Invitrogen™ CD28 Recombinant Mouse Monoclonal Antibody (CD28.2), Alexa Fluor™ Plus 555, Invitrogen™

Catalog No.	Quantity
50-252-7916	20 μL
74-000-9MP555	50 μL

Catalog No. 50-252-7916 Supplier Invitrogen™ Supplier No. 740009MP55520UG

Description

Mouse Recombinant Monoclonal Antibody

Alexa Fluor™ Plus recombinant antibodies are conjugated using new, proprietary dye chemistry so you can generate stunning data. Alexa Fluor™ Plus antibodies represent an advancement in fluorescent conjugate technology. Alexa Fluor™ Plus antibodies provide brighter signal compared to leading Alexa Fluor antibodies, providing you with better signal-to-noise for your critical experiments. These antibodies show better specificity and lot-to-lot consistency as these are recombinant antibodies, generated by cloning specific genes for the desired antibodies into an expression vector and expressed in vitro. Using conjugate solutions: Centrifuge the protein conjugate solution briefly in a microcentrifuge before use; add only the supernatant to the experiment. This step will help eliminate any protein aggregates that may have formed during storage, thereby reducing nonspecific background staining. Applications Tested: This CD28.2 antibody has been tested by flow cytometric analysis of human PBMCs. This may be used at less than or equal to 0.25 ug per test. A test is defined as the amount (ug) of antibody that will stain a cell sample in a final volume of 100 uL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest. Excitation: 553 nm; Emission: 568 nm; Laser: Yellow Laser Filtration: 0.2 um post-manufacturing filtered.

CD28 antigen is a 44 kDa disulfide linked homodimeric T cell specific surface glycoprotein. CD28 is a cell adhesion molecule of the immunoglobulin superfamily which is constitutively expressed on most peripheral blood T lymphocytes. Moreover, CD28 is the critical T cell costimulatory receptor that provides the cell the important second activation signal by binding CD80 and CD86 which are expressed by antigen presenting cells. In addition to its co-stimulation role, CD28 functions by preventing T cells from entering an anergic-hyporesponsive state or from undergoing premature apoptotic cell death. In murine peripheral lymphoid organs and in the blood, all CD4+ and CD8+ T cells express CD28. In the thymus, CD28 expression is highest on immature CD3-, CD8+ and CD4+8+ cells, and on CD4-8- cells that express alpha/beta and gamma/delta TCR. The level of CD28 on mature CD4+ and CD8+ alpha/beta TCR+ thymocytes is two- to fourfold lower than on the immature cells. Diseases associated with CD28 dysfunction include mycosis fungiodes and Sezary's Disease.

Specifications

• Antigen: CD28
• Applications: Flow Cytometry
• Classification: Recombinant Monoclonal
• Clone: CD28.2
• Concentration: 1.0 mg/mL
• Conjugate: Alexa Fluor Plus 555
• Formulation: Proprietary buffer with 0.008% Bromonitrodioxane, 0.008% Methylisothiazolone; pH 6.5
• Gene: Cd28
• Gene Accession No.: P10747
• Gene Alias: antigen CD28; CD28; CD28 antigen; CD28 antigen (Tp44); CD28 isoform; CD28 isoform 2; Cd28 molecule; CD28 precursor protein; CD28 protein; CD28 protein precursor; CD28RNA; cell surface protein; CHT28; contains partial extracellular domain; costimulatory molecule B7 receptor CD28; EGK_04709; MGC138290; sCD28; soluble CD28; T44; T-cell costimulatory molecule CD28; T-cell costimulatory molecule Tp44; T-cell-specific surface glycoprotein CD28; T-cell-specific surface glycoprotein CD28 homolog; TP44
• Gene Symbols: Cd28
• Host Species: Mouse
• Purification Method: Protein A/G
• Quantity: 20 μL
• Regulatory Status: RUO
• Primary or Secondary: Primary
• Gene ID (Entrez): 940
• Target Species: Human
• Content And Storage: 4°C, store in dark, DO NOT FREEZE!
• Product Type: Antibody
• Form: Liquid
• Isotype: IgG1 κ