Question: RTKs often work with a protein called Ras. Ras is a G protein, and is activated when it is bound to GTP . Recall that

RTKs often work with a protein called Ras. Ras is a G protein, and is activated when it is bound to GTP. Recall that G proteins are activated by GEFs, which help the G protein exchange GDP for GTP. Which of the following plays the role of a GEF in Ras signaling? Use the insulin pathway of Ras/MapK activation from the class slides to help you.

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