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AB289886

Anti-Brd4 antibody [EPR25425-23]

  • BOND RX™ Validated
  • RabMAb
  • Recombinant
  • KO Validated
  • Lab Essentials
  • 20ul selling size
  • What is this?

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Rabbit Recombinant Monoclonal BRD4 antibody. Suitable for ICC/IF, IHC-P, Flow Cyt (Intra), WB and reacts with Mouse, Human, Rat samples.

View Alternative Names

HUNK1, BRD4, Bromodomain-containing protein 4, Protein HUNK1

10 Images
Flow Cytometry (Intracellular) - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • Flow Cyt (Intra)

Lab

Flow Cytometry (Intracellular) - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Flow cytometric analysis of 4% paraformaldehyde fixed, 90% methanol permeabilized HeLa (Human cervix adenocarcinoma epithelial cell) cells labelling Brd4 with ab289886 at 1/500 dilution (0.1μg) (Red) compared with a Rabbit monoclonal IgG (ab172730) (Black) isotype control and an unlabelled control (cells without incubation with primary antibody and secondary antibody) (Blue). A Goat Anti-Rabbit IgG (Alexa Fluor® 488, ab150081) at 1/2000 dilution was used as the secondary antibody.

Immunocytochemistry/ Immunofluorescence - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • ICC/IF

Lab

Immunocytochemistry/ Immunofluorescence - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Immunofluorescent analysis of 4% Paraformaldehyde-fixed, 0.1% Triton X-100 permeabilized HeLa cells labeling Brd4 with ab289886 at 1/50 dilution, followed by ab150081 Goat Anti-Rbit IgG H&L (Alexa Fluo 488) preadsorbed antibody at 1/1000 dilution (Green). Confocal image showing nuclear staining in HeLa cell line. ab195889 Anti-alpha Tubulin mouse monoclonal antibody - Microtubule Marker (Alexa Fluor® 594) was used to counterstain tubulin at 1/200 dilution (Red). The Nuclear counterstain was DAPI (Blue).

Secondary antibody only control : Secondary antibody is ab150081 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed at 1/1000 dilution.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • IHC-P

Lab

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Immunohistochemical analysis of paraffin-embedded Rat testis tissue labelling Brd4 with ab289886 at 1/2000 followed by a ready to use Rabbit specific IHC polymer detection kit HRP/DAB (ab209101). Nucleus staining was found in rat testis. The section was incubated with ab289886 for 30 mins at room temperature. The immunostaining was performed on a Leica Biosystems BOND® RX instrument. Counterstained with Hematoxylin.

Secondary antibody only control : Secondary antibody is a ready to use Rabbit specific IHC polymer detection kit HRP/DAB (ab209101).

Heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0, epitope retrieval solution2) for 20 mins.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • IHC-P

Lab

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Immunohistochemical analysis of paraffin-embedded Mouse testis tissue labelling Brd4 with ab289886 at 1/2000 followed by a ready to use Rabbit specific IHC polymer detection kit HRP/DAB (ab209101). Nuclear staining was found in mouse testis (PMID : 28076398). The section was incubated with ab289886 for 30 mins at room temperature. The immunostaining was performed on a Leica Biosystems BON RX instrument. Counterstained with Hematoxylin.

Secondary antibody only control : Secondary antibody is a ready to use Rabbit specific IHC polymer detection kit HRP/DAB (ab209101).

Heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0, epitope retrieval solution2) for 20 mins.

Flow Cytometry (Intracellular) - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • Flow Cyt (Intra)

Lab

Flow Cytometry (Intracellular) - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Flow cytometric analysis of 4% paraformaldehyde fixed, 90% methanol permeabilized NIH/3T3 (Mouse embryonic fibroblast) cells labelling Brd4 with ab289886 at 1/500 dilution (0.1μg) (Red) compared with a Rabbit monoclonal IgG (ab172730) (Black) isotype control and an unlabelled control (cells without incubation with primary antibody and secondary antibody) (Blue). A Goat Anti-Rabbit IgG (Alexa Fluor® 488, ab150081) at 1/2000 dilution was used as the secondary antibody.

Immunocytochemistry/ Immunofluorescence - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • ICC/IF

Lab

Immunocytochemistry/ Immunofluorescence - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Immunofluorescent analysis of 4% Paraformaldehyde-fixed, 0.1% TritonX-100 permeabilized NIH/3T3 cells labeling Brd4 with ab289886 at 1/50 dilution, followed by ab150081 Goat Anti-Rbit IgG H&L (Alexa Fluor® 488) preadsorbed antibody at 1/1000 dilution (Green). Confocal image showing nuclear staining in NIH/3T3 cell line. ab195889 Anti-alpha Tubulin mouse monoclonal antibody - Microtubμle Marker (Alexa Fluor® 594) was used to counterstain tubulin at 1/200 dilution (Red). The Nuclear counterstain was DAPI (Blue).

Secondary antibody only control : Secondary antibody is ab150081 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed at 1/1000 dilution.

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • WB

Supplier Data

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Blocking and diluting buffer and concentration : 5% NFDM/TBST In Western blot, Anti-GAPDH antibody [EPR16891] - Loading Control (ab181602) staining at 1/200000 dilution. In Western blot, Anti-Brd4L antibody [EPR25425-23] (ab289886) staining at 1/1000 dilution.

All lanes:

Western blot - Anti-pan Brd4 antibody [EPR25424-71] (<a href='/en-us/products/primary-antibodies/pan-brd4-antibody-epr25424-71-ab314432'>ab314432</a>) at 1/1000 dilution

Lane 1:

293T (human embryonic kidney epithelial cell) transfected with scrambled siRNA control whole cell lysate at 20 µg

Lane 2:

293T transfected with siRNA specifically targeti Brd4 whole cell lysate at 20 µg

Secondary

All lanes:

Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution

Observed band size: 110 kDa,200 kDa

false

Exposure time: 180s

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • WB

Lab

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Blocking and diluting buffer and concentration : 5% NFDM/TBST.

Lysates were prepared from fresh material and used for Western blotting immediately to minimize protein degradation.

Exposure time : 48 seconds.

All lanes:

Western blot - Anti-Brd4 antibody [EPR25425-23] (ab289886) at 1/1000 dilution

Lane 1:

HeLa (human cervix adenocarcinoma epithelial cell) whole cell lysate at 20 µg

Lane 2:

293T (human embryonic kidney epithelial cell) whole cell lysate at 20 µg

Lane 3:

NIH/3T3 (mouse embryonic fibroblast) whole cell lysate at 20 µg

Lane 4:

PC-12 (rat adrenal gland pheochromocytoma) whole cell lysate at 20 µg

Secondary

All lanes:

Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution

Predicted band size: 152 kDa

Observed band size: 200 kDa

false

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • WB

Lab

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Western blot : Rabbit Monoclonal [EPR25425-23] to Brd4 ab289886 staining at 1/1000 dilution, shown in green; Mouse anti alpha Tubulin (ab7291) loading control staining at 1/20,000 dilution, shown in magenta. A band was observed at 200 kDa. To generate this image, samples were run on an SDS-PAGE gel then transferred onto a nitrocellulose membrane. Membranes were blocked in 3pc Milk in TBS-0.1 % Tween® 20 (TBS-T) before incubation with primary antibodies overnight at 4 °C. Blots were washed four times in TBS-T, incubated with secondary antibodies for 1 h at room temperature, washed again four times then imaged. Secondary antibodies used were Goat anti-Rabbit 800CW & Goat anti-Mouse 680RD at 1/20,000 dilution.

All lanes:

Western blot - Anti-Brd4 antibody [EPR25425-23] (ab289886) at 1/1000 dilution

Lane 1:

Wild-type HAP1 (whole lysate) at 20 µg

Lane 2:

Wild-type HAP1 (Nuclear fraction) at 20 µg

Lane 3:

Wild-type HAP1 (Membrane fraction) at 20 µg

Lane 4:

HEK-293T (Whole lysate) at 20 µg

Lane 5:

HeLa (Whole lysate) at 20 µg

Lane 6:

HeLa (Nuclear fraction) at 20 µg

Lane 7:

HeLa (Membrane fraction) at 20 µg

Secondary

Lanes 1 - 5:

Goat anti-Rabbit 800CW at 1/20000 dilution

Lanes 1 - 5:

Goat anti-Mouse 680RD at 1/20000 dilution

Predicted band size: 200 kDa

Observed band size: 200 kDa,50 kDa

false

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)
  • WB

Lab

Western blot - Anti-Brd4 antibody [EPR25425-23] (AB289886)

Blocking and diluting buffer and concentration : 5% NFDM/TBST.

This blot was developed using a higher sensitivity ECL substrate.

Exposure time : 180 seconds

All lanes:

Western blot - Anti-Brd4 antibody [EPR25425-23] (ab289886) at 1/1000 dilution

Lane 1:

Mouse testis tissue lysate at 20 µg

Lane 2:

Rat testis tissue lysate at 20 µg

Secondary

All lanes:

Goat Anti-Rabbit IgG, (H+L), Peroxidase conjugated (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/100000 dilution

Predicted band size: 152 kDa

Observed band size: 200 kDa

false

  • Carrier free

    Anti-Brd4 antibody [EPR25425-23] - BSA and Azide free

Key facts

Host species

Rabbit

Clonality

Monoclonal

Clone number

EPR25425-23

Isotype

IgG

Carrier free

No

Reacts with

Mouse, Rat, Human

Applications

WB, IHC-P, ICC/IF, Flow Cyt (Intra)

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

Specificity

This antibody does not react with Human species for IHC.

Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"}, "IP" : {"fullname" : "Immunoprecipitation", "shortname":"IP"}, "ChIP" : {"fullname" : "ChIP", "shortname":"ChIP"}, "IHCP" : {"fullname" : "Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)", "shortname":"IHC-P"}, "FlowCytIntra" : {"fullname" : "Flow Cytometry (Intracellular)", "shortname":"Flow Cyt (Intra)"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "1/50", "ICCIF-species-notes": "<p></p>", "IP-species-checked": "notRecommended", "IP-species-dilution-info": "", "IP-species-notes": "<p></p>", "ChIP-species-checked": "notRecommended", "ChIP-species-dilution-info": "", "ChIP-species-notes": "<p></p>", "IHCP-species-checked": "notRecommended", "IHCP-species-dilution-info": "1/2000", "IHCP-species-notes": "<p></p>", "FlowCytIntra-species-checked": "testedAndGuaranteed", "FlowCytIntra-species-dilution-info": "1/500", "FlowCytIntra-species-notes": "<p></p>", "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/1000", "WB-species-notes": "<p></p>" }, "Mouse": { "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "1/50", "ICCIF-species-notes": "<p></p>", "IP-species-checked": "notRecommended", "IP-species-dilution-info": "", "IP-species-notes": "<p></p>", "ChIP-species-checked": "notRecommended", "ChIP-species-dilution-info": "", "ChIP-species-notes": "", "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "1/2000", "IHCP-species-notes": "<p></p>", "FlowCytIntra-species-checked": "testedAndGuaranteed", "FlowCytIntra-species-dilution-info": "1/500", "FlowCytIntra-species-notes": "<p></p>", "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/1000", "WB-species-notes": "<p></p>" }, "Rat": { "ICCIF-species-checked": "guaranteed", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IP-species-checked": "notRecommended", "IP-species-dilution-info": "", "IP-species-notes": "", "ChIP-species-checked": "notRecommended", "ChIP-species-dilution-info": "", "ChIP-species-notes": "", "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "1/2000", "IHCP-species-notes": "<p></p>", "FlowCytIntra-species-checked": "guaranteed", "FlowCytIntra-species-dilution-info": "", "FlowCytIntra-species-notes": "", "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/1000", "WB-species-notes": "<p></p>" } } }

Product details

Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Properties and storage information

Form
Liquid
Purification technique
Affinity purification Protein A
Storage buffer
pH: 7.2 - 7.4 Preservative: 0.01% Sodium azide Constituents: PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA
Shipped at conditions
Blue Ice
Appropriate short-term storage duration
1-2 weeks
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
-20°C
Aliquoting information
Upon delivery aliquot
Storage information
Avoid freeze / thaw cycle

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

The Brd4 protein also known as Bromodomain containing protein 4 plays an important role as a transcriptional regulator. It recognizes acetylated lysine residues on histone tails through its bromodomains. This binding impacts chromatin structure and transcriptional activation. The Brd4 protein has a molecular weight of around 150 kDa and is often used as a marker in studies using Brd4 western blot techniques. It mainly expresses in the nucleus of most cell types and is an important focus for developing Brd4 anticuerpos useful for detecting protein size discrepancies in research.
Biological function summary

Brd4 plays a significant role in regulating gene expression during cell cycle progression. It interacts with the Mediator complex enabling communication between transcriptional activators and RNA polymerase II. This protein is integral for maintaining chromatin in an active state ensuring accessibility for transcription machinery. Moreover Brd4 size and functionality relate to the elongation of transcription by RNA polymerase II ensuring the seamless expression of genes essential for cellular functions.

Pathways

Brd4 integrates into transcriptional and epigenetic regulation pathways. It acts in the positive regulation of the MYC pathway directly linking Brd4 with proto-oncogene c-Myc. Also Brd4 engages in the JAK/STAT signaling pathway where its activity affects cell growth and immune response. These interactions establish Brd4 as a central regulator within these pathways facilitating communication and coordination among molecular players.

Brd4 link heavily to cancer and inflammatory diseases. Aberrant Brd4 activity often associates with various cancers including leukemia where its regulation impacts oncogenic drivers. Clinically targeting Brd4 presents a therapeutic avenue as its inhibition affects cyclin-dependent kinase 9 (CDK9) an important regulator of the cell cycle. Similarly Brd4 alterations implicate in inflammatory disorders impacting nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) signaling revealing pathways for intervening in pathogenic processes.

Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Target data

Chromatin reader protein that recognizes and binds acetylated histones and plays a key role in transmission of epigenetic memory across cell divisions and transcription regulation (PubMed : 20871596, PubMed : 23086925, PubMed : 23317504, PubMed : 29176719, PubMed : 29379197). Remains associated with acetylated chromatin throughout the entire cell cycle and provides epigenetic memory for postmitotic G1 gene transcription by preserving acetylated chromatin status and maintaining high-order chromatin structure (PubMed : 22334664, PubMed : 23317504, PubMed : 23589332). During interphase, plays a key role in regulating the transcription of signal-inducible genes by associating with the P-TEFb complex and recruiting it to promoters (PubMed : 16109376, PubMed : 16109377, PubMed : 19596240, PubMed : 23589332, PubMed : 24360279). Also recruits P-TEFb complex to distal enhancers, so called anti-pause enhancers in collaboration with JMJD6 (PubMed : 16109376, PubMed : 16109377, PubMed : 19596240, PubMed : 23589332, PubMed : 24360279). BRD4 and JMJD6 are required to form the transcriptionally active P-TEFb complex by displacing negative regulators such as HEXIM1 and 7SKsnRNA complex from P-TEFb, thereby transforming it into an active form that can then phosphorylate the C-terminal domain (CTD) of RNA polymerase II (PubMed : 16109376, PubMed : 16109377, PubMed : 19596240, PubMed : 23589332, PubMed : 24360279). Regulates differentiation of naive CD4(+) T-cells into T-helper Th17 by promoting recruitment of P-TEFb to promoters (By similarity). Promotes phosphorylation of 'Ser-2' of the C-terminal domain (CTD) of RNA polymerase II (PubMed : 23086925). According to a report, directly acts as an atypical protein kinase and mediates phosphorylation of 'Ser-2' of the C-terminal domain (CTD) of RNA polymerase II; these data however need additional evidences in vivo (PubMed : 22509028). In addition to acetylated histones, also recognizes and binds acetylated RELA, leading to further recruitment of the P-TEFb complex and subsequent activation of NF-kappa-B (PubMed : 19103749). Also acts as a regulator of p53/TP53-mediated transcription : following phosphorylation by CK2, recruited to p53/TP53 specific target promoters (PubMed : 23317504).. Isoform B. Acts as a chromatin insulator in the DNA damage response pathway. Inhibits DNA damage response signaling by recruiting the condensin-2 complex to acetylated histones, leading to chromatin structure remodeling, insulating the region from DNA damage response by limiting spreading of histone H2AX/H2A.x phosphorylation.
See full target information BRD4

Product promise

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