Japan's 1st Nobel laureate in medicine Tonegawa dies at 86

WASHINGTON - Susumu Tonegawa, Japan's first recipient of the Nobel Prize in physiology or medicine and a longtime professor at the Massachusetts Institute of Technology, has died, the university said Wednesday. He was 86.

Tonegawa, who died Saturday, won the prize in 1987 for discovering "the genetic principle for the generation of antibody diversity."