A gene gives a hint of how long a person might hope to live.

Reports on blood tests done at Rockefeller University which may predict when a person might die. The test identifying a protein produced by a gene known as apolipoprotein E (apo E); Researchers' assertion that apo E is rapidly emerging as the first-found of a set of mysterious genes that roughly determine how long a person will live; Three versions of the apo E gene and its protein.