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Post Translational Modification

Phosphotyrosine is Critical Signal Transduction and Regulation

Phosphotyrosine is the phosphorylated version of the amino acid tyrosine, which results from the activation of intracellular protein kinases (e.g. via growth factors) during normal growth and development, well as in transformation and oncogenesis. Phosphorylation of histidine, serine, threonine and tyrosine residues acts as a signaling system to control many cellular signaling pathways.