Now, what about the T lymphocytes? So B lymphocytes and T lymphocytes basically look something like this. We have our membrane and on the membrane we have these different types of proteins that act as receptors for antigens. They can actually bind onto antigens found on cell membranes of bacterial cells or infected cells and that can essentially destroy those pathogens when these cells bind onto them. So we have four different types of T lymphocytes or T cells. So we have helper T cells, killer T cells, memory T cells and suppressor T cells.