EGF (and indeed FGF, PDGF and NGF) stimulation results in CBL phosphorylation on Tyr-371. Phosphorylation is necessary for CBL to exhibit ubiquitin ligase activity.
Langdon, WY, Schlessinger, J, Galisteo, ML, Dikic, I, Batzer, AG
Kassenbrock, CK, Anderson, SM
protein tyrosine kinase activity of EGF-like ligands:p-6Y-EGFR:CBL [plasma membrane]
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