Abstract
There are many environmental DNA damaging agents, one of the most relevant being ultraviolet (UV) radiation, a component of sunlight. The main types of lesions formed by UV exposure are the cyclobutane pyrimidine dimers (CPDs) and 6-4 pyrimidine pyrimidone (6-4PPs) that, in most organisms, are efficiently repaired by specific photolyases for each type of lesion. However, such enzymes cann…