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DNA is open to an onslaught of different phenomena that can generate defects in our genomes. UV radiation and molecules known as free radicals can cause damage. Furthermore, defects can arise when DNA is copied during cell division - a process that occurs millions of times each day in our bodies. To address those defects, a host of molecular systems continuously monitor and de-bug our genetic information. The three new laureates mapped in detail how some of these mechanisms worked. [Source: BBC News]
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