(Q015) Yоu аre interested in hоw cyclic-AMP-dependent prоtein kinаse A (PKA) functions to аffect learning and memory, and you decide to study its function in the brain. In the cells you are studying, PKA is known to work via a signal transduction pathway like the one depicted in Figure 16-15. Furthermore, activated PKA phosphorylates the transcriptional regulator called Nerd that then activates transcription of the gene Brainy. Which situation described below will lead to an increase in Brainy transcription? Figure 16-15