Amino acids induce peptide uptake via accelerated degradation of CUP9, the transcriptional repressor of the PTR2 peptide transporter.
Xia Z, Turner GC, Hwang CS, Byrd C, Varshavsky A
J Biol Chem. 2008 Oct 24;283(43):28958-68. doi: 10.1074/jbc.M803980200. Epub 2008 Aug 15.
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