Recombinant Anti-CUG-BP1 antibody [EPR8298(B)] (Alexa Fluor® 488) (ab203844)


  • Product name

    Anti-CUG-BP1 antibody [EPR8298(B)] (Alexa Fluor® 488)
    See all CUG-BP1 primary antibodies
  • Description

    Rabbit monoclonal [EPR8298(B)] to CUG-BP1 (Alexa Fluor® 488)
  • Host species

  • Conjugation

    Alexa Fluor® 488. Ex: 495nm, Em: 519nm
  • Tested applications

    Suitable for: Flow Cyt, ICC/IFmore details
  • Species reactivity

    Reacts with: Human
  • Immunogen

    Synthetic peptide corresponding to N-terminal residues of Human CUG-BP1 (Q92879).

  • Positive control

    • ICC/IF: HeLa cells. Flow Cyt: HeLa 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

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab203844 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
Flow Cyt 1/50.
ICC/IF 1/100.

This product gave a positive signal in HeLa cells fixed with 4% formaldehyde (10 min) and 100% methanol (5 min).


  • Function

    RNA-binding protein implicated in the regulation of several post-transcriptional events. Involved in pre-mRNA alternative splicing, mRNA translation and stability. Mediates exon inclusion and/or exclusion in pre-mRNA that are subject to tissue-specific and developmentally regulated alternative splicing. Specifically activates exon 5 inclusion of cardiac isoforms of TNNT2 during heart remodeling at the juvenile to adult transition. Acts as both an activator and repressor of a pair of coregulated exons: promotes inclusion of the smooth muscle (SM) exon but exclusion of the non-muscle (NM) exon in actinin pre-mRNAs. Activates SM exon 5 inclusion by antagonizing the repressive effect of PTB. Promotes exclusion of exon 11 of the INSR pre-mRNA. Inhibits, together with HNRNPH1, insulin receptor (IR) pre-mRNA exon 11 inclusion in myoblast. Increases translation and controls the choice of translation initiation codon of CEBPB mRNA. Increases mRNA translation of CEBPB in aging liver (By similarity). Increases translation of CDKN1A mRNA by antagonizing the repressive effect of CALR3. Mediates rapid cytoplasmic mRNA deadenylation. Recruits the deadenylase PARN to the poly(A) tail of EDEN-containing mRNAs to promote their deadenylation. Required for completion of spermatogenesis (By similarity). Binds to (CUG)n triplet repeats in the 3'-UTR of transcripts such as DMPK and to Bruno response elements (BREs). Binds to muscle-specific splicing enhancer (MSE) intronic sites flanking the alternative exon 5 of TNNT2 pre-mRNA. Binds to AU-rich sequences (AREs or EDEN-like) localized in the 3'-UTR of JUN and FOS mRNAs. Binds to the IR RNA. Binds to the 5'-region of CDKN1A and CEBPB mRNAs. Binds with the 5'-region of CEBPB mRNA in aging liver.
  • Tissue specificity

  • Sequence similarities

    Belongs to the CELF/BRUNOL family.
    Contains 3 RRM (RNA recognition motif) domains.
  • Post-translational

    Phosphorylated. Its phosphorylation status increases in senescent cells.
  • Cellular localization

    Nucleus. Cytoplasm. RNA-binding activity is detected in both nuclear and cytoplasmic compartments.
  • Information by UniProt
  • Database links

  • Alternative names

    • 50 kDa Nuclear polyadenylated RNA binding protein antibody
    • 50 kDa nuclear polyadenylated RNA-binding protein antibody
    • Bruno like 2 antibody
    • bruno like protein 2 antibody
    • Bruno-like protein 2 antibody
    • BRUNOL 2 antibody
    • BRUNOL2 antibody
    • CELF 1 antibody
    • CELF-1 antibody
    • celf1 antibody
    • CELF1 CUGBP, Elav like family member 1 antibody
    • CELF1_HUMAN antibody
    • CUG BP and ETR 3 like factor 1 antibody
    • CUG BP antibody
    • CUG BP1 antibody
    • CUG RNA binding protein antibody
    • CUG triplet repeat RNA binding protein 1 antibody
    • CUG triplet repeat RNA-binding protein 1 antibody
    • CUG-BP antibody
    • CUG-BP- and ETR-3-like factor 1 antibody
    • CUG-BP1 antibody
    • CUGBP 1 antibody
    • CUGBP and ETR3 like factor 1 antibody
    • CUGBP antibody
    • CUGBP Elav like family member 1 antibody
    • CUGBP Elav-like family member 1 antibody
    • CUGBP1 antibody
    • Cytidine uridine guanosine binding protein 1 antibody
    • Deadenylation factor CUG BP antibody
    • Deadenylation factor CUG-BP antibody
    • Deadenylation factor CUGBP antibody
    • EDEN BP antibody
    • EDEN BP homolog antibody
    • EDEN-BP antibody
    • EDEN-BP homolog antibody
    • embryo deadenylation element binding protein antibody
    • embryo deadenylation element binding protein homolog antibody
    • Embryo deadenylation element-binding protein homolog antibody
    • hNab 50 antibody
    • hNab50 antibody
    • NAB 50 antibody
    • NAB50 antibody
    • NAPOR antibody
    • Nuclear polyadenylated RNA binding protein 50 kD antibody
    • Nuclear polyadenylated RNA binding protein antibody
    • RNA binding protein BRUNOL 2 antibody
    • RNA binding protein BRUNOL2 antibody
    • RNA-binding protein BRUNOL-2 antibody
    see all


  • Overlay histogram showing HeLa cells stained with ab203844 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab203844, 1/50 dilution) for 30 min at 22°C. Isotype control antibody (black line) was rabbit monoclonal IgG [EPR25A] Alexa Fluor® 488 (ab199091) used at the same concentration and conditions as the primary antibody. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter. This antibody gave a positive signal in HeLa cells fixed with 4% formaldehyde (10 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.
  • ab203844 staining CUG-BP1 in HeLa 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 ab203844 at a 1/100 dilution (shown in green) and ab202272, Rabbit monoclonal to alpha Tubulin (Alexa Fluor® 594), at a 1/250 dilution (shown in red). Nuclear DNA was labelled with DAPI (shown in blue).

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

    This product also gave a positive signal under the same testing conditions in HeLa cells fixed with 100% methanol (5 min)


This product has been referenced in:

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