Figure: Diagram of the research results (IMAGE) Kobe University Caption <b>cAMP (cyclic AMP):</b> An intracellular signaling molecule that regulates a variety of cellular functions such as insulin secretion. <b>PKC (Protein Kinase C):</b> An enzyme that adds phosphoric acid to proteins (phosphorylation), thereby regulating various intracellular signals such as insulin secretion. Credit Adapted version of the Graphical Abstract in the JCI paper (DOI: 10.1172/JCI140046) Usage Restrictions Please credit. 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.