Well, the sequence known as the consensus sequence is shown on the board. So basically, if the substrate molecule contains arginine, arginine, x, serene, three or three ending and y, where X is basically any small amino acid for instance glycine and y is basically any large hydrophobic amino acid. This is basically where that protein kinase will buy to and it will phosphorylate this target side, the serine or thyrionine. Now, of course, we can also change the arginine to lysine and that will also allow the protein kinase to bind onto this sequence. But if these are changed to Lysine, the Affidavit will not be as good as in the case where these two are arginine molecule arginine amino acids. So we see that the consensus sequence that is recognized by protein kinase A is shown to the left.