Activated Ras protein bound to a cell membrane, illustration. The activated form of Ras contains a bound GTP (guanosine triphosphate, orange) in its active site. Ras proteins are involved in transmitting signals within cells, turning on genes involved in cell growth, differentiation and survival. Mutations in ras genes can lead to permanently activated proteins causing cells to subdivide without control, often leading to cancer.

- Image ID: M8NK46

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