In situ hybridization of GON-SJTU1 mRNA in rat testis. The slides of testis on day 1 (A), day 5 (B), day 60 (C) were analyzed using the DIG-labeled cRNAs probes specific for GON-SJTU1. The signals were observed in some germ cells (pointed with arrows). The negative control was also performed (D). Bar = 50 μm.