in addition , we find that phosphorylation of the epidermal growth factor receptor and of 80-kda and 22-kda proteins , as well as the tyrosine phosphorylation of a 42-kda protein , all proceed normally in the nonmitogenic variant , even though these phosphorylations must depend on the activation of different kinases .
C0031715
phosphorylations
C0031727
kinases