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siRNA
 

The most widely used siRNA are 21-mer. Most of the time, they are composed of 19 double stranded RNA bases and 2 single stranded DNA bases (usually two Thymidine) in 3’.

siRNA principle
Principle of siRNA-mediated RNA interference. The annealed siRNA enter the cell (1). Once inside, double stranded RNA is recognised by the RISC complex. Sense strand siRNA is displaced and the mRNA anneal to the antisense siRNA fixed to the RISC complex (2). mRNA is digested (3) and the RISC complex containing the siRNA is then recycled to begin a new cycle (4).


Eurogentec has co-developed an exclusive siRNA design platform. PhD-level scientists of our design team use this reliable interface to design custom siRNA for any target of your choice. Eurogentec guarantees up to 80% minimum silencing of your gene of interest with at least one of the 3 duplexes designed and synthesised.

Certain modifications can sometimes be useful to increase stability or cellular uptake e.g. Modifying siRNA with cholesterol is used to facilitate tissue / cellular uptake.

Various fluorescent dyes can be coupled to the 5’-end of the sense strand oligonucleotide to track transfection efficiency of the corresponding duplex. Please note that the antisense strand must either have a free 5’-OH (by default) or 5’-phosphate terminus.


Control siRNA Duplexes


In order to monitor your siRNA experiment conditions, Eurogentec provides siRNA control duplexes and kits including negative and positive controls necessary to validate your experiment.

  • Negative controls are siRNA molecules presenting no homology with any known eukaryotic gene. siRNA controls are already annealed and shipped in solution. The sequence is properly validated.
  • Positive controls consist of siRNA directed against a range of endogenous and reporter genes. They are available in 5 nmol final quantities. Each control contains 1 siRNA duplex.

All siRNA control duplexes are PAGE purified and 100 % MALDI-TOF Mass Spectrometry controlled. The sequences are validated and published.



Purification


  SePOP Desalted IEX/RP-HPLC In Vivo*
Desalting by precipitation V V V
MALDI-TOF QC V V V
IEX/RP HPLC   V V (IEX only)
Duplexed V V V
Desalting by size exclusion chromatography     V
Sterile filtration     V
Lyophilisation     V


Comparison between the SePOP and HPLC purifications and the in vivo process method for a siRNA duplex.
*Production process endotoxin tested
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Custom siRNA duplexes

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  1. siRNA Duplex SePOP 200 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-NP001-100
    TVA inclus
    1.963,50 RON
  2. siRNA Duplex SePOP 60 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-NP001-020
    TVA inclus
    1.463,70 RON
  3. siRNA Duplex SePOP 22 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-NP001-004
    TVA inclus
    1.035,30 RON
  4. siRNA Duplex SePOP 7 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-NP001-001
    TVA inclus
    785,40 RON
  5. siRNA Duplex IEX-HPLC 20 µmole scale, 1 duplex, Cod Catalog Eurogentec: SR-IE001-M20
    TVA inclus
    11.899.998,81 RON
  6. siRNA Duplex IEX-HPLC 10 µmole scale, 1 duplex, Cod Catalog Eurogentec: SR-IE001-M10
    TVA inclus
    11.899.998,81 RON
  7. siRNA Duplex IEX-HPLC 5 µmole scale, 1 duplex, Cod Catalog Eurogentec: SR-IE001-M05
    TVA inclus
    11.899.998,81 RON
  8. siRNA Duplex IEX-HPLC 2,5 µmole scale, 1 duplex, Cod Catalog Eurogentec: SR-IE001-M02
    TVA inclus
    11.899.998,81 RON
  9. siRNA Duplex IEX-HPLC 80 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-IE001-100
    TVA inclus
    2.784,60 RON
  10. siRNA Duplex IEX-HPLC 40 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-IE001-020
    TVA inclus
    2.070,60 RON
  11. siRNA Duplex IEX-HPLC 12 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-IE001-004
    TVA inclus
    1.420,86 RON
  12. siRNA Duplex IEX-HPLC 3 nmol delivered, 1 duplex, Cod Catalog Eurogentec: SR-IE001-001
    TVA inclus
    1.071,00 RON
  13. siRNA Duplex RP-HPLC 20 µmol scale, 1 duplex, Cod Catalog Eurogentec: SR-HP001-M20
    TVA inclus
    11.899.998,81 RON
  14. siRNA Duplex RP-HPLC 10 µmol scale, 1 duplex, Cod Catalog Eurogentec: SR-HP001-M10
    TVA inclus
    11.899.998,81 RON
  15. siRNA Duplex RP-HPLC 5 µmol scale, 1 duplex, Cod Catalog Eurogentec: SR-HP001-M05
    TVA inclus
    11.899.998,81 RON
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