
Small RNA profiles at different stages of spermatogenesis. (A) Size distribution of small RNAs in type A spermatogonia (A), pachytene spermatocytes (PS), and round spermatids (RS). (B) Distribution of percentages of piRNAs with a 5′U in length. (C) Distribution of piRNAs from 11 libraries in different categories. (D) Reads of three types of MRPRs in three cell types.










