Biolegend, 100788, Spark YG™ 570 anti-mouse CD8a Antibody, 100μg

CD8, also known as Lyt-2, Ly-2, or T8, consists of disulfide-linked α and β chains that form the α(CD8a)/β(CD8b) heterodimer and α/α homodimer. CD8a is a 34 kD protein that belongs to the immunoglobulin family. The CD8 α/β heterodimer is expressed on the surface of most thymocytes and a subset of mature TCR α/β T cells. CD8 expression on mature T cells is non-overlapping with CD4. The CD8 α/α homodimer is expressed on a subset of γ/δ TCR-bearing T cells, NK cells, intestinal intraepithelial lymphocytes, and lymphoid dendritic cells. CD8 is an antigen co-receptor on T cells that interacts with MHC class I on antigen-presenting cells or epithelial cells. CD8 promotes T cell activation through its association with the TCR complex and protein tyrosine kinase lck.
100μg
Verified Reactivity: Mouse
Antibody Type: Monoclonal
Host Species: Rat
Immunogen: Mouse thymus or spleen
Formulation: Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide
Preparation: The antibody was purified by affinity chromatography and conjugated with Spark YG™ 570 under optimal conditions.
Concentration: 0.5 mg/mL
Storage & Handling: The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.
Application: IHC-F - Quality tested
Recommended Usage: Each lot of this antibody is quality control tested by immunohistochemical staining on frozen tissue sections. For immunohistochemistry, a concentration range of 5 - 10 µg/mL is suggested. It is recommended that the reagent be titrated for optimal performance for each application.
Excitation Laser: Green Laser (532 nm)/Yellow-Green Laser (561 nm)
Application Notes: Clone 53-6.7 antibody competes with clone 5H10-1 antibody for binding to thymocytes3. The 53-6.7 antibody has been reported to block antigen presentation via MHC class I and inhibit T cell responses to IL-2. This antibody has also been used for depletion of CD8a+ cells. Additional reported applications (for the relevant formats) include: immunoprecipitation1,3, in vivo and in vitro cell depletion2,10,15, inhibition of CD8 T cell proliferation3, blocking of cytotoxicity3,4, immunohistochemical staining5,6 of acetone-fixed frozen sections and zinc-fixed paraffin-embedded sections, and spatial biology (IBEX)29,30. Clone 53-6.7 is not recommended for immunohistochemistry of formalin-fixed paraffin sections. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays or in vivo studies (Cat No. 100746).
Application References(PubMed link indicates BioLegend citation): Ledbetter JA, et al. 1979. Immunol. Rev. 47:63. (IHC, IP) Hathcock KS. 1991. Current Protocols in Immunology. 3.4.1. (Deplete) Takahashi K, et al. 1992. P. Natl. Acad. Sci. USA 89:5557. (Block, IP) Ledbetter JA, et al. 1981. J. Exp. Med. 153:1503. (Block) Hata H, et al. 2004. J. Clin. Invest. 114:582. (IHC) Fan WY, et al. 2001. Exp. Biol. Med. 226:1045. (IHC) Shih FF, et al. 2006. J. Immunol. 176:3438. (FC) Kamimura D, et al. 2006. J. Immunol. 177:306. Bouwer HGA, et al. 2006. P. Natl. Acad. Sci. USA 103:5102. (FC, Deplete) Kao C, et al. 2005. Int. Immunol. 17:1607. PubMed Ko SY, et al. 2005. J. Immunol. 175:3309. (FC) PubMed Rasmussen JW, et al. 2006. Infect. Immun. 74:6590. PubMed Lee CH, et al. 2009. Clin. Cancer Res. PubMed Geiben-Lynn R, et al. 2008. Blood 112:4585. (Deplete) PubMed Kingeter LM, et al. 2008. J. Immunol. 181:6244. PubMed Guo Y, et al. 2008. Blood 112:480. PubMed Andrews DM, et al. 2008. J. Virol. 82:4931. PubMed Britschqui MR, et al. 2008. J. Immunol. 181:7681. PubMed Kenna TJ, et al. 2008. Blood 111:2091. PubMed Jordan JM, et al. 2008. Infect. Immun. 76:3717. PubMed Todd DJ, et al. 2009. J. Exp. Med. 206:2151. PubMed Bankoti J, et al. 2010. Toxicol. Sci. 115:422. (FC) PubMed Medyouf H, et al. 2010. Blood 115:1175. PubMed Riedl P, et al. 2009. J. Immunol. 183:370. PubMed Apte SH, et al. 2010. J. Immunol. 185:998. PubMed Bankoti J, et al. 2010. Toxicol. Sci. 115:422. (FC) PubMed del Rio ML, et al. 2011. Transpl. Int. 24:501. (FC) PubMed Cui L, et al. 2015. J Control Release. 206:220. PubMed Radtke AJ, et al. 2020. Proc Natl Acad Sci U S A. 117:33455-65. (SB) PubMed Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed
RRID: AB_2860588 (BioLegend Cat. No. 100787) AB_2860589 (BioLegend Cat. No. 100788)
Structure: Ig superfamily, CD8α chain, 34 kD
Distribution: Most thymocytes, T cell subset, some NK cells, lymphoid dendritic cells
Function: Co-receptor for TCR
Ligand/Receptor: MHC class I molecule
Antigen References: 1. Barclay A, et al. 1997. The Leukocyte Antigen FactsBook Academic Press. 2. Zamoyska R. 1994. Immunity 1:243. 3. Ellmeier W, et al. 1999. Annu. Rev. Immunol. 17:523.
Gene ID: 12525
UniProt: View information about CD8alpha on UniProt.org
Clone: 53-6.7
Regulatory Status: RUO
Other Names: T8, Lyt2, Ly-2
Isotype: Rat IgG2a, κ