Leadgene Leadgene
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  • Specifications
    • Species of Origin

      Streptococcus pyogenes

      Expression system

      Escherichia coli

    • Affinity Tag

      His Tag (C-term)


      Lyophilized from a 0.2 µm filtered solution of PBS, pH 7.4.

    • Purity

      >90% as determined by SDS-PAGE analysis.

      Molecular weight

      The protein has a calculated MW of 169.29 kDa.
      The protein migrates as 130-180 kDa under reducing condition (SDS-PAGE analysis).

    • Endotoxin level

      <0.1 EU per 1 μg of the protein by the LAL method.



  • Background
    • Background

      dCas9-VP64 refers to the dCas9 protein (#PDB: 5Y36_A) fused with the VP64 transcription activation domain, which is used in CRISPR-based gene activation. Comprising a deactivated Cas9 (dCas9) protein and VP64 transcriptional activator, it precisely targets gene promoters, enhancing gene expression without altering the DNA sequence. dCas9-VP64 offers a versatile tool for studying gene function, disease mechanisms, and potential therapeutic interventions.
      dCas9 protein is an endonuclease-inactive version of Cas9 (CRISPR associated protein 9). dCas9 lacks endonuclease activity so that it binds but does not cleave cognate DNA, which can be used to localize transcriptional activators or repressors to specific DNA sequences in order to control transcription.


      CRISPR-associated endonuclease Cas9/Csn1, SpCas9, SpyCas9

    • Sequence Note


  • Instruction
    • Reconstitution

      It is recommended to reconstitute the lyophilized protein in sterile H₂O to a concentration not less than 200 μg/mL and incubate the stock solution for at least 20 min to ensure sufficient re-dissolved.


      The product is shipped with polar packs. Upon receipt, store it immediately at -20°C or lower for long term storage.

    • Stability & Storage

      This product is stable after storage at:

      • -20°C for 12 months in lyophilized state from date of receipt.
      • -20°C or -80°C for 1 month under sterile conditions after reconstitution.

      Avoid repeated freeze/thaw cycles.

  • Image
    SDS-PAGE analysis of recombinant dCas9–VP64.

    SDS-PAGE analysis of recombinant dCas9–VP64.

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  • Datasheet & Documents

Disclaimer:For Research Use or Further Manufacturing Only.

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