Human Phospho-eIF4B (S422) Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human eIF4B when phosphorylated at S422
  • Source
    Monoclonal Rat IgG2A Clone # 866049
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Phosphopeptide containing the human eIF4B S422 site
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Detection of Human Phospho-eIF4B (S422) by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line untreated (-) or treated (+) with 200 nM PMA for 20 minutes or 100 ng/mL Recombinant Human EGF (Catalog # 236-EG) for 5 minutes. PVDF membrane was probed with 1 µg/mL of Rat Anti-Human Phospho-eIF4B (S422) Monoclonal Antibody (Catalog # MAB3800) followed by HRP-conjugated Anti-Rat IgG Secondary Antibody (Catalog # HAF005). A specific band was detected for Phospho-eIF4B (S422) at approximately 93 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.5 mg/mL.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: eIF4B

eIF4B (eukaryotic translation initiation factor 4B), an RNA binding protein, is essential for the binding of mRNA to the 43S pre-initiation complex, which consists of the 40S ribosomal subunit bound to a ternary complex of eIF2, GTP, and Met-tRNA stabilized by eIF3. An arginine rich motif (ARM) in the carboxy-terminus of eIF4B binds RNA non-specifically, while a canonical RNA motif (RMM) near the amino terminus binds specifically to 18S rRNA. The simultaneous binding of specific and nonspecific RNA may serve to facilitate the binding of the 40S subunit to the mRNA by serving as a bridge between the 18S rRNA and the mRNA. Besides its binding activity, eIF4B in conjunction with the heterotrimeric eIF4F, stimulates the ATPase and RNA helicase activity of eIF4E.

  • Long Name:
    Eukaryotic Translation Initiation Factor 4B
  • Entrez Gene IDs:
    1975 (Human); 75705 (Mouse); 300253 (Rat)
  • Alternate Names:
    Eif4a2; eIF4B; EIF-4B; eukaryotic translation initiation factor 4B; PRO1843
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Rat IgG2A Isotype Control

Ctrl MAB006 90  
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Normal Rat IgG Control

Ctrl 6-001-A 9
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Normal Rat IgG Control (Azide Free)

Ctrl 6-001-F 1
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Rat IgG2A Isotype Control

Ctrl MAB006R  
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Secondary Antibodies
Description Application Cat# Citations Images  

Rat IgG HRP-conjugated Antibody

WB, Simple Western HAF005 7  
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Goat Anti-Rat F(ab)2 IgG (H+L)
APC-conjugated Antibody

Flow F0113 2  
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Goat Anti-Rat IgG NorthernLights™ NL557-conjugated Antibody

Flow, IHC, ICC NL013 2
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Rat F(ab)2 IgG (H+L) PE-conjugated Antibody

Flow F0105B 2  
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Goat Anti-Rat IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL015 1
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Goat Anti-Rat IgG Biotinylated Antibody

WB BAF005 2
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Goat Anti-Rat IgG Antibody

WB AF005 1
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Rat IgG VisUCyte HRP Polymer Antibody

IHC VC005  
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Rat F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0104B  
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Goat Anti-Rat IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL014
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Goat Anti-Rat F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0115 1
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