Validated using a knockout cell line

Recombinant Anti-Fatty Acid Synthase antibody [EPR7465] (ab128856)


  • Product name

    Anti-Fatty Acid Synthase antibody [EPR7465]
    See all Fatty Acid Synthase primary antibodies
  • Description

    Rabbit monoclonal [EPR7465] to Fatty Acid Synthase
  • Host species

  • Tested applications

    Suitable for: WB, Flow Cyt, ICC/IF, IHC-Frmore details
    Unsuitable for: IHC-P or IP
  • Species reactivity

    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide within Human Fatty Acid Synthase aa 1-100. The exact sequence is proprietary.
    Database link: P49327

  • Positive control

    • WB: HeLa, 293T, A549, SHSY-5Y and MOLT4 cell lysates. ICC/IF: A549 cells. IHC-Fr: Human peritoneal tumor tissue. Flow Cytometry: A549 cells.
  • General notes

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

    We are constantly working hard to ensure we provide our customers with best in class antibodies. As a result of this work we are pleased to now offer this antibody in purified format. We are in the process of updating our datasheets. The purified format is designated 'PUR' on our product labels. If you have any questions regarding this update, please contact our Scientific Support team.

    This product is a recombinant rabbit monoclonal antibody.


Our Abpromise guarantee covers the use of ab128856 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
WB 1/1000 - 1/10000. Predicted molecular weight: 273 kDa.
Flow Cyt 1/10 - 1/100.

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.


ICC/IF 1/250 - 1/500.
IHC-Fr Use at an assay dependent concentration.
  • Application notes
    Is unsuitable for IHC-P or IP.
  • Target

    • Function

      Fatty acid synthetase catalyzes the formation of long-chain fatty acids from acetyl-CoA, malonyl-CoA and NADPH. This multifunctional protein has 7 catalytic activities and an acyl carrier protein.
    • Tissue specificity

      Ubiquitous. Prominent expression in brain, lung, and liver.
    • Sequence similarities

      Contains 1 acyl carrier domain.
    • Cellular localization

      Cytoplasm. Melanosome. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.
    • Information by UniProt
    • Database links

    • Alternative names

      • [Acyl-carrier-protein] S acetyltransferase antibody
      • [Acyl-carrier-protein] S malonyltransferase antibody
      • 3-hydroxypalmitoyl-[acyl-carrier-protein] dehydratase antibody
      • 3-oxoacyl-[acyl-carrier-protein] reductase antibody
      • 3-oxoacyl-[acyl-carrier-protein] synthase antibody
      • Enoyl-[acyl-carrier-protein] reductase antibody
      • FAS antibody
      • FAS_HUMAN antibody
      • FASN antibody
      • Fatty acid synthase antibody
      • MGC14367 antibody
      • MGC15706 antibody
      • OA 519 antibody
      • Oleoyl-[acyl-carrier-protein] hydrolase antibody
      • SDR27X1 antibody
      • Short chain dehydrogenase/reductase family 27X member 1 antibody
      see all


    • Lane 1: Wild-type HAP1 cell lysate (20 µg)
      Lane 2: Fatty Acid Synthase knockout HAP1 cell lysate (20 µg)
      Lane 3: A549 cell lysate (20 µg)
      Lane 4: Hu liver tissue lysate (20 µg)
      Lanes 1 - 4: Merged signal (red and green). Green - ab128856 observed at 250 kDa. Red - loading control, ab18058, observed at 124 kDa.

      ab128856 was shown to specifically react with Fatty Acid Synthase in wild-type HAP1 cells. No band was observed when Fatty Acid Synthase knockout samples were examined. Wild-type and Fatty Acid Synthase knockout samples were subjected to SDS-PAGE. ab128856 and ab18058 (loading control to Vinculin) were diluted at 1/1000 and 1/10,000 respectively and incubated overnight at 4°C. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed (ab216776) secondary antibodies at 1/10,000 dilution for 1 hour at room temperature before imaging.

    • All lanes : Anti-Fatty Acid Synthase antibody [EPR7465] (ab128856) at 1/1000 dilution

      Lane 1 : HeLa cell lysate
      Lane 2 : 293T cell lysate
      Lane 3 : A549 cell lysate
      Lane 4 : SHSY-5Y cell lysate
      Lane 5 : MOLT4 cell lysate

      Lysates/proteins at 10 µg per lane.

      All lanes : HRP labelled goat anti-rabbit at 1/2000 dilution

      Predicted band size: 273 kDa

    • ab128856 at a 1/250 dilution staining Fatty Acid Synthase in A549 cells by immunofluorescence.
    • ab128856 staining Fatty Acid Synthase in human peritoneal tumor tissue sections by Immunohistochemistry (IHC-Fr - frozen sections). Tissue was fixed with paraformaldehyde and blocked with 1% BSA for 1 hour at room temperature. Samples were incubated with primary antibody (1/500) for 2 hours. An Alexa Fluor® 647-conjugated anti-rabbit IgG monoclonal (1/1000) was used as the secondary antibody.

      See Abreview

    • Overlay histogram showing A549 cells stained with ab128856 (red line). The cells were fixed with 4% paraformaldehyde (10 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 (ab128856, 1/100 dilution) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-rabbit IgG (H&L) (ab150077) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (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. This antibody gave a positive signal in A549 cells fixed with 80% methanol (5 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.
    • Equilibrium disassociation constant (KD)
      Learn more about KD

      Click here to learn more about KD


    This product has been referenced in:

    • Cheng XY  et al. miR-203 Inhibits Alcohol-Induced Hepatic Steatosis by Targeting Lipin1. Front Pharmacol 9:275 (2018). Read more (PubMed: 29670525) »
    • Cao W  et al. Hoxa5 Promotes Adipose Differentiation via Increasing DNA Methylation Level and Inhibiting PKA/HSL Signal Pathway in Mice. Cell Physiol Biochem 45:1023-1033 (2018). Read more (PubMed: 29439250) »
    See all 4 Publications for this product

    Customer reviews and Q&As

    1-6 of 6 Abreviews or Q&A

    Flow Cytometry
    Human Cell (Peripheral blood mononuclear cells)
    Yes - Methanol
    Gating Strategy
    Live cells.
    Peripheral blood mononuclear cells

    Abcam user community

    Verified customer

    Submitted Feb 19 2018

    Western blot
    Rat Tissue lysate - whole (rat liver)
    Gel Running Conditions
    Reduced Denaturing (7% SDS-PAGE)
    Loading amount
    20 µg
    rat liver
    Blocking step
    BSA as blocking agent for 30 minute(s) · Concentration: 5% · Temperature: 25°C

    Abcam user community

    Verified customer

    Submitted Sep 05 2016

    Immunocytochemistry/ Immunofluorescence
    Mouse Cell (Mouse Cell (Tumor))
    Yes - 0.3% triton x100
    Mouse Cell (Tumor)
    Blocking step
    BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: RT°C

    Abcam user community

    Verified customer

    Submitted Jan 05 2016

    Immunohistochemistry (Frozen sections)
    Blocking step
    BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: RT°C
    Human Tissue sections (Peritoneal tumor)
    Peritoneal tumor

    Abcam user community

    Verified customer

    Submitted Oct 14 2014

    Western blot
    Loading amount
    30 µg
    Gel Running Conditions
    Reduced Denaturing (8% GEL, SDS PAGE)
    Human Cell lysate - other (LS180)
    Blocking step
    Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: RT°C

    Abcam user community

    Verified customer

    Submitted Oct 01 2013


    Thank you for contacting us.

    I have reviewed the immunogen information for each of our anti-Fatty Acid Synthase antibodies. Unfortunately none have homologies which would guarantee they could work in Musca domestica, however ab128856 Rabbit monoclonal [EPR7465] to Fatty Acid Synthase does have an 87% positive identity score. Further the identical residues are grouped, which would be necessary for epitope recognition. Since the product has not yet been tested in house fly, we cannot guarantee that it will work, however, for UNTESTED applications; we have established a testing discount program. Here is a brief description of how it works:

    The testing discount program is for customers who like to use an antibody/protein on an untested species/application. You would purchase the antibody at full price, test it and submit an Abreview with your data (positive or negative). On your next order you will receive a discount equal to the value of the product tested. The terms and conditions of this offer can be found here:

    I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

    Free Rabbit monoclonal antibody with any purchase of a primary antibody, while stocks last! Quote “RABMAB-XBSMG” in your next primary antibody order. For more information, visit the following link:

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