A surprising new study shows that too much of the DNA-repair gene EXO1 can actually damage DNA and promote cancer-like changes. Credit: Shutterstock Tumor suppressor genes are often viewed as the body's built-in defense system against cancer. They produce proteins that help maintain and repair DNA, reducing the chances that harmful mutations will accumulate. When these genes stop working properly or are present at low levels, cancer risk can rise. But new research suggests that having too much

Tag-uri: DNA