• Product name
  • Description
    Rabbit polyclonal to Caspase-9
  • Host species
  • Specificity
    No cross reactivity with other members of the caspase family. This antibody does not recognise the cleaved form of Caspase-9.
  • Tested applications
    Suitable for: IP, WBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide corresponding to Human Caspase-9 aa 41-56.


    Database link: P55211
    (Peptide available as ab7885)

  • Positive control
    • HeLa whole cell lysate



Our Abpromise guarantee covers the use of ab2013 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
IP Use at an assay dependent concentration.
WB 1/1000 - 1/2000. Predicted molecular weight: 46 kDa.Can be blocked with Human Caspase-9 peptide (ab7885).


  • Function
    Involved in the activation cascade of caspases responsible for apoptosis execution. Binding of caspase-9 to Apaf-1 leads to activation of the protease which then cleaves and activates caspase-3. Proteolytically cleaves poly(ADP-ribose) polymerase (PARP).
    Isoform 2 lacks activity is an dominant-negative inhibitor of caspase-9.
  • Tissue specificity
    Ubiquitous, with highest expression in the heart, moderate expression in liver, skeletal muscle, and pancreas. Low levels in all other tissues. Within the heart, specifically expressed in myocytes.
  • Sequence similarities
    Belongs to the peptidase C14A family.
    Contains 1 CARD domain.
  • Developmental stage
    Expressed at low levels in fetal heart, at moderate levels in neonate heart, and at high levels in adult heart.
  • Post-translational
    Cleavages at Asp-315 by granzyme B and at Asp-330 by caspase-3 generate the two active subunits. Caspase-8 and -10 can also be involved in these processing events.
  • Information by UniProt
  • Database links
  • Alternative names
    • APAF-3 antibody
    • APAF3 antibody
    • Apoptosis related cysteine peptidase antibody
    • Apoptotic protease Mch-6 antibody
    • Apoptotic protease-activating factor 3 antibody
    • CASP-9 antibody
    • CASP9 antibody
    • CASP9_HUMAN antibody
    • Caspase 9 apoptosis related cysteine peptidase antibody
    • Caspase 9 Dominant Negative antibody
    • Caspase 9c antibody
    • Caspase-9 antibody
    • Caspase-9 subunit p10 antibody
    • ICE LAP6 antibody
    • ICE like apoptotic protease 6 antibody
    • ICE-LAP6 antibody
    • ICE-like apoptotic protease 6 antibody
    • MCH6 antibody
    • PPP1R56 antibody
    • protein phosphatase 1, regulatory subunit 56 antibody
    • RNCASP9 antibody
    see all


  • Anti-Caspase-9 antibody (ab2013) at 1/1000 dilution + HeLa whole cell lysate

    Predicted band size: 46 kDa
    Observed band size: 46 kDa


This product has been referenced in:
  • Chen Z  et al. Protective effects of lncRNA H19 silence against hypoxia-induced injury in PC-12 cells by regulating miR-28. Int J Biol Macromol 121:546-555 (2019). Read more (PubMed: 30312698) »
  • Zhao Q  et al. Rhein protects against cerebral ischemic-/reperfusion-induced oxidative stress and apoptosis in rats. Int J Mol Med 41:2802-2812 (2018). Read more (PubMed: 29436613) »
See all 11 Publications for this product

Customer reviews and Q&As

1-7 of 7 Abreviews or Q&A

Western blot
Pig Cell lysate - other (Lion, muscle tissue)
Gel Running Conditions
Reduced Denaturing (8-16%)
Loading amount
150 µg
Lion, muscle tissue
Blocking step
Milk as blocking agent for 12 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 4°C

Mayra González

Verified customer

Submitted Jul 14 2016

Abcam guarantees this product to work in the species/application used in this Abreview.
Western blot
Human Cell lysate - whole cell (stomach cancer)
Loading amount
25 µg
stomach cancer
10uM WIN 55,212-2 for 24hrs
Gel Running Conditions
Reduced Denaturing (10% SDS-PAGE)
Blocking step
Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 25°C

Abcam user community

Verified customer

Submitted Mar 27 2013


Thank you for your enquiry. Antibody ab2013 will recognize the recombinant CASP9 protein ab52203. Based on the units of ab52203 per vial received, you will receive about 62ug recombinant caspase 9 protein in a vial of ab52203. I hope this is helpful. Please contact me again if you have any further questions.

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Thank you for your enquiry. Further to our telephone conversation this morning I have updated our datasheet regarding the specificity of this antibody for the uncleaved form of Caspase 9. I look forward to reading your Abreview. I have arranged for a free of charge replacement vial of ab25758 to be dispatched immediately (order number: 135138). I hope that this does not affect your choice of Abcam in the future.

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Thank you for your email. I have performed a search of our catalogue and I can tell you that ab28142 and ab2013 are your best antibodies for the detection of cleaved and uncleaved caspase 8 and 9 by western blotting. The notes of each antibody are as follows: ab28142 detects ~55 and 57 kDa proteins, corresponding to the apparent molecular masses of the proform of caspase-8 alpha and beta on SDS-PAGE immunoblots. In apoptotic cells, this antibody also detects the processed forms (42/44 kDa, 31, 26, 18 and 14kDa). ab2013 detects both the activated (35 or 37kDa cleaved fragment depending on activator) and non-activated caspase-9 (45kDa). I would recommend that you have a look at the antibody's respective datasheets by clicking on the links below. I hope this information helps, please do not hesitate to contact us if you need any more advice or information.

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No, to our knowledge, this anitbody has only been tested in WB.

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This antibody was made with a peptide located at amino acids 41-56 of human caspase-9. The peptide is located in the cleaved and activated fragment (35 or 37 kDa). Therefore, it should recognize the precursor and activated form although we have not tested the activated form. Our Western Blot tests show a strong, single band at 46kDa. It is human, mouse, and rat reactive.

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