Protein kinase C
Protein kinase C (PKC) is a molecule that can phosphorylate certain targetted proteins by adding one or more phosphate groups, this will either activate or deactivate the targeted protein. PKC is a serine/threonine protein kinase which is called protein kinase C because it is calcium (Ca2+) dependant [1]. PKC is involved in many second messenger cell signalling pathways and during these pathways it moves from the cytosol to the the cytosolic side the the cell surface membrane in order to phosphorylate the appropriate protein in the pathway [2].