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Catalog Number: (103265-384)

Supplier: Southern Biotechnology

Description: CD33 is a 67 kDa type I transmembrane glycoprotein and a member of the sialoadhesin family of cell surface receptors. It is absent from pluripotent stem cells but appears on myelomonocytic precursors after CD34. It then continues to be expressed on both the myeloid and monocyte lineages. While it has been reported that CD33 can function as a sialic acid-dependent cell adhesion molecule, cells expressing CD33 require desialylation before they can bind cells bearing the appropriate sialoglycoconjugates. This suggests that inhibitory cis interactions may regulate or block any adhesion function.

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Catalog Number: (100245-472)

Supplier: Southern Biotechnology

Description: Chicken CD28 antigen is a type I transmembrane monomeric glycoprotein which does not contain the cysteine residues that form disulfide-linked covalent homodimers found in the mammalian counterpart. This may reduce the avidity of binding to individual ligand molecules expected to be present on antigen presenting cells. Peripheral γδ+ T cells are CD28 negative. Monoclonal antibodies against CD28 have a costimulatory effect on T cells stimulated by phorbol myristate acetate (PMA), concanavalin A, or monoclonal antibodies against the avian T cell receptor (TCR). Both Vβ1- and Vβ2-expressing cells respond equally well to stimulation with anti-CD28 in combination with PMA. These responses are resistant to cyclosporin A but inhibited by herbimycin A suggesting that CD28 employs a signaling pathway at least partly distinct from that triggered by TCR/CD3. The monoclonal antibody AV7 also reacts with turkey CD28 as demonstrated by flow cytometry.

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Catalog Number: (103264-692)

Supplier: Southern Biotechnology

Description: FITC Anti-Hamster IgG1 antibody for use in flow cytometry assays.

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Catalog Number: (100243-492)

Supplier: Southern Biotechnology

Description: CD40 is a type I cell surface protein belonging to the tumor necrosis factor superfamily of cell surface receptors. In mice it is expressed on B lineage cells, follicular dendritic cells, thymic epithelium, and interdigitating cells in the T-cell zone of secondary lymphoid organs. CD40 first becomes detectable on a subset of small pre-B II cells in bone marrow with the levels of CD40 expression increasing thereafter during B cell maturation. Immature B cells (IgM+IgDloB220lo) express intermediate levels of CD40, whereas mature B cells (IgM+IgDhiB220hi) express high levels. CD40 has a central role in B cell growth and differentiation, and signaling through CD40 in combination with IL-4 reportedly induces immunoglobulin isotype switching and secretion of IgE. The agonistic 1C10 antibody closely resembles gp39/CD40 ligand in its ability to stimulate proliferation of small, resting B lymphocytes in the absence of other cofactors.

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Catalog Number: (100245-690)

Supplier: Southern Biotechnology

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

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Catalog Number: (100243-632)

Supplier: Southern Biotechnology

Description: Murine CD72.1 (Lyb-2.1), a type II integral membrane glycoprotein and a member of the C-lectin family of cell surface receptors, is a differentiation antigen of B cells and is found in mouse strains expressing the Lyb-2.1 allotype. CD72.1 is the ligand of CD5 which is distributed on all T cells and a small number of B cells. The 10.1.D2 monoclonal antibody blocks binding of CD5 to CD72 on the B cell surface which leads to inhibition of the positive signal resulting from CD5/CD72 pairing. However, 10.1.D2 can itself trigger a positive signal by binding CD72.

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Catalog Number: (103259-974)

Supplier: Southern Biotechnology

Description: CD103 is a member of the integrin series of adhesion molecules. This antigen defines a developmentally important subset of T cells, namely mucosal T cells including all IEL (intraepithelial lymphocytes) and ~20% of lamina propria T cells. Expression of CD103 is more restricted outside these mucosal organs appearing at lower levels on T cell subsets of the lymph node, dendritic epidermis, and periphery. In non-epithelial CD103+ T cells there is a bias toward expression on CD8+ cells. The 2E7 monoclonal antibody exhibits antigen immunoprecipitation patterns similar if not identical to the rat anti-mouse CD103 monoclonal antibody M290. 2E7 is reported to have signal-inducing activity in a redirected lysis assay and to costimulate IEL and CD8+ lymph node cells in conjunction with anti-TCR in vitro which runs counter to the usual inhibition of CTL by anti-integrins. This costimulatory activity is also shared by the monoclonal antibody M290. The property of costimulation is not unique to the mouse since the combination of anti-human αIEL plus anti-TCR will produce similar proliferation in human cells with the exception that CD8+ cells are not stimulated.

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Catalog Number: (103259-752)

Supplier: Southern Biotechnology

Description: Low Endotoxin/Azide Free Human IgG1 Lambda for use as a standard in ELISA.

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Catalog Number: (100245-246)

Supplier: Southern Biotechnology

Description: Sheep Anti-FITC-Biotin for use in ELISA, flow cytometry, and immunohistochemistry assays.

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Catalog Number: (103259-784)

Supplier: Southern Biotechnology

Description: Goat Anti-Mouse IgG2a-FITC antibody for use in immunohistochemistry / immunocytochemistry and western blotting assays.

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Catalog Number: (100245-258)

Supplier: Southern Biotechnology

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

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Supplier: Southern Biotechnology

Description: Goat Anti-Mouse IgG1-APC antibody with minimal reactivity to human proteins for use in flow cytometry assays.

Catalog Number: (100242-240)

Supplier: Southern Biotechnology

Description: ApoScreen® Annexin V (SB Cat. No. 10040) is a recombinant protein that is expressed in E. coli. A number of changes in cell structure occur during apoptosis. One major change is the loss of membrane phospholipid asymmetry, with translocation of phosphatidylserine (PS) from the inner leaflet of the phospholipid bilayer to the external surface. Annexin V, a member of the annexin family of calcium-dependent phospholipid binding proteins, has a high affinity for phosphatidylserine (PS)-containing phospholipid bilayers. Conjugated Annexin V can be used to monitor changes in cell membrane phospholipid asymmetry, thereby providing a convenient tool for detection of apoptotic cells.

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Catalog Number: (103259-828)

Supplier: Southern Biotechnology

Description: Goat Anti-Mouse IgG3-PE/CY7 antibody with minimal reactivity to human proteins for use in flow cytometry assays.

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Catalog Number: (100244-570)

Supplier: Southern Biotechnology

Description: Low Endotoxin/Azide Free Goat F(ab')2 Anti-Rat IgG antibody with minimal reactivity to mouse proteins for use in ELISA, flow cytometry, and immunohistochemistry assays.

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Catalog Number: (103264-658)

Supplier: Southern Biotechnology

Description: The “classical” MHC Class I molecules are histocompatibility antigens encoded by the H-2 gene complex and consist of heterodimers of highly polymorphic α chains noncovalently associated with the invariant β2-microglobulin. These antigens are expressed on most nucleated cells but expression varies on different cell types. MHC Class I molecules present endogenously synthesized peptides to CD8+ T lymphocytes which are usually cytotoxic T cells. MHC Class I antigens expressed on thymic epithelial cells regulate the positive and negative selection of CD8+ T cells during T cell ontogeny. The monoclonal antibody 28-14-8 binds to the α3 domain of H-2Db in the presence or absence of β2 microglobulin. It cross reacts with the α3 domain of H-2Ld, but not Kd or Dd, and with H-2Dq and/or Lq. The antibody has been shown to block H-2Ld-specific and H-2Ld-restricted antigen-specific lysis of target cells by cytotoxic T lymphocytes but it does not block recognition of H-2Ld-positive target cells by Ly-6G2-positive NK cells.

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