Killer cell lectin-like receptor subfamily A (KLRA, alternative nomenclature Ly49) is a gene cluster coding proteins from family Ly49, which are membrane receptors expressed mainly on the surface of NK cells and other cells of immune system in some mammals including rodents and cattle but not humans.
The KLRA gene cluster encodes receptors for the Ly49 family, predominantly found on NK cells and specific immune system cells in non-human mammals like rodents and cattle, but not present in human immune systems.