An enzyme called telomerase plays a significant role in aging and most cancers.  Telomerase’s primary job is to maintain the DNA in telomeres, the structures at the ends of a person’s chromosomes that act like the plastic tips at the ends of shoelaces. When telomerase isn’t active, each time cells divide, the telomeres get shorter. When that happens, the telomeres eventually become so short that … Continue reading Study provides previously unseen structure of telomere-controlling enzyme.