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Catalog Number: (100245-454)

Supplier: Southern Biotechnology

Description: The monoclonal antibody TCR-3 precipitates a CD3-associated heterodimer of Mr 88 kDa (two bands of Mr 48 kDa and 40 kDa upon reduction) on chicken peripheral blood T cells. Deglycosylation of the heterodimer yields two polypeptides of Mr 34 kDa and 31 kDa. In the chicken, two distinct subpopulations of αβ T cells appear in the thymus subsequent to the appearance of γδ T cells. These subpopulations, originally denoted as TCR-2 and TCR-3, arise sequentially in the thymus during ontogeny and are now known to represent two distinct Vβ families, Vβ1 and Vβ2, respectively. The TCR-3 monoclonal antibody reacts with approximately 9% of thymocytes, 15-25% of blood mononuclear cells, and 13% of splenocytes young adult chickens. Two-color immunofluorescence has revealed that the TCR-3+ thymocytes include CD4+CD8-, CD4-CD8+, CD4+CD8+, and CD4-CD8- subpopulations. The TCR-3+ thymocytes can be separated into two subsets. One subset is characterized by relatively low levels of expression of the TCR-3/CD3 complex and most of the cells in this subset are CD4+CD8+. Cells in the other subset express TCR-3/CD3 in higher density and are either CD4+CD8- or CD4-CD8+, corresponding to the more mature medullary subset of thymocytes. The TCR-3+] cells in the blood and spleen express relatively high levels of the TCR-3/CD3 receptor complex and are “single positive” with CD4+CD8- cells being four times more frequent that the CD4-CD8+ cells (~ 80% CD4+ vs ~ 20% CD8+).

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Catalog Number: (100245-654)

Supplier: Southern Biotechnology

Description: FITC Anti-Human IgM antibody for use in flow cytometry and western blotting assays.

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Catalog Number: (100243-718)

Supplier: Southern Biotechnology

Description: Ly-6A/E, also known as Sca-1, is a member of the Ly-6 multigene family of type V glycophosphatidylinositol-anchored cell surface proteins. It is expressed on multipotent hematopoietic stem cells in bone marrow of mice with both the Ly-6.1 and Ly-6.2 allotypes. In the periphery, Ly-6A/E exhibits a pattern of expression which is based on differences between the two allotypes. Ly-6.1 strains (e.g., A, BALB/c, CBA, C3H/He, DBA/1, NZB) have few Ly-6A/E+ resting peripheral lymphocytes whereas Ly-6.2 strains (e.g., AKR, C57BL, C57BR, C57L, DBA/2, PL, SJL, SWR, 129) have relatively high numbers of Ly-6A/E+ lymphocytes. The expression of Ly-6A/E is dramatically upregulated in all strains upon cellular activation. Studies with the monoclonal antibody D7 suggest that Ly-6A/E may be involved in B and T lymphocyte responses and it appears that the antigen may be required for T-cell receptor-mediated T-cell activation.

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Supplier: Southern Biotechnology

Description: The CD117 (c-Kit) antigen is the cell-surface receptor for stem cell factor (SCF). Together these molecules constitute a ligand/receptor pair which functions to maintain normal hematopoiesis in the adult. Signaling through SCF/c-Kit has an important role in stimulating myeloid and erythroid production of primitive hematopoietic progenitor cells. A variety of cytokines act synergistically with SCF to stimulate proliferation and differentiation of bone marrow progenitor cells. For example, SCF plus IL-7 can stimulate the combined myeloid and B cell differentiation of uncommitted hematopoietic progenitor cells. SCF/c-Kit also participates in erythropoiesis in both the bone marrow and spleen. Loss-of-function mutations for SCF/c-Kit lead to a variety of pleiotropic developmental defects while gain-of-function mutations can lead to constitutive activation of the kit receptor and links to cancer. Examples of the former are mast cell deficiency and severe macrocytic anemia while the latter mutation has been identified in mastocytomas.

Catalog Number: (100244-926)

Supplier: Southern Biotechnology

Description: Purified Rabbit F(ab')2 Anti-Sheep IgG(H+L) antibody for use in ELISA, flow cytometry, and immunohistochemistry assays.

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Catalog Number: (100245-250)

Supplier: Southern Biotechnology

Description: Purified Donkey Anti-Mouse IgG(H+L) antibody with minimal reactivity to human serum proteins for use in ELISA, flow cytometry, and immunohistochemistry / immunocytochemistry assays.

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Catalog Number: (100245-700)

Supplier: Southern Biotechnology

Description: Biotin Anti-Human IgG Fc antibody for use in ELISA, flow cytometry, western blotting, ELISpot, and multiplex assays.

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Catalog Number: (103259-690)

Supplier: Southern Biotechnology

Description: Rat IgG1-Alexa Fluor 488 for use as a control in flow cytometry and immunocytochemistry assays.

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Catalog Number: (100244-922)

Supplier: Southern Biotechnology

Description: Rabbit F(ab')2 Anti-Human IgG(H+L)-AP antibody with minimal reactivity to mouse proteins for use in ELISA assays.

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Catalog Number: (100245-612)

Supplier: Southern Biotechnology

Description: Chicken CD44 is a type I transmembrane glycoprotein expressed on many cell types including B cells, most T cells, monocytes, and some epithelial cells. CD44 primarily functions as an adhesion molecule. It has been implicated in various processes such as hematopoiesis, lymphocyte homing, leukocyte activation, tumor metastasis, and development. The monoclonal antibody AV6 also reacts with turkey peripheral blood mononuclear cells.

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Catalog Number: (100245-482)

Supplier: Southern Biotechnology

Description: Chicken CD45 is a transmembrane glycoprotein expressed on all leukocytes. B lineage cells in the bursa of Fabricius express the 215 kDa isoform while T lineage cells bear the 190 kDa variant. These high molecular weight molecules have intrinsic phosphotyrosine phosphatase activity characteristic of mammalian CD45. Levels of CD45 expression detected by the monoclonal antibody LT40 in the avian thymus are heterogeneous with approximately 90% of thymocytes expressing fourfold higher levels of surface CD45 (CD45hi) than do the remaining 10% (CD45low) of thymocytes. The CD45low population contains exclusively thymocytes with the CD3-CD4-CD8low phenotype characteristic of the immediate precursors to the CD3-CD4+CD8+ thymic population which are CD45hi. This shift from low to high levels of surface CD45 expression is concomitant with the transition from CD4-CD8low to CD4+CD8+ and before the expression of CD3. The ability of the monoclonal antibody LT40 to discriminate this CD45low subpopulation provides a suitable marker for the CD3-CD4-CD8low immediate precursors to the CD3-CD4+CD8+ thymocytes.

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Catalog Number: (103264-668)

Supplier: Southern Biotechnology

Description: The 3C4 monoclonal antibody reacts with the cell surface glycoprotein mouse CD102 (ICAM-2), a ligand for the leucocyte integrin CD11a/CD18 (LFA-1). CD102 is constitutively expressed on T cells, B cells, and at high levels on vascular endothelial cells. It is also expressed on a variety of leukocyte cell lines. The 3C4 antibody blocks the interaction between ICAM-2 and LFA-1.

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Catalog Number: (100243-320)

Supplier: Southern Biotechnology

Description: The CD23 antigen is the low affinity IgE Fc receptor, which is a 45-49 kDa protein with 38 and 28 kDa fragments. It is expressed on most mature, conventional B cells (but not on peritoneal CD5+ B cells) and can also be found on the surface of T cells, macrophages and platelets. It is distinct from the high affinity IgE receptors found on basophils and mast cells which mediate allergic reactions. The low affinity receptors are thought to play a role in isotype specific immunoregulation. The regulation of CD23 surface expression appears to be integral with the complex IgE system which involves interactions of cells, cytokines, antibodies and regulatory factors. CD23 has been described as a “membrane bound cytokine," in that the soluble cleavage products of CD23 are themselves able to act as cytokines in vitro.

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Catalog Number: (100242-740)

Supplier: Southern Biotechnology

Description: Goat Anti-Mouse IgG3-AP antibody with minimal reactivity to human proteins for use in ELISA, immunohistochemistry / immunocytochemistry, western blotting, and ELISpot assays.

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Catalog Number: (100244-808)

Supplier: Southern Biotechnology

Description: The monoclonal antibody 2C4 reacts with RLA-DQ-transfected cells, but not with RLA-DR-transfected cells. In normal adult rabbits, the antibody reacts with 30-60% of peripheral blood leukocytes. It has also been reported that the antibody stains lymphocytes and macrophages in the spleen, lymphocytes in the thymic medulla and some cells in the cortex, Kupffer cells in the liver, and synovial lining cells (e.g., infiltrating macrophages) in inflamed synovium. DQα transcripts have been detected in bone marrow and spleen and to a lesser extent in appendix, lymph nodes, and other organs.

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Catalog Number: (100246-546)

Supplier: Southern Biotechnology

Description: CD26, also known as dipeptidyl peptidase (DPP IV), is a 110 kDa type II integral membrane glycoprotein that is primarily expressed by CD3+ medullary thymocytes and peripheral T cells. CD26 is serine protease that is also associated with T cell activation and proliferation, cell to cell adhesion, and HIV infection.

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