But basically the calmodulen looks like this. It looks like a hand and it has a side, a pocket that binds that calcium. And once it binds the calcium, it forms the calcium calmodulent complex. And this complex can go on and stimulate the activity of different types of protein kinases. And remember, protein kinases phosphorylate and activate target enzymes and proteins. Now, the other thing that the calcium mines can do is they can go on and bind onto a specific type of kinase found on a membrane, on the intracellular side of the cell membrane known as protein kinase C. When the calcium binds onto protein kinase C, it basically creates a pocket that allows the dag.