• Product nameAnti-FOXP1 antibody
    See all FOXP1 primary antibodies
  • Description
    Rabbit polyclonal to FOXP1
  • Tested applicationsSuitable for: IHC-FoFr, IP, WB, IHC-P, ICC/IFmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Chicken, Human
    Predicted to work with: Dog, Xenopus laevis
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 650 to the C-terminus of Human FOXP1.

    (Peptide available as ab20276.)

  • Positive control
    • This antibody gave a positive signal in Jurkat nuclear lysate.



Our Abpromise guarantee covers the use of ab16645 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
IHC-FoFr 1/200 - 1/500. PubMed: 20364144
IP Use at an assay dependent concentration.
WB 1/5000. Detects a band of approximately 75 kDa (predicted molecular weight: 75 kDa).

ab16645 recognises the different isoforms of FOXP1 in Jurkat cell lysate (see review for further details).

IHC-P 1/200. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
ICC/IF 1/500.


  • FunctionTranscriptional repressor. It plays an important role in the specification and differentiation of lung epithelium. Can act with CTBP1 to synergistically repress transcription but CTPBP1 is not essential. Essential transcriptional regulator of B cell development.
  • Involvement in diseaseNote=A chromosomal aberration involving FOXP1 is found in acute lymphoblastic leukemia. Translocation t(9;3)(p13;p14.1) with PAX5.
    Defects in FOXP1 are the cause of mental retardation with language impairment and autistic features (MRLIAF) [MIM:613670]. It is a developmental disorder characterized by mild to moderate mental retardation, language impairment, and autistic features. Patients show global delay, delayed walking, severely delayed speech development, and behavioral abnormalities, including irritability, hyperactivity, aggression, and stereotypical rigid behaviors.
  • Sequence similaritiesContains 1 C2H2-type zinc finger.
    Contains 1 fork-head DNA-binding domain.
  • DomainThe leucine-zipper is required for dimerization and transcriptional repression.
  • Cellular localizationNucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • 12CC4 antibody
    • FLJ23741 antibody
    • Fork head related protein like B antibody
    • Forkhead box P1 antibody
    • Forkhead box protein P1 antibody
    • FOX P1 antibody
    • FOXP 1 antibody
    • foxp1 antibody
    • FOXP1_HUMAN antibody
    • Glutamine rich factor 1 antibody
    • hFKH1B antibody
    • HSPC215 antibody
    • MGC12942 antibody
    • MGC88572 antibody
    • MGC99551 antibody
    • QRF 1 antibody
    • QRF1 antibody
    see all

Anti-FOXP1 antibody images

  • Image courtesy of Human Protein Atlas

    ab16645 staining FOXP1 in human small intestine. Paraffin embedded human small intestine tissue was incubated with ab16645 (1/200 dilution) for 30 mins at room temperature. Antigen retrieval was performed by heat induction in citrate buffer pH 6.

    ab16645 was tested in a tissue microarray (TMA) containing a wide range of normal and cancer tissues as well as a cell microarray consisting of a range of commonly used, well characterised human cell lines.

    Further results for this antibody can be found at www.proteinatlas.org

  • ab14404 staining FOXP1 in mouse pancreatic cancer primary cells by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were fixed with methanol/acetone (1:1), permeabilized with Triton 0.025% in PBS and blocked with 10% serum for 1 hour at room temperature. Samples were incubated with primary antibody (1/200 in PBS) for 4 hours. An Alexa Fluor®488-conjugated Donkey anti-rabbit polyclonal (1/1000) was used as the secondary antibody.

    See Abreview

  • All lanes : Anti-FOXP1 antibody (ab16645) at 1/5000 dilution

    Lane 1 : Lysate from e12.5 whole mouse embryo FoxP1 +/-
    Lane 2 : Lysate from e12.5 whole mouse embryo FoxP1 -/-

    Lysates/proteins at 30 µg per lane.

    Developed using the ECL technique

    Predicted band size : 75 kDa
    Observed band size : 65,82 kDa (why is the actual band size different from the predicted?)
    Additional bands at : 45 kDa (possible cross reactivity),50 kDa (possible cross reactivity),85 kDa (possible cross reactivity).
  • ab16645 was tested in IHC of formalin fixed sections from mouse (over two weeks of age) brain. Antigen retrieval was in citrate buffer and blocking was in 1% BSA. The primary antibody was incubated at a dilution of 1/200 overnight at 4 degrees celsius. The secondary antibody was a biotin conjugated anti-rabbit IgG.

References for Anti-FOXP1 antibody (ab16645)

This product has been referenced in:
  • Houlihan SL  et al. Upregulation of neurovascular communication through filamin abrogation promotes ectopic periventricular neurogenesis. Elife 5:N/A (2016). IHC-Fr ; Mouse . Read more (PubMed: 27664421) »
  • Precious SV  et al. FoxP1 marks medium spiny neurons from precursors to maturity and is required for their differentiation. Exp Neurol 282:9-18 (2016). ICC/IF ; Mouse . Read more (PubMed: 27154297) »

See all 26 Publications for this product

Product Wall

Application Immunocytochemistry/ Immunofluorescence
Sample Human Cell (mesenchymal stem cells)
Permeabilization Yes - Triton 0.25%
Specification mesenchymal stem cells
Blocking step BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: 25°C
Fixative Paraformaldehyde

Abcam user community

Verified customer

Submitted Jul 04 2016

Application Immunoprecipitation
Sample Human Cell lysate - whole cell (HEK293T cell line)
Total protein in input 20 µg
Treatment Calcium Phosphate Transfection of HA-tagged FOXP1
Immuno-precipitation step Protein G
Specification HEK293T cell line

Abcam user community

Verified customer

Submitted Nov 18 2015

Application Flow Cytometry
Sample Human Cell (Differentiated hNSCs)
Permeabilization Yes - 0.25% Triton X-100 in DPBS
Gating Strategy Undifferentiated Stem Cells (white)
Specification Differentiated hNSCs
Preparation Cell harvesting/tissue preparation method: Accutase
Sample buffer: PBS
Fixation Paraformaldehyde

Abcam user community

Verified customer

Submitted Aug 15 2015

Application Immunocytochemistry/ Immunofluorescence
Blocking step BSA as blocking agent for 30 minute(s) · Concentration: 1% · Temperature: 25°C
Sample Human Cell (Differentiated hNSCs)
Specification Differentiated hNSCs
Permeabilization Yes - 0.25% Triton X-100 in DPBS
Fixative Paraformaldehyde

Abcam user community

Verified customer

Submitted Feb 16 2015

Application ChIP
Detection step Other
Sample Mouse Cell lysate - nuclear (Spleen)
Specification Spleen
Negative control Input
Type Cross-linking (X-ChIP)
Duration of cross-linking step: 10 minute(s) and 0 second(s)
Specification of the cross-linking agent: HCHO
Positive control anti-Foxp1

Dr. Xi Chen

Verified customer

Submitted Jul 18 2014

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)
Sample Human Tissue sections (artery)
Specification artery
Fixative Paraformaldehyde
Antigen retrieval step Heat mediated - Buffer/Enzyme Used: Tris-EDTA
Permeabilization No
Blocking step Serum as blocking agent for 30 minute(s) · Concentration: 10% · Temperature: 20°C

Abcam user community

Verified customer

Submitted May 22 2012

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Western blot
Sample Human Cell lysate - whole cell (vascular smooth muscle cell)
Loading amount 20 µg
Specification vascular smooth muscle cell
Gel Running Conditions Reduced Denaturing (4-12% gradient)
Blocking step Milk as blocking agent for 30 minute(s) · Concentration: 5% · Temperature: 20°C

Abcam user community

Verified customer

Submitted Apr 23 2012

Thank you for contacting us.

I am sorry that this antibody did not perform as stated on the datasheet, I have asked our Finance department to issue a credit note for you. The credit note may be used in one of the following ways:


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Thank you for your reply and for sending us your data and images. The details provided will enable us to investigate this case and will provide us with vital information for monitoring product quality. Having reviewed this case, I would like to offer s...

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Thank you for contacting Abcam regarding ab16645. I am sorry that you are experiencing difficulties with this antibody.  I have run a report and we have not received any other reports from customers that this antibody is showing non-specific or mis...

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