(IMAGE) Doshisha University Caption Cross-regulation between cAMP/Ca2+ is a fundamental phenomenon in neurons. However, we do not know the precise details of cAMP dynamics. Now, researchers from Japan have developed a new fluorescent cAMP indicator that has led to invaluable insights on neuronal communication. Credit Naoto Saitoh from Doshisha Universityy Cannot be reused without permission Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.