The mammalian target of rapamycin (mTOR) controls cell growth and size. Amino acids are known to activate TOR, and Rag (Ras-related GTP-binding protein) GTPases have now been found to act as their effectors.
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Meijer, A., Codogno, P. Nutrient sensing: TOR's Ragtime. Nat Cell Biol 10, 881–883 (2008). https://doi.org/10.1038/ncb0808-881
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DOI: https://doi.org/10.1038/ncb0808-881
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