Signal Transduction through phosphorylation and dephosphorylation of proteins in the cell is now a well-recognized mechanism involved in countless physiological and pathological processes. Consequently, the enzymes, known as protein kinases, which catalyze the phosphorylation of proteins, are critical regulators of cellular events. One of these protein kinases is the protein kinase CK2 (also known as casein kinase 2) that has been implicated in multiple functions including control of cell growth and proliferation. CK2 is a protein serine/threonine kinase which is a highly conserved and...