Figure 3: Effect of shikimic acid (ShA) on the expression of the Sipks (a) and Sisult (b) genes in zygotes, blastula, and gastrula cells of S. intermedius. The time of incubation with ShA is 8 days (all embryos of the control group (C) were at the pluteus stage). ShA concentrations tested: 1—0.1 mM, 2— 0.5 mM. * .