KIR Ligand

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** The major histocompatibility proteins that are ligands for the killer-cell immunoglobulin-like receptors found on natural killer cells. Binding of these ligands to their cognate receptors plays a role in the activation of natural killer cells.

**Synonyms:** - Killer-Cell Immunoglobulin-Like Receptor Ligand