2013 年 77 巻 4 号 p. 839-842
Phosphorylation of eukaryotic initiation factor 4E-binding protein 1 (4E-BP1) and 70-kDa ribosomal protein S6 kinase (S6K1) in the rat liver increased in proportion to the amount of leucine administered, ranging from 0.169 to 1.35 g/kg of body weight. In the skeletal muscle, phosphorylation of these factors reached a plateau at 0.675 g/kg of body weight. The sensitivity of mammalian target of rapamycin (mTOR) signaling to leucine in the skeletal muscle appeared to be higher than that in the liver.
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