Fig. 10From: Gene expression profiles at different stages for formation of pearl sac and pearl in the pearl oyster Pinctada fucataSEM images illustrating microstructural characterization of the pearl layers at (a) 1 month and (b) 3 months of grafting. nu: nucleus, o: organic layer indicated by black arrow, p: heterogeneous prismatic layer, na: nacreous layer. Uppercase letter A-D indicates different pearls. Scale bars: 10 μmBack to article page