• Product name
    Anti-Bax antibody [2D2]
    See all Bax primary antibodies
  • Description
    Mouse monoclonal [2D2] to Bax
  • Host species
  • Specificity
    The immunogen amino acid sequence is NOT shared by mouse and rat bax protein.
  • Tested applications
    Suitable for: Flow Cyt, Sandwich ELISA, WB, IHC-P, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Cow, Cat, Dog, Chimpanzee, Macaque monkeyDoes not react with: Mouse, Rat
  • Immunogen

    Synthetic peptide corresponding to Human Bax aa 3-16 (Cysteine residue).


    Database link: Q07812

  • Positive control
    • HeLa cells. Hodgkin’s lymphoma. ICC/IF: A549 cells
  • General notes

    This antibody is BSA and azide free



Our Abpromise guarantee covers the use of ab77566 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
Flow Cyt Use 1µg for 106 cells.

ab170191 - Mouse monoclonal IgG2a, is suitable for use as an isotype control with this antibody.

Sandwich ELISA Use a concentration of 0.2 µg/ml. Can be paired for Sandwich ELISA with Rabbit monoclonal [E63] to Bax (ab32503).
WB Use a concentration of 1 µg/ml. Detects a band of approximately 21 kDa (predicted molecular weight: 21 kDa).
IHC-P Use a concentration of 2 - 4 µg/ml. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.
ICC/IF Use a concentration of 5 µg/ml.


  • Function
    Accelerates programmed cell death by binding to, and antagonizing the apoptosis repressor BCL2 or its adenovirus homolog E1B 19k protein. Under stress conditions, undergoes a conformation change that causes translocation to the mitochondrion membrane, leading to the release of cytochrome c that then triggers apoptosis. Promotes activation of CASP3, and thereby apoptosis.
  • Tissue specificity
    Expressed in a wide variety of tissues. Isoform Psi is found in glial tumors. Isoform Alpha is expressed in spleen, breast, ovary, testis, colon and brain, and at low levels in skin and lung. Isoform Sigma is expressed in spleen, breast, ovary, testis, lung, colon, brain and at low levels in skin. Isoform Alpha and isoform Sigma are expressed in pro-myelocytic leukemia, histiocytic lymphoma, Burkitt's lymphoma, T-cell lymphoma, lymphoblastic leukemia, breast adenocarcinoma, ovary adenocarcinoma, prostate carcinoma, prostate adenocarcinoma, lung carcinoma, epidermoid carcinoma, small cell lung carcinoma and colon adenocarcinoma cell lines.
  • Sequence similarities
    Belongs to the Bcl-2 family.
  • Domain
    Intact BH3 motif is required by BIK, BID, BAK, BAD and BAX for their pro-apoptotic activity and for their interaction with anti-apoptotic members of the Bcl-2 family.
  • Cellular localization
    Cytoplasm and Mitochondrion membrane. Cytoplasm. Colocalizes with 14-3-3 proteins in the cytoplasm. Under stress conditions, undergoes a conformation change that causes release from JNK-phosphorylated 14-3-3 proteins and translocation to the mitochondrion membrane.
  • Information by UniProt
  • Database links
  • Alternative names
    • Apoptosis regulator BAX antibody
    • BAX antibody
    • Bax-protein antibody
    • BAX_HUMAN antibody
    • BAXA antibody
    • Baxdelta2G9 antibody
    • Baxdelta2G9omega antibody
    • Baxdelta2omega antibody
    • Bcl-2-like protein 4 antibody
    • BCL2 associated X protein antibody
    • BCL2 associated X protein omega antibody
    • BCL2 associated X protein transcript variant delta2 antibody
    • Bcl2-L-4 antibody
    • BCL2L4 antibody
    • membrane isoform alpha antibody
    see all


  • ab77566 staining Bax in A549 cells. The cells were fixed with 4% formaldehyde (10 min), permeabilized in 0.1% Triton X-100 for 5 minutes and then blocked in 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated with ab77566 at a working concentration of 5μg/ml and ab202272, Rabbit monoclonal [EP1332Y] to alpha Tubulin (Alexa Fluor® 594, shown in red) at 1/250 overnight at +4°C, followed by a further incubation at room temperature for 1h with an anti-mouse AlexaFluor® 488 (ab150117) at 2 μg/ml (shown in green). Nuclear DNA was labelled in blue with DAPI.
    Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

  • Overlay histogram showing HeLa cells stained with ab77566 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab77566, 1μg/1x106 cells) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-mouse IgG (H&L) (ab150113) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was mouse IgG1 [ICIGG1] (ab91353, 1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter.

  • Immunohistochemical analysis of Human Hodgkin's lymphoma tissue, staining Bax with ab77566 at 4 µg/ml.

  • Anti-Bax antibody [2D2] (ab77566) at 1 µg/ml + HeLa cell lysate

    Predicted band size: 21 kDa

  • Lane 1 = Bax protein (Tagged) (ab85157) ? 10 ng. Lane 2 = Extract of HeLa cells ? 40 ug. Lane 3 = Extract of HepG2 cells ? 40 ug. Lane 4 = Bax protein (Tagged) (ab85157) ? 10 ng. Lane 5 = Extract of HeLa cells ? 40 ug. Lane 6 = Extract of HepG2 cells ? 40 ug. SDS PAGE performed under reducing conditions (100mM DTT ? Sample heated at 50?C). Primary : Lanes 1-3: Anti Bax antibody (ab77566) at 1 ug/mL. Lanes 4-6: Anti Bax antibody (ab32503) at 1:2000 dilution. Secondary : Lanes 1-3: Goat anti mouse IgG(H&L)-HRP at 1:10000. Lanes 4-6: Goat anti rabbit IgG(H&L)-HRP at 1:10000. Development: ECL with 2 min exposure. Blocking: in 5% Milk + PBS for 3 hours at RT. Primary antibody: in 5% Milk + PBS overnight at 4 C. Secondary antibody: in 5% Milk + PBS for 2 hour at RT. Predicted band size : Bax 21kDa and Bax (Tagged) 49 kDa. Observed band size : Bax 21kDa and Bax (Tagged) 49 kDa
  • Standard Curve for Bax (Analyte: ab85157) dilution range 1pg/ml to 1ug/ml using Capture Antibody Mouse monoclonal [2D2] to Bax - BSA and Azide free (ab77566) at 0.2ug/ml and Detector Antibody Rabbit monoclonal [E63] to Bax (ab32503) at 0.5ug/ml Concentration of ab32503 may vary from lot to lot; please use this curve as guideline.


This product has been referenced in:
  • Qin S  et al. miR-21-5p regulates type II alveolar epithelial cell apoptosis in hyperoxic acute lung injury. Mol Med Rep 17:5796-5804 (2018). Read more (PubMed: 29436647) »
  • Yan W  et al. Fisetin inhibits the proliferation of gastric cancer cells and induces apoptosis through suppression of ERK 1/2 activation. Oncol Lett 15:8442-8446 (2018). Read more (PubMed: 29805580) »

See all 12 Publications for this product

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