Alexa Fluor® 647 anti-human TRA-1-81 Antibody

Pricing & Availability
TRA-1-81 (See other available formats)
Other Names
Mouse IgM, κ
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Product Citations
NCCIT (human teratocarcinoma cell line) stained with TRA-1-81 Alexa Fluor® 647
  • Tra-1-81_A647_102108.jpg
    NCCIT (human teratocarcinoma cell line) stained with TRA-1-81 Alexa Fluor® 647
See Alexa Fluor® 647 spectral data
Cat # Size Price Save
330705 25 tests ¥28,000
330706 100 tests ¥55,000

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

Product Details

Antibody Type
Host Species
Human embryonic carcinoma cell line 2102Ep cl.2A6
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and 0.2% (w/v) BSA (origin USA).
The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 647 under optimal conditions.
Lot-specific (please contact technical support for concentration and total µg amount, or use our Lookup tool if you have a lot number.)
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

FC - Quality tested
ICC - Verified

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 5 µl per million cells in 100 µl staining volume or 5 µl per 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.

* Alexa Fluor® 647 has a maximum emission of 668 nm when it is excited at 633nm / 635nm.

Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.

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Excitation Laser
Red Laser (633 nm)
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

(PubMed link indicates BioLegend citation)
  1. Andrews PW, et al. 1984. Hybridoma. 3:347.
  2. Schopperle WM and Dewolf WC. 2007. Stem Cells. 25:723.
Product Citations
  1. Slamecka J, et al. 2017. Cell Cycle. 17:330. PubMed
  2. Howden S et al. 2019. Stem Cell Res. 1728:53:00 . PubMed
  3. Hosseini Far H et al. 2019. Stem Cell Res. 1727:49:00 . PubMed
  4. Maguire JA et al. 2019. Stem Cell Res. 1723:21:00 . PubMed
  5. Vlahos K et al. 2018. Stem cell research. 1723:40:00 . PubMed
  6. Gagne AL et al. 2018. Stem cell research. 31:157-160 . PubMed
  7. Bozaoglu K, et al. 2020. Stem Cell Research. 39:101516.. PubMed
  8. V ölkner C, et al. 2020. Stem Cell Research. 41:101606.. PubMed
AB_1089245 (BioLegend Cat. No. 330705)
AB_1089242 (BioLegend Cat. No. 330706)

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

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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, 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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