Anti-FASN antibody produced in rabbit

enhanced validation

Prestige Antibodies® Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution

Anti-Fatty acid synthase
Human Protein Atlas Number:

biological source


Quality Level

antibody form

affinity isolated antibody

antibody product type

primary antibodies



product line

Prestige Antibodies® Powered by Atlas Antibodies


buffered aqueous glycerol solution

species reactivity



antibody small pack of 25 μL

enhanced validation

orthogonal RNAseq
Learn more about Antibody Enhanced Validation


immunoblotting: 0.04-0.4 μg/mL
immunofluorescence: 0.25-2 μg/mL
immunohistochemistry: 1:50-1:200

immunogen sequence




UniProt accession no.

shipped in

wet ice

storage temp.


Gene Information

human ... FASN(2194)

General description

FASN (fatty acid synthase) is a large, multidomain, lipogenic protein. It is composed of seven catalytic domains, which include β-ketoacyl synthase (KS), malonyl acetyl transferase, dehydratase (DH), enoyl-acyl carrier protein-reductase (ER), β-ketoacyl reductase (KR), acyl carrier protein (ACP), and thioesterase domains. This protein exists in a functionally homodimeric form. Under normal conditions, it is expressed at low levels.


Fatty acid synthase recombinant protein epitope signature tag (PrEST)

Biochem/physiol Actions

FASN (fatty acid synthase) is responsible for the biogenesis of long chain saturated fatty acids, which make up lipid signaling molecules, membranes and anchors for membrane proteins. This protein is linked to multiple disorders such as, hepatic steatosis, cancer, inflammation, obesity and diabetes. It is highly up-regulated in multiple cancers such as, breast, lung, prostate, colon, pancreatic and bladder. In breast cancer, this protein controls liver fatty acid-binding protein (L-FABP), vascular endothelial growth factor (VEGF) and VEGF Receptor-2 (VEGFR2), thus, promoting epithelial-mesenchymal transition of breast cancer cells. Trastuzumab-resistance in breast cancer is mediated by the up-regulation of FASN by Pin-1 (peptidylprolyl cis/trans isomerase, NIMA-interacting 1) protein. It is up-regulated in malignant gliomas, and might have potential as a therapeutic target for the drug Orlistat.

Features and Benefits

Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.

Every Prestige Antibody is tested in the following ways:
  • IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
  • Protein array of 364 human recombinant protein fragments.


Corresponding Antigen APREST70489.

Physical form

Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide

Legal Information

Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Katherine H Sippel et al.
The Journal of biological chemistry, 289(48), 33287-33295 (2014-10-11)
Human fatty acid synthase (FAS) is a large, multidomain protein that synthesizes long chain fatty acids. Because these fatty acids are primarily provided by diet, FAS is normally expressed at low levels; however, it is highly up-regulated in many cancers....
Anup S Ramdhave et al.
American journal of translational research, 9(3), 830-844 (2017-04-08)
Emerging evidence suggests that, dysregulation of fatty acid synthase (FASN) and insulin-like growth factor-1 (IGF-1) could play a vital role in pathology of various diseases. Our aim was to determine the changes in FASN and IGF-1 levels concomitant to long...
Novel nuclear localization of fatty acid synthase correlates with prostate cancer aggressiveness.
Madigan AA, Rycyna KJ, Parwani AV, et al.
The American Journal of Pathology, 184(8), 2156-2162 (2014)
Junqin Li et al.
International journal of biological sciences, 10(2), 171-180 (2014-02-13)
This study aimed to investigate the role of fatty acid synthase (FASN) in the epithelial-mesenchymal transition (EMT) of breast cancer cells. MCF-7 cells and MCF-7 cells overexpressing mitogen-activated protein kinase 5 (MCF-7-MEK5) were used in this study. MCF-7-MEK5 cells showed...
A Jayakumar et al.
Genomics, 23(2), 420-424 (1994-09-15)
We have isolated and sequenced 0.5- and 3.6-kb cDNA clones that cover the N-terminal and carboxy-terminal regions, respectively, of the human fatty acid synthase. To localize the fatty acid synthase gene and to define its genomic structure, we have also...
Information on fatty acid synthesis and metabolism in cancer cells. Learn how proliferatively active cells require fatty acids for functions such as membrane generation, protein modification, and bioenergetic requirements. These fatty acids are derived either from dietary sources or are synthesized by the cell.
Read More

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