Fig. 5. Coordinated, cyclical gene expression in P8 Sertoli cells. In situ hybridisation on consecutive serial sections of P8 XXSxra testis with probes for Ctsl (A), Sgp2 (B), galectin 1 (C), Amh (E) and Rbpl (F). (D) Diagram of the section in C showing cord segments with relatively high levels of galectin 1 mRNA (filled areas and arrows in C). Corresponding cord segments are indicated by arrows in other panels, showing that the relative signal intensities for galectin 1 and Rbpl are inversely related to the levels of Ctsl, Sgp2 and Amh. Exposure times in days were 3 for Amh, galectin 1 and Sgp2, 6 for Ctsl and 19 for Rbpl.