Used as a selective activator of cAMP-dependent protein kinase (PKA) in cellular signaling studies. It is membrane-permeable and resistant to phosphodiesterase degradation, making it ideal for prolonged activation of PKA in live cells. Commonly applied in research on signal transduction pathways related to metabolism, gene expression, and cell differentiation. Also used to investigate the role of PKA in neuronal function, cardiac regulation, and hormone responses. Its thioate modification enhances stability, allowing reliable and sustained intracellular cAMP mimicry in experimental models.