GAPDH (Novus Biologicals, NB300-320, 1:1000 dilution) or -actin (Sigma-Aldrich, A5441, 1:2000 dilution) was measured as control
I have seen that the authors have been working for years on cancer, antioxidants, and specifically on glutathione
Glutathione protects cells from oxidative damage and supports the liver
Antioxidant therapeutics in parkinsons disease: current challenges and opportunities
Yearbook Medical Publ, Chicago, pp 185209 Rescigno A, Sanjust E, Montanari L, Sollai F, Soddu G, Rinaldi AC, Oliva S, Rinaldi A (1997) Detection of laccase, peroxidase, and polyphenol oxidase on a single polyacrylamide gel electrophoresis
& Hugonnet, J.-E