👉 A calliopes is a type of protein found in human cells that plays an important role in regulating blood pressure and other physiological processes. The exact mechanism behind how this protein works has not been fully understood, but it has been suggested that it may have a role in reducing the risk of hypertension or high blood pressure. In humans, the protein called G-protein-coupled receptor (GPCR) is involved in the signaling between cells and other proteins, which can lead to changes in blood pressure