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Expression of NHE8 isoform mRNA in homogenate of renal cortex in young (3 months) and aging (18 months) rats. a Ethidium bromide-stained 1.5% agarose gel of NHE8 (443 bp) and GADPH (625 bp) PCR products. b Densitometric measurements. The amount of NHE8 mRNA in each sample was divided by the normalisation factor (GADPH) of the sample. Data are presented as means ± SEM. * P< 0.05 vs 3 months old
