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Effects of BHB on ER stress in the liver of the aged rats. Western blotting was performed to detect the levels of the ER stress markers (p-PERK and p-IRE), and the downstream signal p-JNK. Western blot results from three independent experiments were quantified by densitometry. One-factor ANOVA was used to determine the significant differences. #p < 0.05, ##p < 0.01, ###p < 0.001 vs. young; *p < 0.05, **p < 0.001, ***p < 0.001 vs. old.
