Fig. 1. The expression of C-type natriuretic peptide (CNP)/natriuretic peptide receptor 2 (NPR2) at different postnatal stages of testes. (A) The expression of CNP/NPR2 mRNA in testes and Leydig cells. (B, C) The location by immunohistochemistry (×200) and expression by Western blot of NPR2 in testes and Leydig cells. (D) The expression of CNP at mouse different postnatal stages of testes. (E) The expression of NPR2 at mouse different postnatal stages of testes. The β-actin was used as internal control. The data are presented as the mean±standard error of mean of three independent experiments. Bars with different letters are significantly different (p<0.05).