Caspase 3 siRNA vector (ab12490)


  • Product name
    Caspase 3 siRNA vector
    See all siRNA Vector vectors
  • General notes

    pGB expression vectors contain the human U6 RNA polymerase III promoter, which directs constitutive, high-level expression of short RNA transcripts in many cells. Each vector also contains the neomycin/kanamycin-resistance gene to provide kanamycin resistance in bacteria and the G418 resistance in mammalian cells.


    The siRNA vectors have been tested in HeLa or 293 cell lines and the knockdowns were analyzed by Western blot analysis.


    The pGB siRNA vectors can be transfected into mammalian cells using Lipofectamine (Invitrogen). For transient transfection, cells can be analyzed in 24-96 hours following transfections, by Western blot analysis or other detection means. For stable transfections, cells can be selected in G418 selection medium to obtain stable cell lines with the specific gene blocked. 


  • Form
  • Storage instructions
    Store at +4°C short term (1-2 weeks). Aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.
  • Concentration information loading...
  • Vector notes
    The siRNA vectors have been tested in HeLa or 293 cell lines and the knockdowns were analyzed by Western blot analysis.
  • Research areas
  • Relevance
    Small interfering RNAs (siRNAs) are short, double-stranded RNA molecules that can target and degrade specific complementary mRNAs. The target gene-specific degradation is an effective means of gene suppression. Abcam's pGB siRNA vectors are designed to provide efficient, long-term suppression of a target gene in cultured mammalian cells and in vivo. The pGB vectors have been optimized for suppressing expression of target genes in mammalian cells by using the human U6 promotor (a RNA polymerase III promotor) which generates large amounts of siRNA in mammalian cells. The pGB expression vector also provides neomycin resistance marker for the selection of stable cell lines, permitting long-term suppression of the target gene. Validation: The antibodies listed as related products have not been previously used by Abcam to validate this vector. The siRNA vectors have been tested in HeLa and/or 293 cell lines. The siRNA-mediated knockdown was analyzed by Western blot.
  • Alternative names
    • siRNA vector
    • Small interfering ribose nucleic acid vector
    • Small interfering RNA vector


  • RNA Interference Mechanism

    Once processed, the vector expressed siRNA is incorporated into a multi-protein nuclease complex known as the RNA-induced silencing complex (RISC). Homology between the sense portion of the siRNA sequence and the mRNA enables the nuclease enzyme to bind and cleave the caspase transcript into small pieces, which are degraded by the cell's machinery.

  • pGB vector

    Features and Positions:

    Human U6 Promoter: 1-256
    Multiple cloning Site: 259-285
    SV40 Promoter: 470-808
    Neomycin / Kanamycin Resistance ORF: 843-1634
    5' Primer: 2789-2813 (CGTCGATTTTTGTGATGCTCGTCAG)
    pUC Origin of Replication: 2222-3003

  • Lane 1: Control siRNA

    Lane 2: Caspase 3 siRNA

    Caspase 3 siRNA vector ab12490 blocks caspase expression in HeLa cells. The caspase 3 siRNA Vector (ab12490) was transfected into HeLa cells using Lipofectmine (Invitrogen). The control vector (ab12505) with a siRNA sequence that has no homology to mammalian gene was also transfected as a negative control. The western blot was probed with a caspase-3 polyclonal antibody.


ab12490 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

Thank you for your enquiry. Ab12490 has been tested with human samples, specifically with HeLa or 293 cell lines (the knockdowns were analyzed by Western blot analysis). For the Western blot image located on the online datasheet, there was a mistake...

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I am writing in response to your technical enquiry concerning our siRNA vectors. The siRNA vectors have been tested in HeLa and/or 293 cell lines. The knockdown was analyzed by Western blot. I have now added the western blot image for the caspase 3...

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