And when these receptors locate the specific type of antigen found on the infected cell, they bind, they form a complex. And once they form a complex, they begin to release these powerful proteins that drill holes in these infected cells and kill off those infected cells. And they can also release chemicals, these green dots that essentially call upon macrophages. And these macrophages basically come next to this infected cell and once the cell dies off the macrophage essentially engulfs that cell and breaks it down into different types of things. Now, two other types of cells that T lymphocytes can differentiate into our memory T cells that function in the same way as memory B cells and we can also form something called suppressor cells or suppressor T cells. And these cells are involved in using a negative feedback mechanism to essentially regulate and tone down our functionality of the immune system.