The monoclonal antibody 4A14B11 reacts with murine Ly49C, Ly49F, Ly49H, and Ly49I, members of the lectin-like homodimeric Ly49 family of cell surface receptors. Mouse Ly49 receptors exhibit allelic specificity for MHC class I Ia molecules and are thought to serve to prevent natural killer (NK) cells from attacking normal cells while allowing them to attack infected or transformed cells in which class I molecules have been downregulated. These inhibitory receptors are also expressed on a subpopulation of mouse CD8+ T cells. The 4A14B11 antibody stains ~90% of NK1.1+CD3- splenocytes and ~6% of CD8+ spleen cells from C57BL/6 mice. The antibody also stains 30-80% of NK1.1+CD3- splenocytes in other mouse strains tested (BALB/c, C3H, 129, SJL, AKR/J).

Cell Surface Flow Cytometry Staining Protocol

1. Corral L, Takizawa H, Hanke T, Jamieson AM, Raulet DH. A new monoclonal antibody reactive with several Ly49 NK cell receptors mediates redirected lysis of target cells. Hybridoma. 1999;18:359-66. (Immunogen, Cyto, FC)

2. Chung JW, Kim MS, Piao Z, Jeong M, Yoon SR, Shin N, et al. Osteopontin promotes the development of natural killer cells from hematopoietic stem cells. Stem Cells. 2008;26:2114-23. (FC)