Phospho-L-Tyrosine Disodium Salt

In biochemical research, Phospho-L-Tyrosine Disodium Salt serves as a critical reference standard for detecting tyrosine phosphorylation. It is used to calibrate quantitative assays such as Western blotting, ELISA, HPLC, and mass spectrometry, enabling accurate quantification of phosphotyrosine residues in cell lysates, purified proteins, or biological samples. Additionally, it acts as a specific substrate for tyrosine phosphatases (e.g., PTP1B, SHP-2) to evaluate phosphatase catalytic activity, kinetic parameters (Km, Vmax), and the efficacy of phosphatase inhibitors—facilitating high-throughput screening of potential modulators. It is also employed in signal transduction pathway studies, where it is added to cell cultures to simulate tyrosine phosphorylation events, helping researchers investigate downstream signaling cascades (e.g., PI3K/Akt, MAPK pathways) and verify the regulatory role of tyrosine phosphorylation in target proteins (e.g., EGFR, JAK2).

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