CD160 antigen is a Lipid-anchor that exists as a disulfide-linked homomultimer. CD160 contains one Ig-like V-type domain. The human CD160 precursor is a cysteine-rich, glycosylphosphatidylinositol-anchored protein of181 amino acids with a single Ig-like domain. It is weakly homologous to KIR2DL4. CD160 is expressed in thespleen, peripheral blood, and small intestine. Its expression is tightly associated with peripheral blood NK cellsand CD8 T lymphocytes with cytolytic effector activity. CD160 is a receptor showing broad specificity for bothclassical and non-classical MHC class I molecules.