Tyrosine kinases are a family of enzymes that catalyze the transfer of a phosphate group from ATP to a tyrosine residue in a protein. This process, known as phosphorylation, is a crucial step in many cellular processes including growth, differentiation, and metabolism. Tyrosine kinases can be categorized as either receptor tyrosine kinases (RTKs) or non-receptor tyrosine kinases (NRTKs), depending on their location and function.
