Without this protein, coffee wouldn't work

August 15, 2002 Posted: 0834 GMT

By Bill Davis
Special to CNN.com

(CNN) -- A cup of coffee can keep you awake for a long time, and scientists think they know why. Researchers have discovered a new function of a protein that intensifies the caffeine kick.

In a study published in Wednesday's issue of the journal Nature, researchers describe a new role for the protein DARPP-32. This protein is found in mouse brains, and a similar version is found in humans. This work explains how coffee gives us a buzz.

More...