Function
Lectin-like receptor for natural killer (NK) cells (PubMed:14707119, PubMed:15069013, PubMed:18713988). Can either inhibit or activate NK cell cytotoxic activity, depending on its binding partner (PubMed:14707119, PubMed:15069013, PubMed:18713988). Heterodimer formation with KLRI1 mediates NK cell inhibition whereas heterodimer formation with KLRI2 mediates NK cell activation (PubMed:18713988). Plays a role in allogeneic recognition by the immune system (PubMed:14707119, PubMed:15069013).