Insulin Signal Transduction Pathways
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Insulin initiates its pleiotropic effects by activating the insulin receptor tyrosine kinase to phosphorylate several intracellular proteins. Recent studies have demonstrated that phosphotyrosine residues bind specifically to proteins that contain src homology 2 (SH2) domains, and that this interaction mediates the regulation of multiple intracellular signaling pathways. This article reviews recent progress in elucidating the detailed pathways that lead from the insulin receptor to the ultimate biologic actions of insulin.
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