immunocal glutathione precursor whey protein isolate with cysteine Bundle K-21 Immunocal Classic (Blue) Regular Glutathione

When cellular serine levels decrease, it activates one of the main effectors of the mTOR transcription factor, activating transcription factor 4 (ATF4), which then promotes the expression of serine synthesis pathway (SSP) enzymes to bring the serine level back to normal [71]

J.Fotuhi SiahpiraniA.KemmererZ

Foyer et al

2.5 Determination of metabolite levels and oxygen consumption in isolated mitochondria To determine levels of KC metabolites, mitochondria (10 mg protein/mL) were incubated at 37C in KME buffer plus 5 mM Pi, 0.2 mM ADP and one of the following substrates: 2 mM Pyr plus 5 mM Mal, 4 mM glutamine, 10 mM 2-oxo or 5 mM Suc plus 2 M rotenone for 10 min under orbital shaking at 150 rpm