It play a key part in the immune system . it could recognize bacterial membrane and then bind it to form holes which cause the content of cell leaked out and finally the death of the bacteria 它们具有特殊的分子结构，能够识别细菌的细胞膜并与之结合，能够在细胞膜上产生孔洞，而造成内容物的外泄作用，导致细菌的死亡。
