Description: The monoclonal antibody B34D1.3 recognizes human podocalyxin, a protein expressed on undifferentiated human embryonic stem cells (ES), embryonic carcinoma cells (EC), and embryonic germ cells (EG). Podocalxyin is a heavily glycosylated cell adhesion protein with homology to CD34 and endoglycan. It was first identified on kidney podocytes, and then found to be upregulated in a variety of human cancers such as breast and prostate cancer. Like other stem cell-specific markers, the epitope recognized by the B34D1.3 antibody is lost upon cell differentiation.
The B34D1.3 antibody recognizes the ectodomain of podocalyxin, which is a different epitope from the Tra-1-60 and Tra-1-81 monoclonal antibodies. While Tra1-60 has been found to react with a sialidase-sensitive epitope, the epitope recognized by Tra1-81 has not been fully defined.