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Kinase-active RAF1 phosphorylates MAP2K1. 1 / 1
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"acti-Fig. 3. PKCb in insulin signal-ing. Insulin-stimulated insulin receptor (IR) phosphorylates IRS1. IRS1 recruit various signaling molecules through SH2-phos-photyrosine interactions. IRS1-binding proteins containing an SH2 domain include Grb2, PI3K, SHP-2, and Nck. Insulin-induced ERK activation in L6 myocytes occurs largely through Raf-1 rather than Ras activation. In contrast, EGF-induced ERK acti-vation is dependent on Grb2/Sos-mediated Ras activation."