BD human CD8抗體 Clone RPA-T8
BD human CD8抗體 Clone RPA-T8
Alternative Name：CD8α; CD8A; CD8 alpha; Leu2; MAL; T8; p32
BD human CD8抗體 Clone RPA-T8
Reactivity
Human (QC Testing) Rhesus, Cynomolgus, Baboon (Tested in Development)
Application
Flow cytometry (Routinely Tested)
Immunogen
Human CD8a
Workshop No.
IV T171; V T-CD08.03; VI 6T-CD8.1, 6T-081
Storage Buffer
Aqueous buffered solution containing BSA and ≤0.09% sodium azide.
The RPA-T8 monoclonal antibody specifically binds to CD8 alpha (CD8α) . CD8α is a type I transmembrane glycoprotein and a member of the immunoglobulin superfamily. CD8α is expressed by the majority of thymocytes, by subpopulations of αβ T cells and γδ T cells and by some NK cells. Cell surface CD8α is expressed either as a disulfide-linked homodimer (CD8αα) or as a heterodimer (CD8αβ) when disulfide-bonded to a CD8 beta chain (CD8β) . CD8-positive αβ T cells coexpress both CD8αα homodimers and CD8αβ heterodimers whereas some γδ T cells and NK cells express CD8αα homodimers. CD8 plays important roles in T cell activation and selection. The extracellular IgSF domain of CD8 α binds to a non-polymorphic determinant on HLA class I molecules (α3 domain) and enables CD8 to function as a co-receptor with MHC class I-restricted TCR during T cell recognition of antigen. The cytoplasmic domain of CD8α associates with Lck, a Src family protein tyrosine kinase that is involved in intracellular signaling. The RPA-T8 and HIT8a monoclonal antibodies are not cross-blocking. This clone has been reported to react with a subset of peripheral blood lymphocytes, but not monocytes nor granuloyctes, of baboon and both rhesus and cynomolgus macaque monkey. In general, a higher frequency of CD8+ and CD4+CD8+ lymphocytes are observed in non-human primates compared to normal human donors.
Format
FITC
Excitation Source
Blue 488 nm
Excitation Max
494 nm
Emission Max
520 nm
FITC, fluorescein isothiocyanate, is a fluorochrome with a molecular weight of 389 Da. FITC is sensitive to pH changes and photobleaching. Due to nearly identical excitation and emission properties but different spillover characteristics, FITC and Alexa Fluor® 488 cannot be used simultaneously. FITC is relatively dim and should be reserved for highly expressed markers whenever possible.
| Cat No. | Description | Size | |
|---|---|---|---|
| 555748 | FITC Mouse IgG1, κ Isotype Control RUO | 100 Tests |
Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated with FITC under optimum conditions, and unreacted FITC was removed.
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