Prions (IMAGE) University of Massachusetts Amherst Caption Yeast colonies with the prion in a shape with a larger nucleation seed (white) than can be cured (red). Credit UMass Amherst/Serio lab Usage Restrictions None License Licensed content 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.