These two cells are two different types of cells. So killoty cells are responsible for using their protein, their membrane bound protein found on the cell membrane to basically seek out specific types of pathogens and kill off those pathogens by releasing a special type of chemical into those pathogen cells. Now, what about memory T cells? Well, memory T cells basically function the same way that memory B cells function. They help protect us from reinfection. And finally, we have suppressor cells and these suppressor cells are responsible for suppressing and regulating our immune system.