Fig. 2
From: cAMP-PKA/EPAC signaling and cancer: the interplay in tumor microenvironment
Representative substrates of PKA. PKA can phosphorylate a number of proteins including kinases, phosphatases, transcription factors, receptors, ion channels, etc. Phosphorylation of these substrates by PKA may either enhance (red font) or inhibit (black font) their activities. The phosphorylation sites in these substrates are shown. *, The phosphorylation site is undefined