Purified anti-human TRA-1-81 Antibody

Pricing & Availability
TRA-1-81 (See other available formats)
Regulatory Status
Other Names
Mouse IgM, κ
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Product Citations
Human teratocarcinoma cell line, NCCIT, stained with purified TRA-1-81, followed by anti-mouse IgM PE
  • a-Tra-1-81_Pure_061208.jpg
    Human teratocarcinoma cell line, NCCIT, stained with purified TRA-1-81, followed by anti-mouse IgM PE
  • b-TRA-1-81_Purified_WB_052314.jpg
    Western blot analysis of NTERA-2 (lane 1), NF-1 (lane 2) and Hela (lane 3) cells using anti-TRA-1-81 antibody (TRA-1-81). GAPDH (poly6314) was used a loading control.
  • c-TRA-1-81_PURE_TRA-1-81_ICC_012121
    HUES-9 ES cell colony was stained with Tra-1-81 antibody at 1:400 and then secondarily stained with Alexa Fluor® 546 goat anti-mouse IgM at 1:250 (red). Nuclei were counterstained with DAPI (blue). Image was provided by Eric O'Connor and Karl Marquez, Sanford Consortium for Regenerative Medicine.
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330702 100 µg 203€
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The TRA-1-81 antibody reacts with a 200-240 kD cell surface antigen expressed by human embryonic stem cells (ESC), embryonic germ cells (EG), and embryonal carcinoma cells. The expression of TRA-1-81 on human ESC is downregulated upon differentiation. Further studies have shown that TRA-1-81 is a neuroaminidase-resistant carbohydrate epitope expressed on podocalyxin, a member of mucin-like glycoprotein with CD34 family. Podocalyxin is a type I tranmembrane sialoprotein with anti-adhesion property.

Product Details
Technical Data Sheet (pdf)

Product Details

Verified Reactivity
Antibody Type
Host Species
Human embryonic carcinoma cell line 2102Ep cl.2A6
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography.
0.5 mg/mL
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C.

FC - Quality tested
WB - Verified
IP, ICC, IHC, ELISA - Reported in the literature, not verified in house

Recommended Usage

Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤ 0.5 µg per million cells in 100 µL volume. It is recommended that the reagent be titrated for optimal performance for each application.

Application Notes

Additional reported applications (for the relevant formats) include: immunofluorescence cell staining1, immunoprecipitation1, Western blotting1,2, ELISA1, and immunohistochemistry1 of acetone-fixed frozen tissue sections and formalin-fixed paraffin-embedded sections.

Application References
  1. Andrews PW, et al. 1984. Hybridoma. 3:347.
  2. Schopperle WM and Dewolf WC. 2007. Stem Cells. 25:723.
Product Citations
  1. Chen X, et al. 2017. Nat Commun. 10.1038/s41467-017-00687-1. PubMed
  2. Hey CAB et al. 2018. Stem cell research. 31:235-239 . PubMed
  3. McLenachan S et al. 2019. Stem Cell Res. 1723:17:00 . PubMed
  4. Claassen JN et al. 2019. Stem Cell Res. 1723:12:00 . PubMed
  5. Frederiksen HR et al. 2019. Stem cell research. 1725:03:00 . PubMed
  6. Frederiksen HR et al. 2019. Stem cell research. 1723:28:00 . PubMed
  7. Schmid B et al. 2019. Stem Cell Res. 1723:09:00 . PubMed
  8. Hey CAB et al. 2018. Stem Cell Res. 33:46-50 . PubMed
  9. Themeli M, et al. 2020. Stem Cell Reports. 14:300. PubMed
  10. Sanchez–Duffhues G, et al. 2020. Stem Cell Research. 72.29097222. PubMed
  11. Kamata M, et al. 2010. PLoS One. 5:e11834. PubMed
  12. Devine MJ, et al. 2011. Nat Commun. 1.263888889. PubMed
AB_1089240 (BioLegend Cat. No. 330702)

Antigen Details

Mucin-like protein, CD34 family member, 200-240 kD

embryonic stem cells (ESC), embryonic germ cells (EG), embryonal carcinoma cells

Cell Type
Embryonic Stem Cells
Biology Area
Cell Biology, Immunology, Stem Cells
Antigen References

1. Andrews PW, et al. 1984. Hybridoma. 3:347.
2. Schopperle WM and Dewolf WC. 2007. Stem Cells. 25:723.
3. Takeda T, et al. 2000. Mol. Biol. Cell. 11:3219.

Gene ID
5420 View all products for this Gene ID
View information about TRA-1-81 on UniProt.org

Related FAQs

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Go To Top Version: 4    Revision Date: 01-21-2021

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, www.biolegend.com/ordering#license). BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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Toll-Free Phone: 1-877-Bio-Legend (246-5343) Phone: (858) 768-5800 Fax: (877) 455-9587

This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.

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