Validated using a knockout cell line

Recombinant Anti-Carbonic anhydrase 2/CA2 antibody [EPR5195] (ab124687)


  • Product name

    Anti-Carbonic anhydrase 2/CA2 antibody [EPR5195]
    See all Carbonic anhydrase 2/CA2 primary antibodies
  • Description

    Rabbit monoclonal [EPR5195] to Carbonic anhydrase 2/CA2
  • Host species

  • Tested applications

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

    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide corresponding to Human Carbonic anhydrase 2/CA2 aa 200-300 (C terminal).

  • Positive control

    • Human fetal brain, Caco 2, 293T, and Human heart lysates; Human kidney and brain tissues.
  • 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.

    This product is a recombinant rabbit monoclonal antibody.


  • Form

  • Storage instructions

    Shipped at 4°C. Store at -20°C. Stable for 12 months at -20°C.
  • Dissociation constant (KD)

    KD = 5.42 x 10 -10 M
    Learn more about KD
  • Storage buffer

    pH: 7.40
    Preservative: 0.05% Sodium azide
    Constituents: 40% Glycerol, 9.85% Tris glycine, 50% Tissue culture supernatant
  • Purity

    Tissue culture supernatant
  • Clonality

  • Clone number

  • Isotype

  • Research areas


Our Abpromise guarantee covers the use of ab124687 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. Detects a band of approximately 29 kDa (predicted molecular weight: 29 kDa).
IHC-P 1/250 - 1/500. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
  • Application notes
    Is unsuitable for Flow Cyt,ICC/IF or IP.
  • Target

    • Function

      Essential for bone resorption and osteoclast differentiation (By similarity). Reversible hydration of carbon dioxide. Can hydrates cyanamide to urea. Involved in the regulation of fluid secretion into the anterior chamber of the eye.
    • Involvement in disease

      Defects in CA2 are the cause of osteopetrosis autosomal recessive type 3 (OPTB3) [MIM:259730]; also known as osteopetrosis with renal tubular acidosis, carbonic anhydrase II deficiency syndrome, Guibaud-Vainsel syndrome or marble brain disease. Osteopetrosis is a rare genetic disease characterized by abnormally dense bone, due to defective resorption of immature bone. The disorder occurs in two forms: a severe autosomal recessive form occurring in utero, infancy, or childhood, and a benign autosomal dominant form occurring in adolescence or adulthood. Autosomal recessive osteopetrosis is usually associated with normal or elevated amount of non-functional osteoclasts. OPTB3 is associated with renal tubular acidosis, cerebral calcification (marble brain disease) and in some cases with mental retardation.
    • Sequence similarities

      Belongs to the alpha-carbonic anhydrase family.
    • Cellular localization

    • Information by UniProt
    • Database links

    • Alternative names

      • CA 2 antibody
      • CA II antibody
      • CA-II antibody
      • Ca2 antibody
      • CAC antibody
      • CAH2_HUMAN antibody
      • CAII antibody
      • Car 2 antibody
      • Car2 antibody
      • Carbonate dehydratase II antibody
      • Carbonic anhydrase 2 antibody
      • Carbonic anhydrase B antibody
      • Carbonic anhydrase C antibody
      • Carbonic anhydrase C, formerly antibody
      • Carbonic anhydrase II antibody
      • Carbonic dehydratase antibody
      • epididymis luminal protein 76 antibody
      • Epididymis secretory protein Li 282 antibody
      • HEL-76 antibody
      • HEL-S-282 antibody
      see all


    • ab124687, at 1/250 dilution, staining Carbonic anhydrase 2/CA2 in paraffin-embedded Human kidney tissue by Immunohistochemistry.

    • Lane 1: Wild-type HAP1 cell lysate (40 µg)
      Lane 2: Carbonic anhydrase 2/CA2 knockout HAP1 cell lysate (40 µg)
      Lane 3: A431 cell lysate (40 µg)
      Lane 4: HEK293 cell lysate (40 µg)
      Lanes 1 - 4: Merged signal (red and green). Green - ab124687 observed at 32 kDa. Red - loading control, ab8245, observed at 37 kDa.

      ab124687 was shown to specifically react with Carbonic anhydrase 2/CA2 when Carbonic anhydrase 2/CA2 knockout samples were used. Wild-type and Carbonic anhydrase 2/CA2 knockout samples were subjected to SDS-PAGE. Ab124687 and ab8245 (loading control to GAPDH) were diluted at 1/1000 and 1:10,000 dilution respectively and incubated overnight at 4C. Blots were developed with IRDye® 800CW Goat anti-Rabbit IgG (H + L) and IRDye® 680 Goat anti-Mouse IgG (H + L) secondary antibodies at 1:10,000 dilution for 1 hour at room temperature before imaging.

    • All lanes : Anti-Carbonic anhydrase 2/CA2 antibody [EPR5195] (ab124687) at 1/1000 dilution

      Lane 1 : Human fetal brain tissue lysate
      Lane 2 : Caco 2 cell lysate
      Lane 3 : 293T cell lysate
      Lane 4 : Human heart tissue lysate

      Lysates/proteins at 10 µg per lane.

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

      Predicted band size: 29 kDa
      Observed band size: 29 kDa

    • ab124687, at 1/250 dilution, staining Carbonic anhydrase 2/CA2 in paraffin-embedded Human brain tissue by Immunohistochemistry.

    • Equilibrium disassociation constant (KD)
      Learn more about KD

      Click here to learn more about KD


    This product has been referenced in:

    • Li H  et al. Expression and localization of Forkhead transcription factor A1 in the three-dimensional reconstructed eccrine sweat glands. Acta Histochem 120:520-524 (2018). Read more (PubMed: 29909922) »
    • Tachibana H  et al. Carbonic anhydrase 2 is a novel invasion-associated factor in urinary bladder cancers. Cancer Sci 108:331-337 (2017). Read more (PubMed: 28004470) »
    See all 7 Publications for this product

    Customer reviews and Q&As

    1-3 of 3 Abreviews or Q&A

    Western blot
    Loading amount
    10 µg
    Gel Running Conditions
    Reduced Denaturing (12.5% gel)
    Human Cell lysate - whole cell (293T)
    CA2-3xflag transfected
    Blocking step
    Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 4% · Temperature: 25°C

    Abcam user community

    Verified customer

    Submitted Jan 30 2015


    I heard back from the lab about the last two antibodies.
    For ab32362, the immunogen sequence shares 100% homology with pig.
    For ab124687, the immunogen peptide maps between amino acids 235 - 260, on the C-terminus of human CA2 (UniProt: P00918).
    I hope this information helps. Please contact us with any other question.

    Read More


    Thank you for your inquiry.

    For ab758, the immunogen that was used was cytoskeletal extract of human hepatocellular carcinoma cell line, Hep3B. We have not validated this antibody in pig. But the human sequence is 85% homologous with the pig cytokeratin 8 sequence. We generally say anything with >85% homology would be expected to cross-react, so this is right on the edge. However, we do have two anti-cytokeratin 8 antibodies that we know do work in pig as ab2531 and ab2530.

    For ab27988, this antibody has been validated in pig and we therefore guarantee it will work for pig in IHC-P, IHC-Fr in accordance with our Abpromise.

    For ab7504, the immunogen was human breast carcinoma cell line, MCF-7. Pig and human EpCAM is 83% homologous, so this is a little low. We have an anti-EpCAM that is predicted (>90% homology) to cross-react with pig, and that is ab71916. However, this hasn't been validated and therefore not guaranteed in pig.

    I have to check with the lab on ab32362 and ab124687 since I don't have the immunogens readily available to BLAST.

    For ab28028, full length native protein (purified): Vimentin isolated from bovine eye lens was used as an immunogen. Pig vimentin and bovine vimentin are 97% homologous, so there is a good chance this will cross-react with pig. However this hasn't been tested and therefore isn't validated in pig. We do have a few vimentin antibodies that work in pig though,like ab20346 and ab8069.

    For ab11333, cultured human thymic fibroblasts was used as an immunogen. We don't have a particular protein sequence to look up for this one, so unfortunately we don't know how/if it will work with pig.

    I hope this information helps. I'll be in touch again once I hear about ab32362 and ab124687.

    Read More

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