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. 2011 Jan 14;6(1):e16212. doi: 10.1371/journal.pone.0016212

Figure 5. Increased serum corticosterone response to immobilization stress in different genotypes.

Figure 5

Serum samples were collected from stressed and non-stressed control of wild type, Per1 mutant and Per2 mutant mice, and assayed with the corticosterone ELISA kit. Data shown represent the mean ± SEM of 4 animals from several independent experiments for each data point. The asterisks (*, p<0.05; **, p<0.01, one way ANOVA) indicate in each genotype, the significant differences of corticosterone level between the stressed mice and the non-stressed mice.