• Product nameAnti-FMRP antibody
    See all FMRP primary antibodies
  • Description
    Rabbit polyclonal to FMRP
  • Tested applicationsSuitable for: ICC/IF, WB, IHC-FoFr, IHC-Pmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 600 to the C-terminus of Human FMRP.

  • Positive control
    • This antibody gave a positive signal in HeLa whole cell lysate and HeLa nuclear lysate. This antibody gave a positive result when used in the following formaldehyde fixed cell lines: SKNSH.
  • General notesab27455 does not recognise endogenous FMRP (expected size 71 kDa) in human testes lysate, which may be due to low expression levels of FMRP.


Associated products


Our Abpromise guarantee covers the use of ab27455 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 Use a concentration of 5 µg/ml.
WB Use a concentration of 1 µg/ml. Detects a band of approximately 85 kDa (predicted molecular weight: 71 kDa).
IHC-FoFr Use at an assay dependent concentration.
IHC-P Use a concentration of 1 µg/ml. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.


  • FunctionTranslation repressor. Component of the CYFIP1-EIF4E-FMR1 complex which binds to the mRNA cap and mediates translational repression. In the CYFIP1-EIF4E-FMR1 complex this subunit mediates translation repression (By similarity). RNA-binding protein that plays a role in intracellular RNA transport and in the regulation of translation of target mRNAs. Associated with polysomes. May play a role in the transport of mRNA from the nucleus to the cytoplasm. Binds strongly to poly(G), binds moderately to poly(U) but shows very little binding to poly(A) or poly(C).
  • Tissue specificityHighest levels found in neurons, brain, testis, placenta and lymphocytes. Also expressed in epithelial tissues and at very low levels in glial cells.
  • Involvement in diseaseDefects in FMR1 are the cause of fragile X syndrome (FRAX) [MIM:300624]. Fragile X syndrome is a common genetic disease (has a prevalence of one in every 2000 children) which is characterized by moderate to severe mental retardation, macroorchidism (enlargement of the testicles), large ears, prominent jaw, and high-pitched, jocular speech. The defect in most fragile X syndrome patients results from an amplification of a CGG repeat region which is directly in front of the coding region.
    Defects in FMR1 are the cause of fragile X tremor/ataxia syndrome (FXTAS) [MIM:300623]. In FXTAS, the expanded repeats range in size from 55 to 200 repeats and are referred to as 'premutations'. Full repeat expansions with greater than 200 repeats results in fragile X mental retardation syndrome [MIM:300624]. Carriers of the premutation typically do not show the full fragile X syndrome phenotype, but comprise a subgroup that may have some physical features of fragile X syndrome or mild cognitive and emotional problems.
    Defects in FMR1 are the cause of premature ovarian failure syndrome type 1 (POF1) [MIM:311360]. An ovarian disorder defined as the cessation of ovarian function under the age of 40 years. It is characterized by oligomenorrhea or amenorrhea, in the presence of elevated levels of serum gonadotropins and low estradiol.
  • Sequence similaritiesBelongs to the FMR1 family.
    Contains 2 KH domains.
  • Post-translational
    Phosphorylated on several serine residues.
  • Cellular localizationCytoplasm. Nucleus > nucleolus.
  • Information by UniProt
  • Database links
  • Alternative names
    • FMR 1 antibody
    • Fmr1 antibody
    • Fmr1 gene antibody
    • FMR1_HUMAN antibody
    • FMRP antibody
    • Fragile X mental retardation 1 antibody
    • Fragile X mental retardation 1 protein antibody
    • Fragile X mental retardation protein 1 antibody
    • Fragile X mental retardation protein antibody
    • fragile X mental retardation syndrome-related protein 1 antibody
    • fragile X mental retardation, autosomal homolog 1 antibody
    • FRAXA antibody
    • fxr1 antibody
    • MGC87458 antibody
    • POF antibody
    • POF1 antibody
    • Protein FMR-1 antibody
    • Protein FMR1 antibody
    • wu:fb16f11 antibody
    • wu:fd18c10 antibody
    • zgc:66226 antibody
    see all

Anti-FMRP antibody images

  • All lanes : Anti-FMRP antibody (ab27455) at 1 µg/ml

    Lane 1 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate
    Lane 2 : HeLa (Human epithelial carcinoma cell line) Nuclear Lysate

    Goat polyclonal to Rabbit IgG H&L (HRP) Pre-Adsorbed at 1/10000 dilution

    Predicted band size : 71 kDa
    Observed band size : 85 kDa (why is the actual band size different from the predicted?)
  • IHC image of FMRP staining in human cerebral cortex FFPE section, performed on a Leica BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab27455, 1µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.
  • ab27455 stained SKNSH cells. The cells were 4% formaldehyde fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab27455 at 5µg/ml overnight at +4°C. The secondary antibody (green) was DyLight® 488 goat anti- rabbit (ab96899) IgG (H+L) used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

References for Anti-FMRP antibody (ab27455)

This product has been referenced in:

See all 3 Publications for this product

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The lot currently in stock is 943249, we have 17 units left.

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Application Immunohistochemistry (PFA perfusion fixed frozen sections)
Sample Mouse Tissue sections (Brain)
Specification Brain

Dr. Sophie Pezet

Verified customer

Submitted Jul 29 2011

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Western blot
Sample Human Cell lysate - whole cell (HEK293T)
Specification HEK293T
Gel Running Conditions Reduced Denaturing (10%)
Blocking step Milk as blocking agent for 30 minute(s) · Concentration: 5% · Temperature: 37°C

Abcam user community

Verified customer

Submitted May 20 2008