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Immunofluorescent analysis of Phospho-4EBP1 pThr37 in HeLa cells using a Phospho-4EBP1 pThr37 recombinant rabbit monoclonal antibody (Product # 700238) at a dilution of 2.5ug/ml in the absence of peptide (top left) and presence of phosphopeptide used as immunogen (top right) or non-phosphopeptide (bottom left), followed by detection using an Alexa Fluor 488-conjugated goat anti-rabbit secondary antibody at a dilution of 1:1000. Actin was stained with Alexa Fluor 568 phalloidin (Product # A12380).
|Tested species reactivity||Human|
|Host / Isotype||Rabbit / IgG|
|Immunogen||A peptide corresponding to amino acids 31-41 of Q13541.|
|Contains||0.09% sodium azide|
|Storage Conditions||Maintain refrigerated at 2-8°C for up to 1 month. For long term storage store at -20°C|
|Tested Applications||Dilution *|
|ELISA (ELISA)||1-5 ug/ml|
|Flow Cytometry (Flow)||1-4µg x 10^6 cells|
|Immunohistochemistry (Paraffin) (IHC (P))||5-6 ug/ml|
|Western Blot (WB)||1-3µg/ml|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
This antibody is predicted to react with bovine, equine, mouse, opossum, rat and zebrafish based on sequence homology.
ABfinity™ recombinant antibodies are rabbit monoclonal antibodies, unmatched for producing superior results. ABfinity™ antibodies are developed by immunizing animals, screening for functionality, cloning the immunogen-specific antibody genes into high-level mammalian expression vectors, produced on a large scale, and purified with Protein A.
ABfinity™ monoclonal antibodies resemble rabbit monoclonals isolated from serum or produced by hybridomas, but demonstrate greater specificity and sensitivity. Because ABfinity™ recombinant antibodies are derived from cloned DNA sequences of the heavy and light antibody chains, they are not susceptible to cell-line drift or lot-to-lot variation, thus allowing for peak specificity and performance.
Intact IgG appears on a non-reducing gel as ~150 kDa band and upon reduction generating a ~25 kDa light chain band and a ~50 kDa heavy chain.
Eukaryotic initiation factor 4E binding protein 1 (4E-BP1), also known as PHAS, is a ~20 kDa member of a family of eIF4E-binding proteins whose binding affinity to eIF4E is regulated by its phosphorylation. It inhibits cap-dependent translation by binding to eIF4E on the same site that overlaps the binding site for eIF4G, preventing its binding to the latter and eventually leading to an increase in mRNA translation. The phosphorylation of 4E-BP1 is critical in determining cell fate by controlling translation initiation and apoptotic potency. 4E-BP1 is hyperphosphorylated in response to several external stimuli including hormones, growth factors, mitogens, cytokines and G-protein–coupled receptors and in response to stress conditions including nutrient deprivation. The phosphorylation of these sites is believed to occur in an orderly fashion where phosphorylation of threonine 37 and 46 by FRAP/mTOR is a priming step for subsequent phosphorylation of 4E-BP1 at the carboxy-terminal sites. Under normoxic conditions, increased VEGF expression, resulting from inhibition of 4E-BP1, contributes to efficient angiogenesis and metastatic brain growth through activated integrin alphav beta3.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
PHAS-I, 4EBP1, 4E-BP1, BP-1
eIF4E-binding protein 1, eukaryotic translation initiation factor 4E-binding protein 1, phosphorylated heat- and acid-stable protein regulated by insulin 1, 4E-BP1, PHAS-I