TRA-1-81 (Podocalyxin) Monoclonal Antibody (TRA-1-81), PE, eBioscience™, Invitrogen™

Description

• Description: The TRA-1-81 antibody recognizes a protein expressed on undifferentiated human embryonic stem cells (ES), embyronal carcinoma cells (EC), and embryonic germ cells (EG)
• Like other stem cell specific markers, the epitope recognized by the TRA-1-81 antibody is lost upon cell differentiation
• The TRA-1-81 epitope is resistant to neuraminidase digestion, unlike the epitope recognized by the related TRA-1-60 antibody
• The TRA-1-81 antibody is known to specifically recognize a carbohydrate epitope on a keratan sulfated glycoprotein recently identified as podocalyxin, a member of the CD34-related family of sialomucins
• Podocalyxin is a transmembrane glycoprotein originally identified on epithelial glomerular cells known as podocytes, and the protein has also been implicated in the development of aggressiveness in a variety of cancers, including breast and prostate cancer
• Applications Reported: This TRA-1-81 antibody has been reported for use in flow cytometric analysis
• Applications Tested: This TRA-1-81 antibody has been tested by flow cytometric analysis of the human embryonal carcinoma (EC) line 2102Ep
• This can be used at less than or equal to 1 μg per test
• A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL
• Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test
• 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.