Fig. 5. Cellular localisation of eSRS21 mRNA in the immature cultivated eel testis by in situ hybridisation. (A) Section hybridised with antisense probes. (B) Section hybridised with sense probes as a negative control. Sections were stained nuclei by 0.2% Methyl Green, metachromatically. G and S indicate germ cell and Sertoli cell, respectively. Scale bar: 10 µm.