Nanocage (IMAGE) Aarhus University Caption The figure shows a nanocage in which eight unique DNA molecules are mixed together. The nanocage has four functional elements that transform themselves in response to changes in the surrounding temperature. These transformations either close (1A) or open (1B) the nanocage. By exploiting the temperature changes in the surroundings, the researchers trapped an active enzyme called horseradish peroxidase (HRP) in the nanocage (1C). Credit Sissel Juul Usage Restrictions Credit to Sissel Juul 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.