The 6A8.6F10.1A6 monoclonal antibody reacts with the Qa-1[b] alloantigen, which is a nonclassical MHC class I (Class Ib) molecule encoded by the T23 gene of the H-2 complex. Qa-1 associates with β2-microglobulin and is expressed at low levels on most leukocytes and many other cell types. Its level of cell-surface expression is upregulated by IFNγ or specific peptides. Qa-1 is an oligomorphic molecule which presents a limited pool of peptides to T lymphocytes bearing αβ and γδTCR and binds to a large subpopulation of NK cells. In fact, Qa-1[b] is the ligand for CD94/NKG2A, CD94/NKG2C, and CD94/NKG2E receptors, which are expressed on NK cells. Furthermore, it has been reported that Qa-1 expressed on activated B lymphocytes is involved in immunoregulation by inducing T-cell-mediated suppression of antibody responses. The 6A8.6F10.1A6 mAb can detect Qa-1[b] on activated splenocytes from C57BL/6 and BALB/c mice (both Qa-1[b]), but not from A/j mice (Qa-1[a]), and it can block target cell recognition by CTLs specific for Qa-1-presented antigen.
This product contains Sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
Conseil sur la manipulation
The antibody was conjugated with biotin under optimum conditions, and unreacted biotin was removed.
Stock
4 °C
Stockage commentaire
Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.
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Sivakumar, Gunturi, Salcedo, Schatzle, Lai, Kurepa, Pitcher, Seaman, Lemonnier, Bennett, Forman, Kumar: "Cutting edge: expression of functional CD94/NKG2A inhibitory receptors on fetal NK1.1+Ly-49- cells: a possible mechanism of tolerance during NK cell development." dans: Journal of immunology (Baltimore, Md. : 1950), Vol. 162, Issue 12, pp. 6976-80, (1999) (PubMed).
Vance, Kraft, Altman, Jensen, Raulet: "Mouse CD94/NKG2A is a natural killer cell receptor for the nonclassical major histocompatibility complex (MHC) class I molecule Qa-1(b)." dans: The Journal of experimental medicine, Vol. 188, Issue 10, pp. 1841-8, (1999) (PubMed).
Noble, Zhao, Cantor: "Suppression of immune responses by CD8 cells. II. Qa-1 on activated B cells stimulates CD8 cell suppression of T helper 2 responses." dans: Journal of immunology (Baltimore, Md. : 1950), Vol. 160, Issue 2, pp. 566-71, (1998) (PubMed).
Soloski, DeCloux, Aldrich, Forman: "Structural and functional characteristics of the class IB molecule, Qa-1." dans: Immunological reviews, Vol. 147, pp. 67-89, (1996) (PubMed).
Antigène
H2-T23
(Histocompatibility 2, T Region Locus 23 (H2-T23))