A Protein That Helps Create Immortal Cells

Every time your cells divide, the "telomeres," or caps on the ends of your chromosomes, get a little shorter. Elderly creatures begin to suffer diseases of old age partly because their telomeres have become so short, and cellular division becomes difficult and error-prone. That's why telomeres are the subject of… » 8/25/08 10:30am 8/25/08 10:30am