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Immunofluorescent analysis of TRA-1-81 using anti-TRA-1-81 monoclonal antibody (Product# MA1-024) shows expression in human teratocarcinoma NCCIT cells (shown in green) but not in negative control HeLa cells. Formalin fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 10 minutes at room temperature. Cells were blocked with 1% Blocker BSA (Product #37525) for 15 minutes at room temperature. Cells were probed with a mouse monoclonal antibody recognizing TRA-1-81 (Product# MA1-024), at a dilution of 1:50 for at least 1 hour at room temperature. Cells were washed with PBS and incubated with goat-anti-mouse IgM secondary antibody at a dilution of 1:400 for 30 minutes at room temperature. Nuclei (blue) were stained with Hoechst 33342 dye (Product# 62249). Images were taken on a Thermo Scientific ArrayScan at 20X magnification.
|Tested species reactivity||Human|
|Host / Isotype||Mouse / IgM|
|Immunogen||human embryonal carcinoma cell line 2102Ep|
|Purification||Affinity chromatography - MBP|
|Storage buffer||PBS with 1mg/ml BSA|
|Contains||0.05% sodium azide|
|Storage Conditions||-20° C, Avoid Freeze/Thaw Cycles|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||0.4 µg|
|Immunofluorescence (IF)||1:100 - 1:500|
|Western Blot (WB)||1:1000 - 1:5000|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
MA1-024 has been successfully used in Western blot, flow cytometry, and immunofluorescence applications on human samples.
TRA-1-81 is a cell surface antigen expressed along with SSEA-3, SSEA-4 and TRA-1-60 in human embryonic stem cells, embryonal carcinoma cells and induced pluripotent stem cells (iPS). These surface markers are down-regulated during the differentiation process. In contrast, SSEA-1 is absent in undifferentiated human stem cells but is present on the cell surface after retinoic acid mediated differentiation.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.