Different types of receptors expressed by natural killer(NK) cells may selectively recognize their specific ligands on some other cells and provi de self-regulatory signals to control NK responses.

• 自然杀伤细胞通过其表达的不同类型的受体选择性识别细胞表面的相应配体,提供自然杀伤细胞反应的自我调节信号。