Recombinant Anti-QKI antibody [EPR7306] (Alexa Fluor® 647) (ab223419)


  • Product name

    Anti-QKI antibody [EPR7306] (Alexa Fluor® 647)
    See all QKI primary antibodies
  • Description

    Rabbit monoclonal [EPR7306] to QKI (Alexa Fluor® 647)
  • Host species

  • Conjugation

    Alexa Fluor® 647. Ex: 652nm, Em: 668nm
  • Tested applications

    Suitable for: ICC/IFmore details
  • Species reactivity

    Reacts with: Mouse
    Predicted to work with: Rat, Human
  • Immunogen

    Synthetic peptide corresponding to Human QK1 aa 250-350.
    Database link: Q96PU8

  • Positive control

    • ICC/IF: Neuro-2a cells
  • General notes

    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents.

    Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company. The Alexa Fluor® dye included in this product is provided under an intellectual property license from Life Technologies Corporation. As this product contains the Alexa Fluor® dye, the purchase of this product conveys to the buyer the non-transferable right to use the purchased product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). As this product contains the Alexa Fluor® dye the sale of this product is expressly conditioned on the buyer not using the product or its components, or any materials made using the product or its components, in any activity to generate revenue, which may include, but is not limited to use of the product or its components: in manufacturing; (ii) to provide a service, information, or data in return for payment (iii) for therapeutic, diagnostic or prophylactic purposes; or (iv) for resale, regardless of whether they are sold for use in research. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or



Our Abpromise guarantee covers the use of ab223419 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF 1/100.

This product gave a positive signal in Neuro-2a cells fixed with 4% formaldehyde (10 min)


  • Function

    RNA-binding protein that plays a central role in myelinization (PubMed:16641098). Binds to the 5'-NACUAAY-N(1,20)-UAAY-3' RNA core sequence. Regulates target mRNA stability (PubMed:23630077). In addition, acts by regulating pre-mRNA splicing, mRNA export and protein translation. Required to protect and promote stability of mRNAs such as MBP and CDKN1B. Regulator of oligodendrocyte differentiation and maturation in the brain that may play a role in myelin and oligodendrocyte dysfunction in schizophrenia (PubMed:16641098). Participates in mRNA transport by regulating the nuclear export of MBP mRNA. Also involved in regulation of mRNA splicing of MAG pre-mRNA. Acts as a translational repressor.
  • Tissue specificity

    Expressed in the frontal cortex of brain. Down-regulated in the brain of schizophrenic patients.
  • Sequence similarities

    Contains 1 KH domain.
  • Domain

    The KH domain and the Qua2 region are involved in RNA binding.
  • Post-translational

    Methylated by PRMT1.
    Tyrosine phosphorylated at its C-terminus, probably by FYN. Phosphorylation leads to decreased mRNA-binding affinity, affecting transport and/or stabilization of MBP mRNA.
  • Cellular localization

    Nucleus. Cytoplasm.
  • Information by UniProt
  • Database links

  • Alternative names

    • DKFZp586I0923 antibody
    • HKQ antibody
    • Homolog of mouse quaking QKI KH domain RNA binding protein antibody
    • Hqk antibody
    • HQK1 antibody
    • HqkI antibody
    • OTTHUMP00000017581 antibody
    • OTTHUMP00000017582 antibody
    • OTTHUMP00000017583 antibody
    • Protein quaking antibody
    • QK antibody
    • QK1 antibody
    • QK3 antibody
    • QKI antibody
    • QKI_HUMAN antibody
    • QKI1 antibody
    • Quaking homolog antibody
    • Quaking homolog KH domain RNA binding antibody
    • Quaking homolog KH domain RNA binding mouse antibody
    • Quaking isoform 1 antibody
    • Quaking protein antibody
    • RNA binding protein HQK antibody
    see all


  • ab223419 staining QK1 in Neuro-2a cells. The cells were fixed with 4% formaldehyde (10 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated overnight at +4°C with ab223419 at 1/100 dilution (shown in red) and ab195887, Mouse monoclonal to alpha Tubulin (Alexa Fluor® 488), at 1/250 dilution (shown in green). Nuclear DNA was labelled with DAPI (shown in blue).

    Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).


ab223419 has not yet been referenced specifically in any publications.

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