• Product name
  • Description
    Rabbit polyclonal to NOTCH3
  • Host species
  • Tested applications
    Suitable for: WB, IHC-P, ICC/IF, IHC-FoFr, IHC-Frmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide corresponding to Human NOTCH3 aa 2300 to the C-terminus (C terminal) conjugated to Keyhole Limpet Haemocyanin (KLH).
    (Peptide available as ab26878)

  • Positive control
    • This antibody gave a positive signal in the following Human Cell lysates: K562 and CACO-2



Our Abpromise guarantee covers the use of ab23426 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 Use a concentration of 1 µg/ml. Detects a band of approximately 97,280 kDa (predicted molecular weight: 244 kDa).
IHC-P Use a concentration of 5 µg/ml. Perform heat mediated antigen retrieval before commencing with IHC staining protocol. PubMed: 19965627
ICC/IF Use at an assay dependent concentration. PubMed: 20680961
IHC-FoFr Use at an assay dependent concentration.
IHC-Fr 1/300.


  • Function
    Functions as a receptor for membrane-bound ligands Jagged1, Jagged2 and Delta1 to regulate cell-fate determination. Upon ligand activation through the released notch intracellular domain (NICD) it forms a transcriptional activator complex with RBPJ/RBPSUH and activates genes of the enhancer of split locus. Affects the implementation of differentiation, proliferation and apoptotic programs.
  • Tissue specificity
    Ubiquitously expressed in fetal and adult tissues.
  • Involvement in disease
    Defects in NOTCH3 are the cause of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) [MIM:125310]. CADASIL causes a type of stroke and dementia of which key features include recurrent subcortical ischemic events and vascular dementia. The disorder affects relatively young adults of both sexes. Mutations affect highly conserved cysteine residues within epidermal growth factor (EGF)-like repeat domains in the extracellular part of the receptor.
  • Sequence similarities
    Belongs to the NOTCH family.
    Contains 5 ANK repeats.
    Contains 34 EGF-like domains.
    Contains 3 LNR (Lin/Notch) repeats.
  • Post-translational
    Synthesized in the endoplasmic reticulum as an inactive form which is proteolytically cleaved by a furin-like convertase in the trans-Golgi network before it reaches the plasma membrane to yield an active, ligand-accessible form. Cleavage results in a C-terminal fragment N(TM) and a N-terminal fragment N(EC). Following ligand binding, it is cleaved by TNF-alpha converting enzyme (TACE) to yield a membrane-associated intermediate fragment called notch extracellular truncation (NEXT). This fragment is then cleaved by presenilin dependent gamma-secretase to release a notch-derived peptide containing the intracellular domain (NICD) from the membrane.
  • Cellular localization
    Cell membrane and Nucleus. Following proteolytical processing NICD is translocated to the nucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • CADASIL antibody
    • CASIL antibody
    • NOTC3_HUMAN antibody
    • Notch 3 antibody
    • Notch 3 intracellular domain antibody
    • Notch homolog 3 antibody
    • Notch3 antibody
    see all


  • ab23426 staining NOTCH3 in mouse pancreatic cancer tissue sections by Immunohistochemistry (IHC-Fr - frozen sections). Tissue was fixed with acetone and blocked with 10% serum for 1 hour at 20°C. Samples were incubated with the primary antibody (1/100 in PBS) for 8 hours at 4°C. A biotin-conjugated goat anti-rabbit IgG polyclonal (1/1000) was used as the secondary antibody.

    See Abreview

  • All lanes : Anti-NOTCH3 antibody (ab23426) at 1 µg/ml

    Lane 1 : K562 whole cell lysate (ab29306)
    Lane 2 : Caco 2 whole cell lysate (ab3950)
    Lane 3 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate

    Lysates/proteins at 10 µg per lane.

    All lanes : Goat polyclonal to Rabbit IgG - H&L (HRP) at 1/50000 dilution

    Developed using the ECL technique.

    Performed under reducing conditions.

    Predicted band size: 244 kDa
    Observed band size: 280,97 kDa (why is the actual band size different from the predicted?)
    Additional bands at: 105 kDa, 30 kDa. We are unsure as to the identity of these extra bands.

    Exposure time: 30 seconds

    This blot was produced using a 3-8% Tris Acetate gel under the TA buffer system. The gel was run at 150V for 60 minutes before being transferred onto a Nitrocellulose membrane at 30V for 70 minutes. The membrane was then blocked for an hour using 5% Bovine Serum Albumin before being incubated with ab23426 overnight at 4°C. Antibody binding was detected using an anti-rabbit antibody conjugated to HRP, and visualised using ECL development solution.

    The band observed at 97 kDa is thought to correspond to the notch-derived peptide containing the intracellular domain (NICD) of NOTCH3 as described in the literature (PMID:10712431).

  • ICC/IF image of ab23426 stained MCF7 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab23426, 5µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899, DyLight® 488 goat anti-rabbit IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

  • ab23426 staining NOTCH3 in human breast cancer tissue sections by immunohistochemistry (Formalin/PFA-fixed paraffin embedded sections). Tissue underwent fixation in paraformaldehyde, heat-mediated antigen retrieval in citrate buffer pH6.0 and blocking for 15 minutes at 20°C (5 minutes for peroxidase blocking and 10 minutes for protein blocks). The primary antibody was diluted 1/250 and incubated with sample for 45 minutes at 20°C. A HRP-conjugated goat polyclonal to rabbit IgG was used undiluted as secondary.

    See Abreview

  • IHC-FoFr image of NOTCH3 staining in Rat cerebral cortex (left) and the paraventricular hypothalamic nucleus (right) sections. The sections used came from animals perfused fixed with Paraformaldehyde 4%, in phosphate buffer 0.2M. Following postfixation in the same fixative overnight, the brains were cryoprotected in sucrose 30% overnight. Immunostainings were performed using the ‘free floating’ technique.

    See Abreview

  • ab14404 staining NOTCH3 in the COS1 fibroblast cell line from Monkey Kkidney by ICC/IF (Immunocytochemistry/immunofluorescence). Cells were fixed with paraformaldehyde, permeabilized with Triton X-100 0.1% in PBS and blocked with 1% BSA for 30 minutes at 25°C. Samples were incubated with primary antibody (1/200) for 16 hour at 4°C. An Alexa Fluor® 488-conjugated Goat anti-rabbit polyclonal (1/500) was used as the secondary antibody.

    See Abreview

  • IHC image of NOTCH3 staining in human breast carcinoma formalin fixed paraffin embedded tissue section, performed on a Leica BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab23426, 5µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.


This product has been referenced in:
  • Idowu J  et al. Aberrant Regulation of Notch3 Signaling Pathway in Polycystic Kidney Disease. Sci Rep 8:3340 (2018). WB . Read more (PubMed: 29463793) »
  • Lou S  et al. Curcumin induces apoptosis and inhibits proliferation in infantile hemangioma endothelial cells via downregulation of MCL-1 and HIF-1a. Medicine (Baltimore) 97:e9562 (2018). Read more (PubMed: 29443732) »

See all 45 Publications for this product

Customer reviews and Q&As

Unfortunately it is not possible for us to sell the pre-immune serum of our rabbits.
I am sorry that on this occasion I could not be of more help.

Thank you for contacting us.
I am pleased to hear that you consider participating in our AbTrial programme. For the reason that the AbTrial Code is restricted for 4 month after issuing I would suggest you let me know in January if you decide to ac...

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Thank you for contacting Abcam regarding ab23426.

Regarding the immunogen information, please contact us directly as the specific sequence is proprietary.

The entire sequence is contained within the intracellular domain....

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Thank you for your reply and for the additional information.

The antibody will be less stable at 1:100, though the storage at -20C will help prevent degradation. I think it's possible that the antibody is still fine to use, though I would rec...

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Thank you for contacting us with your question.

The antibody stock solution is provided in 1% BSA, howeverit is fine tomake your working dilutions ina buffer appropriate for your assay (such as PBS, PBST, TBS, or TBST)with or without BSA. We ...

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Thank you for contacting us.

It appears we do not have an antibody that is raised against or is known to be reactive with the amino acidranges you specified for the Notch proteins.

Please do not hesitate to contact us if you have ...

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Human breast cancer is a good positve control on its own. Brain tissue would be another positive control.


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