PP1 and PNUTS (image) Brown University Caption The enzyme PP1, the tan mass above, is everywhere in the body and has a role in nearly every biological process. That role is shaped more than 200 regulatory proteins that bind to PP1, including one called PNUTS, blue and pink above. Credit Page Lab/Brown University Usage Restrictions Please, credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.