Toll receptors belong to the family of receptors with a high evolutionary conservatism . They play an important role in the activation of insect resistance until wrodzonejod birds. For the first time been detected and characterized in Drosophila ( Drosophila melanogaster ) , where they are involved in embryogenesis and immunity against pathogens . We detected a homologous receptors in a mammal, including a human, which is called Toll -like receptors ( TLRs , Toll -Like Receptors ) .