Mouse CTLA4 PicoKine® Quick ELISA Kit, Carrier-free

CTLA-4(Cytotoxic T-Lymphocyte Antigen 4), also known as CD152(Cluster of differentiation 152), is a protein receptor that down regulates the immune system. CTLA4 is a member of the immunoglobulin superfamily, which is expressed on the surface of Helper T cells and transmits an inhibitory signal to T cells. CTLA4 is similar to the T-cell co-stimulatory protein, CD28, and both molecules bind to CD80 and CD86, also called B7-1 and B7-2 respectively, on antigen-presenting cells. CTLA4 transmits an inhibitory signal to T cells, whereas CD28 transmits a stimulatory signal. Blockade of CTLA4 expression in vitro augmented HIV-specific CD4-positive T-cell function.

<h2>Reproducibility</h2><p style="line-height: 0.4;"></p><p>To assay reproducibility, three samples with differing target protein concentrations were assayed using four different lots.</p><table cellpadding="3"><tr><th>Lots</th><th>Lot 1 (pg/ml)</th><th>Lot 2 (pg/ml)</th><th>Lot 3 (pg/ml)</th><th>Lot 4 (pg/ml)</th><th>Mean (pg/ml)</th><th>Standard Deviation</th><th>CV (%)</th></tr><tr><td>Sample 1</td><td>88</td><td>91</td><td>95</td><td>99</td><td>93</td><td>3.08</td><td>3.3%</td></tr><tr><td>Sample 2</td><td>302</td><td>299</td><td>240</td><td>274</td><td>279</td><td>13.66</td><td>4.9%</td></tr><tr><td>Sample 3</td><td>874</td><td>726</td><td>864</td><td>791</td><td>814</td><td>42.32</td><td>5.2%</td></tr></table>*number of samples for each test n=16.

Description|Quantity|Volume Anti-tag Pre-coated 96-well Strip Microplate|1|12 strips of 8 wells Standard||2 Antibody A|1|3ml Antibody B|1|3ml Sample Diluent|1|15ml TBS-T Wash Buffer (25x)|1|12ml Color Developing Reagent (TMB)|1|10ml Stop Solution|1|10ml Adhesive Plate Sealers|2|Piece