Thermo Fisher Scientific CD8a Monoclonal Antibody (OKT8 (OKT-8)), Alexa Fluor 488, eBioscience

Applications

Tested Dilution

Publications

Immunocytochemistry (ICC/IF)

-

View 2 publications 2 publications

Flow Cytometry (Flow)

5 µL (0.06 µg)/test

View 22 publications 22 publications

Immunoprecipitation (IP)

-

View 1 publication 1 publication

Product Specifications

Species Reactivity

Human

Published species

Human

Host/Isotype

Mouse / IgG2a, kappa

Recommended Isotype Control

Mouse IgG2a kappa Isotype Control (eBM2a), Alexa Fluor™ 488, eBioscience™

Class

Monoclonal

Type

Antibody

Clone

OKT8 (OKT-8)

Conjugate

Alexa Fluor™ 488 Alexa Fluor™ 488 Alexa Fluor™ 488

View additional formats

• Unconjugated
• Alexa Fluor 532
• Alexa Fluor 700
• APC
• APC-eFluor 780
• Biotin
• eFluor 450
• FITC
• Functional Grade
• NovaFluor Blue 510
• NovaFluor Blue 555
• NovaFluor Blue 585
• NovaFluor Blue 610-70S
• NovaFluor Blue 660-120S
• NovaFluor Blue 690
• NovaFluor Blue 725
• NovaFluor Blue 760
• NovaFluor Blue 800
• NovaFluor Red 700
• NovaFluor Red 710
• NovaFluor Red 725
• NovaFluor Red 755
• NovaFluor UV 765
• NovaFluor Violet 690
• NovaFluor Violet 800
• NovaFluor Yellow 590
• NovaFluor Yellow 610
• NovaFluor Yellow 660
• NovaFluor Yellow 690
• NovaFluor Yellow 700
• NovaFluor Yellow 730
• NovaFluor Yellow 810
• PE
• PE-Cyanine5
• PE-Cyanine7
• PerCP-eFluor 710
• Super Bright 436
• Super Bright 600
• Super Bright 645
• Super Bright 702
• Super Bright 780
• Request custom conjugation

Excitation/Emission Max

499/520 nm View spectra

Form

Liquid

Concentration

5 µL/Test

Purification

Affinity chromatography

Storage buffer

PBS, pH 7.2, with 0.2% BSA

Contains

0.09% sodium azide

Storage conditions

4° C, store in dark, DO NOT FREEZE!

Shipping conditions

Ambient (domestic); Wet ice (international)

RRID

AB_10548030

Product Specific Information

Description: The OKT8 monoclonal antibody reacts with the human CD8a molecule, an approximately 32-34 kDa cell surface receptor expressed either as a heterodimer with the CD8 beta chain (CD8 alpha beta) or as a homodimer (CD8 alpha alpha). A majority of thymocytes and a subpopulation of mature T cells and NK cells express CD8a. CD8 binds to MHC class I and through its association with protein tyrosine kinase p56lck plays a role in T-cell development and activation of mature T cells. Preliminary testing indicates that OKT8 and two other mouse anti-human CD8 antibodies (clone RPA-T8, Product # 14-0088 and clone HIT8a, Product # 14-0089) do not compete with each other for binding to human peripheral blood leukocytes by flow cytometric analysis, suggesting that they do not bind to similar epitopes or block each other by steric hindrance.

Applications Reported: This OKT8 (OKT-8) antibody has been reported for use in flow cytometric analysis.

Applications Tested: This OKT8 (OKT-8) antibody has been pre-titrated and tested by flow cytometric analysis of normal human peripheral blood cells. This can be used at 20 µL (0.06 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.

Excitation: 488 nm; Emission: 519 nm; Laser: Blue Laser.

Filtration: 0.2 µm post-manufacturing filtered.

Target Information

Cluster of differentiation 8 (CD8), a type I transmembrane glycoprotein of the immunoglobulin family of receptors, plays an integral role in signal transduction, and T cell differentiation and activation. CD8 is predominantly expressed on T cells as a disulfide-linked heterodimer of CD8alpha and CD8beta, where it functions as a co-receptor, along with T cell receptor (TCR), for major histocompatibilty complex class I (MHC-I) molecules; whereas its counterpart, CD4, acts as a co-receptor for MHC-II molecules. CD8 exists on the cell surface, where the CD8alpha chain is essential for binding to MHC-I. CD8 is also expressed on a subset of T cells, NK cells, monocytes and dendritic cells as disulfide-linked homodimers of CD8alpha. Ligation of MHC-I/peptide complexes presented by antigen-presenting cells (APCs), triggers the recruitment of lymphocyte-specific protein tyrosine kinase (Lck), which leads to lymphokine production, motility and cytotoxic T lymphocyte (CTL) activation. Once activated, CTLs play a crucial role in the clearance of pathogens and tumor cells. Differentiation of naive CD8+ T cells into CTLs is strongly enhanced by IL-2, IL-12 and TGF-beta1.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.