CD95 recognises CD95L, B7-H6 interacts with NKp30, the Fc fractions of IgG antibodies are recognized by CD16 to activate the cytotoxicity of NK cells, as well as CD112 and CD155 (usually expressed in tumour cells), which are recognized by DNAM-1 (Table 1), whose interaction also promotes cytotoxicity and the generation of cytokines. This evidence concerns the gene FAS and neoplasm.