Yeast turning red (IMAGE) University of Copenhagen - Faculty of Science Caption "The yeast cell now emits a signal when there are cannabinoids in the yeast cell's environment. This allows us to screen thousands of plants for substances with therapeutic potential. And we can also investigate whether people are on drugs or whether someone is trying to smuggle illegal cannabinoids or “designer drugs” through an airport checkpoint," explains Professor Sotirios Kampranis. Credit Sotirios Kampranis Usage Restrictions None License Original 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.