The sperm were harvested from caudal epididymides of 8-week-old Tmem232-/- and wild-type adult male mice, and subjected to LC-MS/MS analysis.The total proteins of 5,199 were identified and 4,380 of them were quantified. Results showed that 385 differentially expressed proteins were identified including 88 up-regulated and 255 down-regulated genes (Fold Change≥1.5, P<0.05), and group comparisons were presented in a volcano plot.