Human CD28 ELISA Kit | CD28 elisa kit

Human CD28 PicoKine ELISA Kit

Cat. Num. AAA178525

• Gene Names: CD28; Tp44
• Reactivity: Human
• Synonyms: CD28; Human CD28 PicoKine ELISA Kit; CD 28; CD28 antigen; CD28 molecule; TP44; P10747; T-cell-specific surface glycoprotein CD28; CD28 elisa kit

• Reactivity: Human
• Specificity: Natural and recombinant Human CD28
• Sequence Length: 123

• Samples: Cell culture supernates, serum and plasma(heparin, EDTA).
• Assay Type: Sandwich
• Detection Range: 62.5pg/ml-4000pg/ml
• Sensitivity: <12pg/ml
• Intra-assay Precision: Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision.
• Inter-assay Precision: Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision.
• Preparation and Storage: Store at 4 degree C for 6 months, at -20 degree C for 12 months. Avoid multiple freeze-thaw cycles (Shipped with wet ice).

Typical Testing Data/Standard Curve (for reference only)

(Human CD28 PicoKine ELISA Kit standard curve )

Related Product Information for CD28 elisa kit

Principle of the Assay: Human CD28 ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. A monoclonal antibody from mouse specific for CD28 has been precoated onto 96-well plates. Standards(Expression system for standard: NSO; Immunogen sequence: N19-P152) and test samples are added to the wells, a biotinylated detection polyclonal antibody from goat specific for CD28 is added subsequently and then followed by washing with PBS or TBS buffer. Avidin- Biotin-Peroxidase Complex was added and unbound conjugates were washed away with PBS or TBS buffer. HRP substrate TMB was used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the Human CD28 amount of sample captured in plate.

Background/Introduction: CD28 (Cluster of Differentiation 28) is one of the proteins expressed on T cells that provide costimulatory signals required for T cell activation and survival. T cell stimulation through CD28 in addition to the T-cell receptor (TCR) can provide a potent signal for the production of various interleukins (IL-6 in particular). The CD28 gene is mapped to 2q33-q34. CD28 and CTLA-4, together with their ligands, B7-1 and B7-2, constitute one of the dominant costimulatory pathways that regulate T and B cell responses. CD28 and CTLA-4 are structurally homologous molecules that are members of the immunoglobulin (Ig) gene superfamily.

NCBI and Uniprot Product Information

• NCBI GI #: 340545508
• NCBI GeneID: 940
• NCBI Accession #: NP_001230006.1
• NCBI GenBank Nucleotide #: NM_001243077.1
• UniProt Accession #: P10747; Q13964; Q52M23; Q70WG0; Q8NI54; Q8NI55; Q8NI56; Q8WXJ2; Q9BYV0; A8KAC1
• Molecular Weight: 26,186 Da
• NCBI Official Full Name: T-cell-specific surface glycoprotein CD28 isoform 2
• NCBI Official Synonym Full Names: CD28 molecule
• NCBI Official Symbol: CD28
• NCBI Official Synonym Symbols: Tp44
• NCBI Protein Information: T-cell-specific surface glycoprotein CD28
• UniProt Protein Name: T-cell-specific surface glycoprotein CD28
• Protein Family: T-cell-specific surface glycoprotein
• UniProt Gene Name: CD28
• UniProt Entry Name: CD28_HUMAN

NCBI Description

The protein encoded by this gene is essential for T-cell proliferation and survival, cytokine production, and T-helper type-2 development. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jul 2011]

Uniprot Description

CD28: a type I plasma membrane protein Involved in T-cell activation, the induction of cell proliferation and cytokine production and promotion of T-cell survival. Binds to B7-1 and -2. Expressed in T cells and plasma cells, but not in less mature B cells. Six splice-variant isoforms have been described.

Protein type: Cell surface; Membrane protein, integral

Chromosomal Location of Human Ortholog: 2q33

Cellular Component: cell surface; cytosol; external side of plasma membrane; integral to plasma membrane; plasma membrane

Molecular Function: coreceptor activity; phosphatidylinositol-4,5-bisphosphate 3-kinase activity; protease binding; protein binding; SH3/SH2 adaptor activity

Biological Process: cell surface receptor linked signal transduction; cytokine biosynthetic process; humoral immune response; phosphoinositide-mediated signaling; positive regulation of interleukin-10 production; positive regulation of interleukin-2 biosynthetic process; positive regulation of interleukin-4 production; positive regulation of mitosis; positive regulation of T cell proliferation; regulation of defense response to virus by virus; regulation of phosphoinositide 3-kinase cascade; regulatory T cell differentiation; T cell costimulation