text: Israelis, American Win Nobel for Chemistry STOCKHOLM, Sweden - Israelis Aaron Ciechanover and Avram Hershko and American Irwin Rose won the 2004 Nobel Prize in chemistry Wednesday for discovering a key way cells destroy unwanted proteins - starting with a chemical "kiss of death."   Their work provides the basis for developing new therapies for diseases such as cervical cancer and cystic fibrosis.    The Royal Swedish Academy of Sciences honored Ciechanover, 57, Hershko, 67, and Rose, 78, for work they did in the late 1970s and early 1980s...