FIG. 8.
Intracellular GSH concentrations measured by in vivo EPR using RSSR probe, and tissue GSH contents measured in vitro (see Materials and Methods section) in the normal mammary glands and mammary tumors (>4.5 cm3 volume) of female FVB/N mice (*P < 0.01, **P < 0.002). Error bars denote standard error.