Poly(ADP-ribose) (PAR) is synthesized from NAD + by PAR polymerases (PARPs) and regulates many physiological processes such as the maintenance of DNA integrity, gene expression and cell division.

In January 1993, a gunman murdered seven people in a fast-food restaurant in Palatine, a suburb of Chicago. In his dual roles as an administrative executive and spokesperson for the police department, ...

But Why is a show led by kids. They ask the questions and we find the answers. It’s a big interesting world out there. On But Why, we tackle topics large and small, about nature, words, even the end ...