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Temporal changes in gene expression (mean± SEM) of Ccl5, Cxcl9, Peg3, and Ube2c in kidney, lung, and liver of 3, 9, and 15 month old mice were measured by real-time PCR and normalized to 18S RNA. P values (ANOVA) in each panel show overall change in expression with age. The trend observed in all three organs was consistent with the expression microarray, but did not reach statistical significance in the liver for 3 genes.
