Well, one type of protein kinase is protein kinase A or PKA. So PKA is an enzyme that phosphorylates proteins on specific amino acids along that polypeptide chain. Now, when cyclic adenosine monophosphate allosterically activates PKA at a specific type of site on that PKA enzyme. PKA can then begin adding the phosphoryl group onto different types of enzymes using those ATP molecules. And PKA is involved for example in synthesizing glucose so that we can use that glucose as an energy source. Now, one example of a protein phosphatase enzyme is pte N which stands for phosphatase and tense and homolog.