Modulation of guanine nucleotides bound to Ras in NIH3T3 cells by oncogenes, growth factors, and the GTPase activating protein (GAP)

The mitogenic activity of membrane-associated tyrosine kinases such as Src and the PDGF receptor appear to depend on Ras function. Ras biochemical activity involves regulation of a GTP/GDP cycle and the GTPase activating protein (GAP). Recently, PDGF and v-Src have been shown to stimulate tyrosine p...

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