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The Prestin and Pgrn gene expression difference in different genotypes of mice of different age (A is the electrophoresis of Prestin and Pgrn gene. B is the relative expression of Prestin gene. C is the relative expression of Pgrn gene. ** means that the difference is very significant compared with the Spag6+/+ mouse (P < 0.01); compared with the 30-day old Spag6−/− mouse, the difference is very significant (P < 0.01)).
