Amino acid response

Amino acid response (AAR) is the mechanism triggered in mammalian cells by amino acid starvation. The amino acid response pathway is triggered by shortage of any essential amino acid, and results in an increase in activating transcription factor ATF4, which in turn affect many process by sundry pathways to limit or increase the production of other...
Found on http://en.wikipedia.org/wiki/Amino_acid_response
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