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  • KD/KO Validated

c-Fos Monoclonal antibody

c-Fos Monoclonal Antibody for FC, WB, ELISA

Host / Isotype

Mouse / IgG1


Human, rat, mouse and More (1)







Cat no : 66590-1-Ig


AP 1, C FOS, Cellular oncogene fos, c-Fos, FOS, G0S7, Proto oncogene c Fos

Tested Applications

Positive WB detected inHeLa cells, HepG2 cells, U-937 cells, K-562 cells, THP-1 cells, Jurkat cells, RAW 264.7 cells
Positive FC detected inHeLa cells

Recommended dilution

Western Blot (WB)WB : 1:5000-1:50000
Sample-dependent, check data in validation data gallery

Product Information

66590-1-Ig targets c-Fos in WB, IHC, FC, ELISA applications and shows reactivity with Human, rat, mouse samples.

Tested Reactivity Human, rat, mouse
Cited Reactivityhuman, mouse
Host / Isotype Mouse / IgG1
Class Monoclonal
Type Antibody
Immunogen c-Fos fusion protein Ag24340
Full Name FOS
Calculated molecular weight 41 kDa
Observed molecular weight 55-60 kDa
GenBank accession numberBC004490
Gene symbol FOS
Gene ID (NCBI) 2353
Conjugate Unconjugated
Form Liquid
Purification Method Protein G 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

c-Fos, also named as FOS and G0/G1 switch regulatory protein 7, is a 380 amino acid protein, which contains 1 bZIP (basic-leucine zipper) domain and belongs to the bZIP family. c-Fos is expressed at very low levels in quiescent cells. When cells are stimulated to reenter growth, c-Fos undergo 2 waves of expression, the first one peaks 7.5 minutes following FBS induction. At this stage, the c-Fos protein is localized endoplasmic reticulum. The second wave of expression occurs at about 20 minutes after induction and peaks at 1 hour. At this stage, the c-FOS protein becomes nuclear. c-Fos is a very short-lived intracellular protein, which is very easy to degrade. The calculated molecular weight of c-Fos is 40 kDa, but Phosphorylated c-Fos protein is about 60-65 kDa. It is involved in important cellular events, including cell proliferation, differentiation and survival; genes associated with hypoxia; and angiogenesis; which makes its dysregulation an important factor for cancer development. It can also induce a loss of cell polarity and epithelial-mesenchymal transition, leading to invasive and metastatic growth in mammary epithelial cells. Expression of c-Fos is an indirect marker of neuronal activity because c-Fos is often expressed when neurons fire action potentials. Upregulation of c-Fos mRNA in a neuron indicates recent activity.


Product Specific Protocols
WB protocol for c-Fos antibody 66590-1-IgDownload protocol
FC protocol for c-Fos antibody 66590-1-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.


Tatyana (Verified Customer) (01-21-2023)

Suitable for IHC in the paraffinised brain sections of mice (cortex). Samples were fixed in 4% and standard IHC procedure with antigen retrieval and DAB detection was performed. Antibody was incubated at 1:1000 dilution overnight at 4C. Provided a good specific signal in neurons that increased after restraint stress.

  • Applications: Immunohistochemistry
  • Primary Antibody Dilution: 1:1000
  • Cell Tissue Type: Mouse CNS tissue
c-Fos Antibody Immunohistochemistry validation (1:1000 dilution) in Mouse CNS tissue (Cat no:66590-1-Ig)