摘要
Two recent studies have discovered a surprising link between three seemingly different clinical diseases:one that destroys bone marrow,another that prevents sun damage from being repaired,and a third which causes children to show signs of aging extremely early.It has been found that all three diseases are caused by mutations in the same gene.Mutations come in a number of different flavors,
Two recent studies have discovered a surprising link between three seemingly different clinical diseases： one that destroys bone marrow, another that prevents sun damage from being repaired, and a third which causes children to show signs of aging extremely early. It has been found that all three diseases are caused by mutations in the same gene. Mutations come in a number of different flavors, with effects ranging from no consequence to catastrophic failure or entirely new functions. Mutations range from the humble point mutation, in which a single DNA ＂base＂ is altered or removed;
