Direct measurement of site-specific phosphorylation stoichiometry can unambiguously distinguish whether the degree of phosphorylation is regulated by upstream kinase/phosphatase activity or by transcriptional regulation to alter protein expression level. Here, we describe a motif-targeting quantitative proteomic approach that integrates dephosphorylation, isotope tag labeling, and enzymatic kinase reaction for large-scale phosphorylation stoichiometry measurement of the human proteome.
CITATION STYLE
Tsai, C. F., Ku, W. C., Chen, Y. J., & Ishihama, Y. (2017). Absolute phosphorylation stoichiometry analysis by motif-targeting quantitative mass spectrometry. In Methods in Molecular Biology (Vol. 1636, pp. 313–325). Humana Press Inc. https://doi.org/10.1007/978-1-4939-7154-1_20
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