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  • KD/KO Validated

BAX Polyclonal antibody

BAX Polyclonal Antibody for WB, IP, IHC, ELISA, FC (Intra)

Host / Isotype

Rabbit / IgG


human, mouse, rat and More (7)


WB, IP, IHC, CoIP, chIP, ELISA, FC (Intra)



Cat no : 50599-2-Ig


Apoptosis regulator BAX, BAX

Tested Applications

Positive WB detected inHEK-293 cells, COLO 320 cells, HeLa cells, HT-1080 cells, PC-12 cells, NIH/3T3 cells, Raji cells, mouse kidney tissue, rat kidney tissue, rat colon tissue, rat lung tissue, RAW 264.7 cells, mouse heart tissue, rat brain tissue
Positive IP detected inRaji cells, mouse heart tissue
Positive IHC detected inmouse lung tissue, mouse kidney tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive FC detected inRamos cells

Recommended dilution

Western Blot (WB)WB : 1:2000-1:16000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for 1.0-3.0 mg of total protein lysate
Immunohistochemistry (IHC)IHC : 1:1000-1:4000
Flow Cytometry (FC)FC : 0.40 ug per 10^6 cells in a 100 µl suspension
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

50599-2-Ig targets BAX in WB, IP, IHC, CoIP, chIP, ELISA, FC (Intra) applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat, goat, chicken, sheep, rabbit, zebrafish, hamster, pig
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen BAX fusion protein Ag0576
Full Name BCL2-associated X protein
Calculated Molecular Weight 21 kDa
Observed Molecular Weight 21 kDa
GenBank Accession NumberBC014175
Gene Symbol BAX
Gene ID (NCBI) 581
Conjugate Unconjugated
Form Liquid
Purification MethodProtein A purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

BAX (also known as BCL2 Associated X, Bcl-2-Like Protein 4, Bcl2-L-4, BCL2L4) is a member of the BCL2 family of proteins that play a key role in the regulation of apoptosis in higher eukaryotes (https://www.uniprot.org/uniprot/Q07812). BAX comprises 4 Bcl-2 homology domains (BH1-BH4) and a C-terminal transmembrane domain. In healthy mammalian cells, BAX is localized to the cytoplasm through its interaction with the anti-apoptotic BL-2 family members BCL2L1/Bcl-xL (PMIDs: 28755482, 21458670). In response to apoptotic stimuli, however, BAX undergoes a conformational change that causes it to translocate to the outer mitochondrial membrane where it initiates the mitochondrial pathway of apoptosis via two potential mechanisms. Firstly, upon translocation to the outer mitochondrial membrane, BAX interacts with the mitochondrial voltage-dependent anion channel (VDAC) leading to the opening of the channel, loss of membrane potential, and the release of cytochrome c from the mitochondrion (PMID:10766872). The release of cytochrome C into the cytoplasm leads to the activation of Caspase3, initiating apoptosis. Secondly, activated BAX forms homodimers, which then assemble into oligomers on the mitochondrial outer membrane to create pores that permeabilize the mitochondrion leading to the release of cytochrome C (PMID:25458844).

BAX has been shown to be involved in p53-mediated apoptosis. Expression of the human bax gene has been shown to be directly regulated by p53, and the bax promoter contains four motifs with homology to consensus p53-binding sites (PMID:7834749). Furthermore, p53 directly interacts with BAX to promote its activation (PMID:14963330).

What is the molecular weight of BAX?

BAX is a 192 amino acid protein that has a predicted molecular weight of 21.1 kDa.

What is the subcellular localization of BAX?

In healthy mammalian cells, BAX is localized to the cytoplasm. In response to apoptotic stimuli, BAX translocates to the outer mitochondrial membrane.

 What is the tissue specificity of BAX?

BAX is ubiquitously expressed (PMID: 25613900).

What is the connection between BAX and cancer?

BAX appears to play an important role in suppressing cancer development, and decreased BAX levels are associated with chemo- and radioresistance in a number of cancers including lung cancer, chronic lymphocytic leukemia (CLL), and prostate cancer. Loss-of-function mutations of BAX have also been reported in hematopoietic malignancies in humans (PMID:9531611) and in gastrointestinal cancer of the microsatellite mutator phenotype (MMP), where BAX inactivation contributes to tumor progression by providing a survival advantage (PMID:9331106).

A number of anticancer drugs used clinically have been demonstrated to induce BAX activation indirectly to facilitate apoptosis of tumor cells. Recent efforts have demonstrated that BAX itself may be a promising direct target for small-molecule drug discovery for novel anticancer drugs and several direct BAX activators have been identified that may hold promise for cancer therapy, with the potential to overcome chemo- and radioresistance (PMID:25230299).


Product Specific Protocols
WB protocol for BAX antibody 50599-2-IgDownload protocol
IHC protocol for BAX antibody 50599-2-IgDownload protocol
IP protocol for BAX antibody 50599-2-IgDownload protocol
Standard Protocols
Click here to view our Standard Protocols




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The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Macarena Lucia (Verified Customer) (10-17-2022)

nice band

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:1000

ZEE (Verified Customer) (07-13-2020)

VERY GOOD antibody when western

  • Applications: Western Blot,
  • Primary Antibody Dilution: 1:1000
  • Cell Tissue Type: MOUSE HEART

Tanusree (Verified Customer) (12-18-2019)

Product worked well in WB at 1:500 dilution

  • Applications: Western Blot,
  • Primary Antibody Dilution: 1:500
  • Cell Tissue Type: Mouse brain

Kathryn (Verified Customer) (11-04-2019)

Image shows a post-natal day 2 mouse ovary with germ cells marked by TRA98 (Abcam) in green, and BAX (Proteintech) marked in red.

  • Applications: Immunofluorescence,
  • Primary Antibody Dilution: 1:100
  • Cell Tissue Type: mouse ovary
BAX Antibody Immunofluorescence, validation (1:100 dilution) in mouse ovary (Cat no:50599-2-Ig)