Even on a good day, DNA is constantly getting damaged. Nicks, scratches, breaks: the delicate strands that carry life's genetic code take a beating as.
The delicate strands that carry life s genetic code take a beating as they jumble about in the course of their work. If left untreated, errors accumulate, with fatal consequences for the organism. This is where two key proteins come to the rescue: PARP acts as a marker for a trouble spot, allowing XRCC1 to zoom in and begin a repair.