Expression of KIR2DL1 on the entire NK cell population: a possible novel immunodeficiency syndrome

The killer immunoglobulin-like receptor (KIR) family recognizes class I major histocompatibility complex (MHC) molecules and inhibits natural killer (NK) activity. This family is highly polymorphic, and only some of the genes are present in each individual.[1][1] Thus, the frequency of a single