Cloning an Army of T Cells for Immune Defense
View the animation to see how one type of immune cellthe helper T cellinterprets a message presented at the surface of the cell membrane. The message is an antigen, a protein fragment taken from an invading microbe. A series of events unfolds that results in the production of many clones of the helper T cell. These identical T cells can serve as a brigade forming an essential communication network to activate B cells, which make antibodies that will specifically attack the activating antigen.
4 min 20 sec