Anti-TCR, alpha, beta, V beta2 (T Cell Receptor), PE/Cy5 conjugated, clone 5K83

This antibody precipitates a CD3-associated heterodimer of Mr 88kD (two bands of Mr 48kD and 40kD upon reduction) on chicken peripheral blood T cells.1,2 Deglycosylation of the heterodimer yields two polypeptides of Mr 34kD and 31kD from antibody precipitates. In the chicken, two distinct subpopulations of alpha/beta T cells appear in the thymus subsequent to the appearance of gamma/delta T cells. These subpopulations, originally denoted as TCR2 and TCR3,1,2 arise sequentially in the thymus during ontogeny and are now known to represent two distinct Vbeta families, Vb1 and Vb2, respectively. Two-color immunofluorescence has revealed that the TCR3+ thymocytes include CD4+CD8-, CD4-CD8+, CD4+CD8+ and CD4-CD8- subpopulations. The TCR3+ thymocytes can be separated into two subsets. One subset is characterized by relatively low levels of expression of the TCR3/CD3 complex and most of the cells in this subset are CD4+CD8+. Cells in the other subset express TCR3/CD3 in higher density and are either CD4+CD8- or CD4-CD8+, corresponding to the more mature medullary subset of thymocytes. The TCR3+ cells in the blood and spleen express relatively high levels of the TCR3/CD3 receptor complex and are "single positive, with CD4+CD8- cells being four times more frequent that the CD4-CD8+ cells (ca. 80% CD4+ vs ca. 20% CD8+).1,2, Applications:  Flow cytometry 1,2,  Immunohistochemistry (acetone-fixed, frozen sections) 3,  In ovo suppression of the development of TCR-Vb2 cells 3,5, Recommended Dilution: Flow Cytometry: < 0.2ug/10e6 cells, Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot and add glycerol (40-50%). Store at -20°C or colder. Aliquots are stable for at least 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer., , PE/CY5 combination conjugate is used as a third fluorochrome in multicolor flow cytometry applications when only a single 488nm excitation source is available. Antibodies are covalently coupled using heterobifunctional linking reagents, resulting in an optimal conjugation format for flow cytometry.