Revision 4

#62834Store at -20C

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IP, IHC-Bond, IHC-P, FC-FP

REACTIVITY:

H M

SENSITIVITY:

Endogenous

MW (kDa):

51

Source/Isotype:

Rabbit IgG

UniProt ID:

#Q15306

Entrez-Gene Id:

3662

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:100
IHC Leica Bond 1:50 - 1:200
Immunohistochemistry (Paraffin) 1:50 - 1:200
Flow Cytometry (Fixed/Permeabilized) 1:200 - 1:800

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #56471.

Specificity / Sensitivity

IRF-4 (E8H3S) XP® Rabbit mAb recognizes endogenous levels of total IRF-4 protein.

Species Reactivity:

Human, Mouse

Source / Purification

Monoclonal antibody is produced by immunizing animals with recombinant protein specific to full-length human IRF-4 protein.

Background

Interferon regulatory factors (IRFs) comprise a family of transcription factors that function within the Jak/Stat pathway to regulate interferon (IFN) and IFN-inducible gene expression in response to viral infection (1). IRFs play an important role in pathogen defense, autoimmunity, lymphocyte development, cell growth, and susceptibility to transformation. The IRF family includes nine members: IRF-1, IRF-2, IRF-9/ISGF3γ, IRF-3, IRF-4 (Pip/LSIRF/ICSAT), IRF-5, IRF-6, IRF-7, and IRF-8/ICSBP. All IRF proteins share homology in their amino-terminal DNA-binding domains. IRF family members regulate transcription through interactions with proteins that share similar DNA-binding motifs, such as IFN-stimulated response elements (ISRE), IFN consensus sequences (ICS), and IFN regulatory elements (IRF-E) (2).

IRF-4 was independently cloned by three groups and demonstrated to have roles in different contexts of lymphoid regulation (3-5). First, IRF-4 (Pip) was found to associate with PU.1, a hematopoietic specific member of the ETS family, and to regulate the expression of B-cell specific genes (3). Second, it was characterized as a lymphoid-specific member of the IRF family (LSIRF) able to bind to ISRE (4). Third, it was identified in activated T cells as a factor that binds to the promoter of the interleukin-5 gene (ICSAT), and it was shown to repress gene activation induced by IFN (5). IRF-4 is expressed in all stages of B cell development and in mature T cells, and is inducible in primary lymphocytes by antigen mimetic stimuli such as concavalin A, CD3 crosslinking, anti-IgM and PMA treatment (4,5). Mice deficient in IRF-4 show normal distribution of B and T lymphocytes at 4 to 5 weeks, but later develop progressive generalized lymphadenopathy, suggesting a role for IRF-4 in the function and homeostasis of mature B- and T-lymphocytes (6).

  1. Taniguchi, T. et al. (2001) Annu Rev Immunol 19, 623-55.
  2. Honda, K. and Taniguchi, T. (2006) Nat Rev Immunol 6, 644-58.
  3. Eisenbeis, C.F. et al. (1995) Genes Dev 9, 1377-87.
  4. Matsuyama, T. et al. (1995) Nucleic Acids Res 23, 2127-36.
  5. Yamagata, T. et al. (1996) Mol Cell Biol 16, 1283-94.
  6. Mittrücker, H.W. et al. (1997) Science 275, 540-3.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting IP: Immunoprecipitation IHC-Bond: IHC Leica Bond IHC-P: Immunohistochemistry (Paraffin) FC-FP: Flow Cytometry (Fixed/Permeabilized)

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
Alexa Fluor is a registered trademark of Life Technologies Corporation.
KARPAS cell line source: Dr. Abraham Karpas at the University of Cambridge.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

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Revision 4
#62834

IRF-4 (E8H3S) XP® Rabbit mAb

Western Blotting Image 1: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Western blot analysis of extracts from various cell lines using IRF-4 (E8H3S) XP® Rabbit mAb (upper) and β-Actin

(D6A8) Rabbit mAb #8457 (lower). As expected, IRF-4 protein is not expressed in Jurkat cells. KARPAS-299 cell line source: Dr. Abraham Karpas at the University of Cambridge.

Western Blotting Image 2: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Western blot analysis of extracts from various cell lines using IRF-4 (E8H3S) XP® Rabbit mAb (upper) and β-Actin

(D6A8) Rabbit mAb #8457 (lower). As expected, IRF-4 protein is not expressed in NIH/3T3 cells.

Western Blotting Image 3: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Western blot analysis of extracts from human primary CD4+ T cells using IRF-4 (E8H3S) XP® Rabbit mAb (upper) and β-Actin (D6A8) Rabbit mAb #8457 (lower). CD4+ T cells were purified from human PBMCs and either left untreated (-) or treated for 3 days using beads coated with CD3 and CD28 antibodies (+). As expected, T cell activation induces an upregulation of IRF-4 protein.
Western Blotting Image 4: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Western blot analysis of extracts from 293T cells, mock transfected (-) or transfected with a construct expressing Myc/DDK-tagged full-length human IRF-4 protein (hIRF-4-Myc/DDK; +), using IRF-4 (E8H3S) XP® Rabbit mAb (upper), DYKDDDDK Tag Antibody (Binds to same epitope as Sigma's Anti-FLAG® M2 Antibody) #2368 (middle), and β-Actin (D6A8) Rabbit mAb #8457 (lower).
Immunoprecipitation Image 1: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunoprecipitation of IRF-4 from Ramos cell extracts. Lane 1 is 10% input, lane 2 is Rabbit (DA1E) mAb IgG XP® Isotype Control #3900, and lane 3 is IRF-4 (E8H3S) XP® Rabbit mAb. Western blot analysis was performed using IRF-4 (E8H3S) XP® Rabbit mAb. Mouse Anti-rabbit IgG (Conformation Specific) (L27A9) mAb (HRP conjugate) #5127 was used as the secondary

antibody to avoid cross-reactivity with IgG.

Immunohistochemistry Image 1: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human squamous cell lung carcinoma using IRF-4 (E8H3S) XP® Rabbit mAb performed on the Leica® BOND Rx. 
Immunohistochemistry Image 2: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human T-cell lymphoma using IRF-4 (E8H3S) XP® Rabbit mAb performed on the Leica® BOND Rx. 
Immunohistochemistry Image 1: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human non-small cell lung carcinoma using IRF-4 (E8H3S) XP® Rabbit mAb.
Immunohistochemistry Image 2: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded normal human colon using IRF-4 (E8H3S) XP® Rabbit mAb.
Immunohistochemistry Image 3: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human lung adenocarcinoma using IRF-4 (E8H3S) XP® Rabbit mAb (left) compared to concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (right).
Immunohistochemistry Image 4: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded 4T1 metastatic tumor in mouse lung using IRF-4 (E8H3S) XP® Rabbit mAb.
Immunohistochemistry Image 5: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded mouse small intestine using IRF-4 (E8H3S) XP® Rabbit mAb.
Immunohistochemistry Image 6: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded Ramos cell pellet (left, positive) or Jurkat cell pellet (right, negative) using IRF-4 (E8H3S) XP® Rabbit mAb.
Immunohistochemistry Image 7: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human tonsil using IRF-4 (E8H3S) XP® Rabbit mAb.
Flow Cytometry Image 1: IRF-4 (E8H3S) XP® Rabbit mAb Expand Image
Flow cytometric analysis of Jurkat cells (blue, negative) and Ramos cells (green, positive) using IRF-4 (E8H3S) XP® Rabbit mAb (solid lines) or a concentration-matched Rabbit (DA1E) mAb IgG XP® Isotype Control #3900 (dashed lines). Anti-rabbit IgG (H+L), F(ab')2 Fragment (Alexa Fluor® 488 Conjugate) #4412 was used as a secondary antibody.