Nobel Media AB
The Nobel Prize: The Nobel Prize in Physiology or Medicine 1987: Susumu Tonegawa
This Nobel E-Museum site provides an autobiography and a very detailed description of Mr. Tonegawa's work for which he received the Nobel Prize in 1987.
Other
Dalhousie University: Antibodies
A very good explanation of what antibodies are and what their functions are. Includes a list of the different types of antibodies.