µmole)(ml/µmole)
10-10915-I-dU2877.73.7

DILUTION/COUPLING DATA

The table below shows pack size data and, for solutions, dilutions and approximate couplings based on normal priming procedures. Please link for more detailed usage information with the various synthesizers.

ABI 392/394
Cat.No.Pack
Size
Grams/
Pack
0.1M Dil.
(mL)
LV40LV20040nm0.2µm1µm10µm
Approximate Number of Additions
10-1091-020.25grams.25grams2.928450.431.522.9116.84.2
10-1091-90100µmoles.086grams120127.55.4541
Expedite
Cat.No.Pack
Size
Grams/
Pack
Dilution
(mL)
Molarity50nm0.2µm1µm15µm
Approximate Number of Additions
10-1091-020.25grams.25grams4.36.0780.850.536.735.05
10-1091-90100µmoles.086grams1.5.0723.614.7510.731.48

 

 

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01/20/2019

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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