Human Cancer Antigen CA19-9 ELISA Kit (ab108642)


  • Product name
    Human Cancer Antigen CA19-9 ELISA Kit
  • Detection method
  • Sample type
  • Assay type
    Sandwich (quantitative)
  • Sensitivity
    = 5 U/ml
  • Range
    5 U/ml - 600 U/ml
  • Assay duration
    Multiple steps standard assay
  • Species reactivity
    Reacts with: Human
  • Product overview

    ab108642 Cancer Antigen CA19-9 Human ELISA Kit is intended for the quantitative determination of the Cancer Antigen CA19-9 concentration in Human serum.

    A group of mucin type glycoprotein Sialosyl Lewis Antigens (SLA), such as CA19-9 and CA19-5, have come to be recognized as circulating cancer associated antigens for gastrointestinal cancer. Cancer Antigen CA19-9 represents the most important and basic carbohydrate tumor marker. The immunohistologic distribution of Cancer Antigen CA19-9 in tissues is consistent with the quantitative determination of higher CA19-9 concentrations in cancer than in normal or inflamed tissues. Recent reports indicate that the serum CA19-9 level is frequently elevated in the serum of subjects with various gastrointestinal malignancies, such as pancreatic, colorectal, gastric and hepatic carcinomas. Research studies demonstrate that serum CA19-9 values may have utility in monitoring subjects with the above-mentioned diagnosed malignancies. It has been shown that a persistent elevation in serum CA19-9 value following treatment may be indicative of occult metastatic and/or residual disease. A persistently rising serum Cancer Antigen CA19-9 value may be associated with progressive malignant disease and poor therapeutic response. A declining Cancer Antigen CA19-9 value may be indicative of a favorable prognosis and good response to treatment.

  • Tested applications
    Suitable for: ELISAmore details
  • Platform



Our Abpromise guarantee covers the use of ab108642 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
ELISA Use at an assay dependent dilution.


  • Cancer Antigen CA19-9 Standard Curve



ab108642 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

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I am sorry I could not find a document where it say the kit is tested with plasma samples - this might not have been tried in past. I would recommend using this kit as we discussed on phone; I don't see a reason wh...

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I can confirm that The CA19-9 standards in the ab108642 kit are prepared from partially purified CA19-9 antigen. The source is human fluids, not a recombinant protein. The standards are calibrated against other ki...

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We sincerely apologize that there has been an error on the datasheet information. The Enzyme Conjugate Concentrate (12X) component volume is 1.1ml, not 2ml as previously stated. Please rest assured that the volume...

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Thank you for your message and inquiry.

I can confirm that in this assay (ab108642 - Cancer Antigen CA19-9 Human ELISA Kit) the same antibody is used for both capture and detection. The subclass of this antibody is IgG1.

I hope this...

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Thank you for letting us know. I am very sorry to hear that you have been experiencing difficulties with this products (ab108642: Cancer Antigen CA19-9 Human ELISA Kit).

We have been using Corning's micotiter plates for more than 15 years. T...

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Thank you for your inquiry. I am happy to confirm that this kit is normally used with neat undiluted samples. The standard curve ranges from 0 - 600 U/mL with a estimated minimum detectable concentration of 10 U/mL. This kit is for research use only, b...

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Thank you very much for your email. It seems that wehave sent the updated version of the productwiththe non-updated version ofproductdatasheet and protocol.There have been few changes in the protocol that were not updated on the website. We sincerely a...

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Sorry for the delay in getting back to you, I now have confirmation of the information requested. As we had assumed, the standards are labeled 1-6 from 0 to 600 U/mL, i.e standard 1 contains 0 U/ml, standard 2 contains 25 U/ml and so on with standard 6...

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Thank you for your inquiry. This kit has a shelf life of 1 year.  For the lots that you ordered, we would expect them to be good until October 2012 when stored properly. I hope this information helps.  Please contact us with any other questions.

Thank you for your enquiry. I can confirm that this kit is sourced externally. They have kindly provided the following information: 1. When this kit was first designed, the antigens used were not pure.  So the antigen concentrations was expressed in U/...

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