<unk>  is a family of C-type lectin receptors which are expressed predominantly on the surface of NK cells and a subset of CD8+ T-lymphocyte. These receptors stimulate or inhibit cytotoxic activity of NK cells, therefore they are divided into activating and inhibitory receptors according to their function.<unk>  recognize nonclassical MHC glycoproteins class I (HLA-E in human and Qa-1 molecules in the mouse).
CD94/NKG2
Fc receptor
IL-2 receptor
CD137
Fc receptor-like molecule
CD23
CD80
CDV3 