You Searched For: OPTEM

Catalog Number: (101442-750)

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.

Catalog Number: (101442-952)

Supplier: Southern Biotechnology

Description: CD13, also known as aminopeptidase N, is a 150 kDa type II integral membrane glycoprotein. It is expressed on granulocytes, monocytes and their precursors, and on mast cells. CD13 is a zinc-binding metalloprotease that is involved in cell surface antigen presentation via its digestion of many MHC-bound regulatory peptides.

Catalog Number: (101442-890)

Supplier: Southern Biotechnology

Description: c-Kit is a 145 kDa transmembrane receptor-type protein tyrosine kinase encoded by the c-Kit proto-oncogene and is the receptor for stem cell factor (SCF). c-Kit acts to regulate a variety of biological responses including cell proliferation, apoptosis, chemotaxis, and adhesion. The amino acid sequence of chicken c-kit shows 63% identity to mouse c-Kit and exhibits similar expression patterns in RNA blot analysis suggesting similar biological roles.

Catalog Number: (101442-922)

Supplier: Southern Biotechnology

Description: CD49b, a member of the integrin family of extracellular matrix and cell adhesion molecules, is the integrin α2 chain. CD49b associates noncovalently with CD29, the integrin β1 subunit, to form the heterodimer integrin α2β1 that binds laminin and collagen. It is expressed on B and T lymphocytes, NK cells, monocytes, platelets, fibroblasts, and long-term cultured T cells. CD49b/CD29 mediates the Mg++-dependent adhesion of platelets to collagen. It may also be utilized by fibroblasts for the reorganization of the collagen matrix during wound healing.

Catalog Number: (100243-592)

Supplier: Southern Biotechnology

Description: CD62L, also known as L-selectin, is a type I transmembrane glycoprotein with lectin-like and epidermal growth factor-like domains. It binds to sialylated oligosaccharide determinants on high endothelial venules (HEV) in peripheral lymph nodes. In the mouse, CD62L is expressed on most thymocytes and on peripheral leukocytes, including B and T lymphocytes, neutrophils, monocytes, and eosinophils. This member of the selectin family of cell adhesion molecules appears to be required for lymphocyte homing to peripheral lymph nodes and for leukocyte extravasation at sites of inflammation. Expression of CD62L on lymphocytes and neutrophils is rapidly down-regulated upon cell activation and the level of CD62L expression, along with other markers, distinguishes naive T cells from effector/memory T cells. The monoclonal antibody MEL-14 blocks in vitro binding of lymphocytes to peripheral lymph node HEV and inhibits in vivo lymphocyte extravasation into peripheral lymph nodes and the late stages of leukocyte rolling.

Catalog Number: (100244-314)

Supplier: Southern Biotechnology

Description: Goat Anti-Human IgA-TRITC antibody for use in immunohistochemistry / immunocytochemistry assays.

Catalog Number: (100244-228)

Supplier: Southern Biotechnology

Description: Goat F(ab')2 Anti-Human IgM-FITC antibody for use in flow cytometry and immunocytochemistry assays.

Catalog Number: (100243-586)

Supplier: Southern Biotechnology

Description: CD54, a member of the immunoglobulin superfamily of cell surface receptors and also known as Intercellular Adhesion Molecule-1 (ICAM-1), is a type I transmembrane glycoprotein that mediates important cell/cell interactions. CD54 is expressed on endothelial cells, dendritic cells, keratinocytes, and lymphocytes. Its expression is upregulated by inflammatory mediators such as IFN γ, IL-1, TNF-α, lipopolysaccharide, and phorbol esters. Endothelial CD54 contributes to the extravasation of leukocytes from blood vessels, particularly in areas of inflammation. CD54 on antigen-presenting cells contributes to antigen-specific T-cell activation, presumably by enhancing interactions between T cell and antigen-presenting cells. These adhesion reactions are mediated via the binding of CD54 to its major ligands, LFA-1 and Mac-1.

Catalog Number: (100245-520)

Supplier: Southern Biotechnology

Description: FITC Anti-Chicken IgY antibody for use in flow cytometry and immunohistochemistry / immunocytochemistry assays.

Catalog Number: (100245-830)

Supplier: Southern Biotechnology

Description: PE Anti-Human IgG3 Hinge antibody for use in flow cytometry and multiplex assays.

Catalog Number: (100245-622)

Supplier: Southern Biotechnology

Description: In the chicken the CD8 molecule is present in two forms - (i) a homodimer of two α chains and (ii) a heterodimer of an α chain and a β chain. Chicken CD8 is expressed on approximately 80% of thymocytes, 45% of blood mononuclear cells, and 50% of spleen cells but less than 1% of cells in the bursa and bone marrow. While the vast majority of CD8+ cells in the thymus, spleen, and blood of adult chickens express both CD8α- and CD8β-chains, a relatively large proportion of the CD8+ TCRγδ cells in the spleens of embryos and young chicks express only the α-chain of CD8. Among intestinal epithelial lymphocytes, the major CD8+ T cell populations present in mice are conserved but there is a population of TCRγδ CD8αβ cells in the chicken that is not found in rodents. The monoclonal antibody 3-298 recognizes the CD8α chain of both the chicken and turkey.

Catalog Number: (100246-306)

Supplier: Southern Biotechnology

Description: CD51 represents the integrin αV chain that associates with integrin β3 (CD61) to form the CD51/CD61 vitronectin receptor on endothelial cells, certain activated leukocytes, NK cells, macrophages, neutrophils, and platelets. CD51 is the most promiscuous integrin α subunit as it can form heterodimers with the β1 (CD29), β3 (CD61), β5, β6 and β8 subunits in various tissues. CD51/CD61 acts as an activation-independent receptor for platelet attachment and spreading on vitronectin and other RGD-containing proteins including matrix components. It also mediates leukocyte-endothelial cell adhesion via interaction with CD31.

Catalog Number: (100245-656)

Supplier: Southern Biotechnology

Description: AP Anti-Human IgM antibody for use in ELISA and western blotting assays.

Catalog Number: (100245-630)

Supplier: Southern Biotechnology

Description: ChT1, a member of the Ig superfamily with one V-like and one C2-like domain, is a T cell antigen that is expressed on the surface of embryonic thymocytes (day 10). In young chickens about 90% of the thymocytes as well as a subpopulation of peripheral lymphocytes, which represent recent thymic emigrants are ChT1 positive. Expression in the periphery declines with age and, in correlation with partial thymectomy, indicates that ChT1 can be used as an accurate marker for studying thymic function. The monoclonal antibody CT1 also recognizes the ChT1 antigen in quail cortical thymocytes.

Catalog Number: (100246-376)

Supplier: Southern Biotechnology

Description: CD79 is a disulfide-linked heterodimer composed of an α chain (CD79a) and a β chain (CD79b) that associates non-covalently with membrane immunoglobulin to form the B cell receptor (BCR) complex. Its expression is restricted to B lymphocytes first appearing on the surface at the pro-B cell stage and remaining through all stages of B cell differentiation prior to plasma cells. Crosslinking of the BCR leads to B cell activation. The monoclonal antibody CB3-1 reacts with the β chain of CD79.

Catalog Number: (100245-356)

Supplier: Southern Biotechnology

Description: Chicken Native Neutralite Avidin (from Egg White), Texas Red®