• Product name
    Anti-TAG72 antibody [CC49]
    See all TAG72 primary antibodies
  • Description
    Mouse monoclonal [CC49] to TAG72
  • Host species
  • Specificity
    This antibody has been shown to be distinct from B72.3 (ab691, ab1320-prediluted) by reciprocal competition radio-immunoassays and it has a Ka higher than that of B72.3.
  • Tested applications
    Suitable for: IHC-P, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Full length native protein (purified).

  • Positive control
    • Breast carcinoma



Our Abpromise guarantee covers the use of ab16838 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-P 1/50 - 1/100. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
ICC/IF 1/1.


  • Relevance
    The majority of human adenocarcinomas including colorectal, pancreatic, gastric, ovarian, endometrial, mammary, and non-small cell lung cancer display some cell populations that are positive for TAG72. About 60% of carcinoma patients express TAG72 in their sera. TAG72 is reportedly useful in distinguishing pulmonary adenocarcinomas from pleural mesotheliomas.
  • Cellular localization
  • Alternative names
    • CA 72.4 antibody
    • CA72.4 antibody
    • TAG 72 antibody
    • Tumor associated glycoprotein 72 antibody


  • ab16838 staining human colon carcinoma by IHC-P.
  • ICC/IF image of ab16838 stained MCF-7 cells. The cells were 4% formaldehyde (10 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 (ab16838, undiluted) overnight at +4°C. The secondary antibody (green) was ab96879 Dylight 488 goat anti-mouse 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.


This product has been referenced in:
  • Murad JP  et al. Effective Targeting of TAG72+ Peritoneal Ovarian Tumors via Regional Delivery of CAR-Engineered T Cells. Front Immunol 9:2268 (2018). Read more (PubMed: 30510550) »
  • Zhao X  et al. Variations of thioredoxin system contributes to increased susceptibility to apoptosis in cardiomyocytes of type 2 diabetic rats. Acta Biochim Biophys Sin (Shanghai) 46:318-29 (2014). Read more (PubMed: 24578161) »
See all 3 Publications for this product

Customer reviews and Q&As

1-5 of 5 Abreviews or Q&A


TAG72 antibody, ab16838, Lot GR99749-1: 66.6 ug/ml

Epcam antibody (Ber-EP4), ab7504, Lot GR103717-1: 47.3 ug/ml

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Thank you for contacting Abcam.

I found some information regarding the conjugation for antibodies that contain BSA through the link below:

Our tests have found that up to 0.5% BSA concentrations do not affect the conjugation chemistry. For BSA conjugations higher than 0.5%, we provide antibody concentration and antibody purification kits to remove BSA, azide, glycine, Tris, etc.:

If you do not have a conjugation system yet, we also provide EasyLink antibody conjugation kits for enzymatic, biotin/streptavidin, and fluorescent detection:

I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

Free Rabbit monoclonal antibody with any purchase of a primary antibody, while stocks last! Quote “RABMAB-XBSMG” in your next primary antibody order. For more information, visit the following link: https://www.abcam.com/index.html?pageconfig=resource&rid=15447

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Thank you for contacting us.

ab1320 and ab16838 are tissue culture supernatant, not purified antibodies. The concentration to the specific antibodies cannot be determined for these two products.

I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

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Thank you for your reply. Both of these antibodies are tissue culture supernatant meaning that it is not possible to determine antibody concentration, since tissue culture supernatant contains proteins besides the antibody of interest. Supernatant is the fluid resulting from centrifugation of hybridomas in tissue culture that are secreting specific monoclonal antibodies. Supernatants therefore typically contain culture medium, 5-10% fetal calf serum, and other proteins. Antibody concentration is only relevant for purified antibodies. I hope this information helps, please do not hesitate to contact us if you need any more advice or information.

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Thank you for your enquiry. There's no concentration information available for this antibody as it is provided in an unpurified form (tissue culture supernatant) and we cannot determine the concentration for unpurified products. To use the antibody in IHC-P, it is recommended to dilute the antibody 1/50-1/100. Please contact us again if you have any additional questions.

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