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Proline rich protein tyrosine kinase (Pyk2) is a focal adhesion kinase (FAK2) related protein kinase protein also known as cell adhesion kinase (CAK ), related adhesion focal tyrosine kinase (RAFTK), or calcium-dependent PTK (CADTK) (3.4). Highly expre ed in the nervous system, protein tyrosine kinase (Pyk2) is phosphorylated on the tyrosine residue by a variety of G-protein-coupled receptors & extracellular signals that increase the level of Ca+ intracellulary (1,2)