Let us review how a normal CD8+ T cell first recognizes an antigen-presenting cell and undergoes T cell activation. Below, draw two cells: a CD8+ T cell on the left and a professional antigen-presenting cell that it recognizes on the right. Include the proteins present on the surface of a normal naïve CD8+ T cell and the proteins on a cell it recognizes. Remember to include important co-stimulatory and signaling molecules involved in activating naïve T cells. Label proteins on the surface of both cells, and include the receptorassociated proteins that become phosphorylated during T cell activation.