• Product name

    Anti-EIF2B5 (phospho S539) antibody
    See all EIF2B5 primary antibodies
  • Description

    Rabbit polyclonal to EIF2B5 (phospho S539)
  • Host species

  • Specificity

    This ab reacts with both human and rat (see, for example, PMID 21165642, 20484009 and 21832246) but it is not very clear if this recognition happens only when S535 (rat) and S544 (human) are phosphorylated or when S535 (rat)/S540 (human) are phosphorylated.
  • Tested applications

    Suitable for: WBmore details
  • Species reactivity

    Reacts with: Rat, Human
  • Immunogen

    Synthetic peptide corresponding to Rat EIF2B5.
    (Peptide available as ab5332)

  • Positive control

    • Recombinant eIF-2B epsilon treated with GSK 3 beta and lambda phosphatase, CHO-T cells transfected with human insulin receptor (IR) +/- insulin.
  • General notes

     This product was previously labelled as eIF2B epsilon



  • Form

  • Storage instructions

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.
  • Storage buffer

    pH: 7.30
    Preservative: 0.05% Sodium azide
    Constituents: PBS, 0.1% BSA

    BSA is IgG and protease free
  • Concentration information loading...
  • Purity

    Immunogen affinity purified
  • Purification notes

    Purified from rabbit serum by sequential epitope-specific chromatography. The antibody has been negatively pre-adsorbed using (i) a non-phosphopeptide corresponding to the site of phosphorylation to remove antibody that is reactive with non-phosphorylated eukaryotic initiation factor 2B epsilon (eIF-2B epsilon), and (ii) a generic serine phosphorylated peptide to remove antibody that is reactive with phospho-serine, irrespective of the sequence. The final product is generated by affinity chromatography using an eIF-2B epsilon-derived peptide that is phosphorylated at serine 539.
  • Clonality

  • Isotype

  • Research areas


Our Abpromise guarantee covers the use of ab4775 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
WB Use a concentration of 0.1 - 1 µg/ml. Detects a band of approximately 88 kDa (predicted molecular weight: 82 kDa).


  • Function

    Catalyzes the exchange of eukaryotic initiation factor 2-bound GDP for GTP.
  • Involvement in disease

    Defects in EIF2B5 are a cause of leukodystrophy with vanishing white matter (VWM) [MIM:603896]. VWM is a leukodystrophy that occurs mainly in children. Neurological signs include progressive cerebellar ataxia, spasticity, inconstant optic atrophy and relatively preserved mental abilities. The disease is chronic-progressive with, in most individuals, additional episodes of rapid deterioration following febrile infections or minor head trauma. While childhood onset is the most common form of the disorder, some severe forms are apparent at birth. A severe, early-onset form seen among the Cree and Chippewayan populations of Quebec and Manitoba is called Cree leukoencephalopathy. Milder forms may not become evident until adolescence or adulthood. Some females with milder forms of the disease who survive to adolescence exhibit ovarian dysfunction. This variant of the disorder is called ovarioleukodystrophy.
  • Sequence similarities

    Belongs to the eIF-2B gamma/epsilon subunits family.
    Contains 1 W2 domain.
  • Information by UniProt
  • Database links

  • Alternative names

    • CACH antibody
    • CLE antibody
    • EI2BE_HUMAN antibody
    • EIF 2B antibody
    • eIF 2B GDP GTP exchange factor antibody
    • eIF 2B GDP GTP exchange factor subunit epsilon antibody
    • eIF-2B GDP-GTP exchange factor subunit epsilon antibody
    • EIF2B antibody
    • EIF2B5 antibody
    • EIF2BE antibody
    • EIF2Bepsilon antibody
    • Eukaryotic Translation Initiation Factor 2 Beta Epsilon antibody
    • Eukaryotic translation initiation factor 2B subunit 5 epsilon 82kDa antibody
    • Eukaryotic translation initiation factor 2B subunit 5 epsilon antibody
    • LVWM antibody
    • Translation initiation factor eIF 2B subunit epsilon antibody
    • Translation initiation factor eIF-2B subunit epsilon antibody
    see all


  • Peptide Competition: Recombinant eIF-2B episilon treated with lambda phosphatase (1) or treated with GSK-3 beta (lanes 2-5) and added to background extracts were resolved by SDS-PAGE on a 10% Tris-glycine gel and transferred to PVDF. Membranes were blocked with a 5% BSA-TBST buffer overnight at 4oC, then were incubated with 0.50 µg/mL ab4775 antibody, following prior incubation with: no peptide (1, 2), the nonphosphopeptide corresponding to the immunogen (3), a generic phophoserine containing peptide (4), or, the phosphopeptide immunogen (5). After washing, membranes were incubated with goat F(ab’)2 anti-rabbit IgG alkaline phosphatase and signals were detected using the Tropix WesternStar method. The data show that only the peptide corresponding to ab4775 blocks the antibody signal, thereby demonstrating the specificity of the antibody. The data also show the up-regulation of the ab4775 phospho signal upon stimulation with GSK-3 beta. Pep


This product has been referenced in:

  • Ayuso MI  et al. Stress Granule Induction after Brain Ischemia Is Independent of Eukaryotic Translation Initiation Factor (eIF) 2a Phosphorylation and Is Correlated with a Decrease in eIF4B and eIF4E Proteins. J Biol Chem 291:27252-27264 (2016). Read more (PubMed: 27836976) »
  • Sidrauski C  et al. Pharmacological brake-release of mRNA translation enhances cognitive memory. Elife 2:e00498 (2013). WB ; Human . Read more (PubMed: 23741617) »
See all 3 Publications for this product

Customer reviews and Q&As

1-3 of 3 Abreviews or Q&A


Thank you for your interest and for passing the customer's details.
Expiration date: [31/05/2012]
I am very pleased to hear you would like to accept our offer and test ab4775 in Mouse. This code will give you 1 free PRIMARY ANTIBODYbefore the expiration date. To redeem this offer, please submit an Abreview for Mouse and include this code in the “Additional Comments” section so we know the Abreview is for this promotion. For more information on how to submit an Abreview, please visit the site: www.abcam.com/Abreviews.
Remember, we publish both positive and negative Abreviews on our datasheets so please submit the results of your tests. The code will be active once the Abreview has been submitted and can be redeemed in one of the following ways: 1) Call to place your order and mention the code to our customer service department; 2) Include the code in your fax order; 3) Place your order on the web and enter the promotional code.
Any feedback that you can provide will be greatly appreciated, whether positive or negative. If you have any further questions, please do not hesitate to contact us. We look forward to receiving your Abreview and wish you luck with your research.
The terms and conditions applicable to this offer can be found here: www.abcam.com/collaborationdiscount.

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Thank you for your response.
I can certainly offer a discount code for testing and this case seems to be stronger since there may be some publication regarding the cross-reactivity with mouse (Western blot application).
Would you be so kind to pass your customer's details so that I can provide the discount as soon as possible?
I look forward to hearing from you soon.

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Thank you for getting back to me. Thank you for confirming that both eIF2B and GSK3 are expressed in these cells. We recommend a positive control of recombinant eIF-2B epsilon treated with GSK 3 beta and lambda phosphatase or CHO-T cells transfected with human insulin receptor (IR) +/- insulin. Unfortunately we do not cell these as lysates or extracts. I hope this information helps. Please do not hesitate to contact me should you require further assistance.

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