• Product name
  • Description
    Rabbit polyclonal to eIF3B
  • Host species
  • Tested applications
    Suitable for: WB, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Mouse, Rat, Cow, Drosophila melanogaster
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 150 - 250 of Human eIF3B.

    Read Abcam's proprietary immunogen policy (Peptide available as ab41603.)

  • Positive control
    • This antibody gave a positive signal in the following whole cell lysates; HEK293, HepG2, SHSY-5Y and U2OS. IF/ICC: HeLa cell line.


  • Form
  • Storage instructions
    Shipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
  • Storage buffer
    Preservative: 0.02% Sodium Azide
    Constituents: 1% BSA, PBS, pH 7.4
  • Concentration information loading...
  • Purity
    Immunogen affinity purified
  • Clonality
  • Isotype
  • Research areas


Our Abpromise guarantee covers the use of ab40799 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 1 µg/ml. Detects a band of approximately 110 kDa (predicted molecular weight: 92 kDa).
ICC/IF Use a concentration of 5 µg/ml.


  • Function
    Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is required for several steps in the initiation of protein synthesis. The eIF-3 complex associates with the 40S ribosome and facilitates the recruitment of eIF-1, eIF-1A, eIF-2:GTP:methionyl-tRNAi and eIF-5 to form the 43S preinitiation complex (43S PIC). The eIF-3 complex stimulates mRNA recruitment to the 43S PIC and scanning of the mRNA for AUG recognition. The eIF-3 complex is also required for disassembly and recycling of post-termination ribosomal complexes and subsequently prevents premature joining of the 40S and 60S ribosomal subunits prior to initiation.
  • Sequence similarities
    Belongs to the eIF-3 subunit B family.
    Contains 1 RRM (RNA recognition motif) domain.
    Contains 5 WD repeats.
  • Domain
    The RRM domain mediates interaction with EIF3J.
  • Post-translational
    Phosphorylated. Phosphorylation is enhanced upon serum stimulation.
  • Cellular localization
  • Information by UniProt
  • Database links
  • Alternative names
    • eIF-3-eta antibody
    • eIF3 eta antibody
    • eIF3 p110 antibody
    • eIF3 p116 antibody
    • EIF3-ETA antibody
    • EIF3-P110 antibody
    • EIF3-P116 antibody
    • eIF3b antibody
    • EIF3B_HUMAN antibody
    • EIF3S9 antibody
    • EIF3S9, formerly antibody
    • Eukaryotic translation initiation factor 3, subunit B antibody
    • Eukaryotic translation initiation factor 3 subunit 9 antibody
    • eukaryotic translation initiation factor 3 subunit 9 eta antibody
    • Eukaryotic translation initiation factor 3 subunit B antibody
    • eukaryotic translation initiation factor 3, subunit 9 (eta, 116kD) antibody
    • eukaryotic translation initiation factor 3, subunit 9 eta, 116kDa antibody
    • eukaryotic translation initiation factor 3, subunit 9, formerly antibody
    • hPrt1 antibody
    • Protein synthesis defective at 36 degrees celsius 1, S. cerevisiae, homolog of antibody
    • PRT1 antibody
    • Prt1 homolog antibody
    see all


  • ICC/IF image of ab40799 stained MCF7 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 (ab40799, 5µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899, DyLight® 488 goat anti-rabbit IgG (H+L) used at a 1/250 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.

  • All lanes : Anti-eIF3B antibody (ab40799) at 1 µg/ml

    Lane 1 : HEK293 (Human embryonic kidney cell line) Whole Cell Lysate
    Lane 2 : HepG2 (Human hepatocellular liver carcinoma cell line) Whole Cell Lysate
    Lane 3 : SHSY-5Y (Human neuroblastoma cell line) Whole Cell Lysate
    Lane 4 : U2OS (Human osteosarcoma cell line) Whole Cell Lysate

    Lysates/proteins at 10 µg per lane.

    All lanes : IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size: 92 kDa
    Observed band size: 110 kDa
    why is the actual band size different from the predicted?

    This antibody was raised against an immunogen that is predicted to cross react with both isoforms 1 and 2 of eIF3B. We believe that the band observed is isoform 2 due to its higher molecular weight of 110 kDa. Predicted molecular weights of the isoforms are 92 kDa and 99 kDa respectively.


This product has been referenced in:
  • Wang L & Ouyang L Effects of EIF3B gene downregulation on apoptosis and proliferation of human ovarian cancer SKOV3 and HO-8910 cells. Biomed Pharmacother 109:831-837 (2019). Read more (PubMed: 30551537) »
  • Fathinajafabadi A  et al. CERKL, a retinal disease gene, encodes an mRNA-binding protein that localizes in compact and untranslated mRNPs associated with microtubules. PLoS One 9:e87898 (2014). WB ; Human . Read more (PubMed: 24498393) »
See all 2 Publications for this product

Customer reviews and Q&As


Vielen Dank für Ihre Antwort. Hier ist eine Liste mit den Homologien der Immunogene zu Kaninchen der folgenden Antikörper: eIF3B ABCF1=ABC50 ab40799 100% ab89109 92% ab113218 45% ab99939 97% ab41605 94% ab86223 90% ab50709 90% ab50976 97% All diese Antikörper sind für WB bereits getestet. Ich kann Ihnen auch hier wieder unser Test-Programm anbieten Für alle Antikörper außer ab113218. Bitte lassen Sie mich wissen, ob Sie dieses Angebot annehmen möchten und wenn ja, mit welchen Antikörpern. Desweitern habe ich Ihnen den Rabattcode für das Testen von ab118357 ausgestellt: DISCOUNT CODE: XXXXXX Ablaufdatum: 23. 03.2012 Es freut mich zu hören, dass Sie unser Angebot unseren Antikörper ab118357 in Kaninchen zu testen, annehmen möchten. Wie am Telefon besprochen, können Sie den Gutscheincode zum Kauf eines weiteren Antikörpers einsetzen, sobald Sie uns ein Abreview für diesen Antikörper eingereicht haben. Der Discountcode hat die Nummer 100%ABR-E7TU6, deckt den Wert von ab118357 ab und kann zum Kauf weiterer Produkte eingesetzt werden. Der Code wird gültig, sobald Sie uns ein Abreview für diesen Antikörper über den Test in Kaninchen eingereicht haben. Bitte geben Sie diesen Code auch im Abschnitt “Additional Notes” des Abreviews mit an, so dass wir wissen, dass sich dieses Abreview auf die Gutscheinaktion bezieht. Der Code wird dadurch aktiviert. Bitte kontaktieren Sie bei der nächsten Bestellung unsere Kundendienst mit dem Code und der ursprünglichen Bestellnummer. Bitte zögern Sie nicht, sich wieder an uns zu wenden, falls Sie weitere Fragen haben. Wir freuen uns auf Ihr Abreview, egal ob Ihre Ergebnisse positiv oder negativ sind und wünschen Ihnen viel Glück für Ihre Forschung. Die Bedingungen dieses Angebotes befinden sich unter dem folgenden Link: www.abcam.com/collaborationdiscount

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