Cd28 Mouse Monoclonal Antibody [Clone ID: E18]

CAT#: SM2266F

Cd28 mouse monoclonal antibody, clone E18, FITC

Specifications

Product Data

• Clone Name: E18
• Applications: FC
• Recommended Dilution: Flow Cytometry: neat - 1/5; use 10 µl of the suggested working dilution to label 106 cells in 100 µl.
• Reactivities: Mouse
• Host: Mouse
• Isotype: IgG2b
• Clonality: Monoclonal
• Immunogen: Alternate immunisation with A20 cells expressing mCD28 and recombinant mCD28Ig. Spleen cells from immunised CD28-/-knockout mice were fused with cells of the X63Ag8.653 myeloma cell line.
• Specificity: This antibody recognises CD28, a co-stimulatory cell surface molecule expressed by T cell subsets. Clone E18 has been shown to be able to stimulate murine T lymphocytes in combination with anti-mouse CD3.
• Formulation: PBS, pH7.4 containing 0.09% Sodium Azide and 1% Bovine Serum Albumin
  Label: FITC
  State: Liquid purified IgG
  Label: Fluorescein Isothiocyanate Isomer 1
• Concentration: 0.1 mg/ml
• Purification: Affinity chromatography on Protein G
• Conjugation: FITC
• Gene Name: CD28 antigen
• Database Link:
  Entrez Gene 12487 Mouse
• Background: Human CD28 antigen is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein. It is a cell adhesion molecule of the immunoglobulin superfamily which is constitutively expressed on most peripheral blood T lymphocytes (approximately 95% of CD4+ cells and 50% of CD8+ cells). Mature thymocytes exhibit higher levels of CD28 than the immature cells. Activation of T cells results in enhanced CD28 expression. T cell activation requires two combined signals provided by antigen presenting cells. The first is mediated via the T cell receptor following its interaction with antigenic peptide MHC complexes, and the second is delivered by accessory or costimulating molecules through their counter receptors on T lymphocytes. CD28 bears structural homology to CTLA 4 which is expressed at very low levels on the surface of CD4+ and CD8+ peripheral blood cells only following activation. CD28 is the natural receptor for the B7/BB 1 ligand (CD80) a 55-60 kDa glycoprotein which is expressed on activated B lymphocytes, on dendritic cells and on interferon gamma treated monocytes. The binding of B7 1/BB 1 molecules to CD28 is involved in T lymphocyte activation and in the initiation and maintenance of chronic inflammation.
• Synonyms: TP44