Fig. 6. Electron microscopic labelling with anti-SCP3 serum in pachytene spermatocyte sections. (A,B) Two serial sections of the same spermatocyte. The sex body (XY) is recognisable by its high electron density. Inside the sex body, an axial structure (Ax) is labelled with gold grains (arrow), so is the dense plate (DP) (arrowheads). (C,D) Higher magnification of two serial sections of another spermatocyte. Gold grains appear on the axial structure (Ax) (arrows) and on the dense plate (DP) (arrowheads). Bars 0.5 µm in A,B; 0.2 µm in C,D.