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For the quantification of sulfur metabolites in the tissue samples, the tissue metabolites were extracted and derivatized with NEM in ice-cold extraction solvent (80% MeOH: 20% H 2 O containing 25 mM NEM and 10 mM ammonium formate, pH=7.0) which includes stable isotope labeled internal standards (20 M [ 13 C 3 , 15 N]-cysteine-NEM, 36.4 M [ 13 C 2 , 15 N]-GSH-NEM, 10 M [D 4 ]-Cystine, 0.92 M [ 13 C 5 , 15 N 2 ]-GSSG, 20 M [D 4 ]-Hypotaurine, and 20 M of [ 13 C 2 ]-Taurine at a final concentration of 50 mg/mL followed by incubation on 4 C for 24 hr
In addition, it has been reported that HSYA can inhibit the proliferation and migration abilities of HepG2, Hep3B and SMMC7721 cells, and induce the apoptosis of HepG2 cells by blocking PI3K/Akt signaling pathway (Song L
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