article_snippet: closely mimics the kinds of mutations that occur naturally, for instance after chronic sun exposure.
article_snippet: Evolution has led to some of the most astonishing mechanisms for protecting organisms against their natural pathogens,' says Juan Carlos Izpisua Belmonte, a professor of Salk's Gene Expression Laboratory in California.
article_snippet: Pictured are the study team, from left: John Martlett, Juan Carlos Izpisua Belmonte, Hsin-Kai Liao, Yuta Takahashi, Concepcion Rodriguez Esteban, Tomoaki Hishida and Mo Li .