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CD28 Antibody (740009MP555) in Flow
CD28 expression was assessed within CD19 negative (CD19-) and CD19 positive (CD19+) subsets of human PBMCs by staining the cells with CD19 eFluor™ 450 (Product # 48-0199-42) and 0.25 µg of CD28 Recombinant Mouse Monoclonal Antibody (CD28.2), Alexa Fluor™ Plus 555 (Product # 740009MP555). Specific CD28 staining was observed in CD19- subset (pink histogram) while negligible CD28 staining was seen in the CD19+ subset (blue histogram). Viable cells in the lymphocyte gate were used for analysis, as determined by LIVE/DEAD™ Fixable Far Red Dead ... View More
Product Details
740009MP555
Product Specifications
Species Reactivity
Human
Host/Isotype
Mouse
/ IgG1, kappa
Expression System
Expi293
Class
Recombinant Monoclonal
Type
Antibody
Clone
CD28.2
Conjugate
Excitation/Emission Max
558/572 nm
View spectra
Form
Liquid
Concentration
1.0 mg/mL
Purification
Protein A/G
Storage buffer
proprietary buffer, pH 6.5
Contains
0.008% Bromonitrodioxane, 0.008% Methylisothiazolone
Storage conditions
4°C, store in dark, DO NOT FREEZE!
Shipping conditions
Wet ice
RRID
AB_3074185
Product Specific Information
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 µg per test. A test is defined as the amount (µg) of antibody that will stain a cell sample in a final volume of 100 µL. 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 µm post-manufacturing filtered.
Target Information
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.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
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Bioinformatics
Protein Aliases: CD28; CD28 antigen; MGC138290; sCD28; soluble CD28; T-cell-specific surface glycoprotein CD28; T44; TP44
Gene Aliases: CD28; Tp44
UniProt ID: (Human) P10747
Entrez Gene ID: (Human) 940
positive regulation of inflammatory response to antigenic stimulus
humoral immune response
cell surface receptor signaling pathway
positive regulation of gene expression
negative regulation of gene expression
regulation of phosphatidylinositol 3-kinase signaling
positive regulation of phosphatidylinositol 3-kinase signaling
T cell costimulation
positive regulation of interleukin-10 production
positive regulation of interleukin-4 production
cytokine biosynthetic process
positive regulation of T cell proliferation
negative thymic T cell selection
regulatory T cell differentiation
positive regulation of viral genome replication
positive regulation of interleukin-2 biosynthetic process
regulation of regulatory T cell differentiation
positive regulation of translation
positive regulation of mitotic nuclear division
positive regulation of transcription from RNA polymerase II promoter
positive regulation of alpha-beta T cell proliferation
phosphatidylinositol phosphorylation
phosphatidylinositol-mediated signaling
positive regulation of isotype switching to IgG isotypes
regulation of defense response to virus by virus
T cell receptor signaling pathway
positive regulation of protein kinase B signaling
apoptotic signaling pathway
Performance Guarantee
If an Invitrogen™ antibody doesn't perform as described on our website or datasheet,we'll replace the product at no cost to you, or provide you with a credit for a future purchase.*
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