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Fig. 8. Effect of a MEK inhibitor, U0126, on the expression of HrzicN and HrBra. (A-D) Embryos cultured in Millipore-filtered seawater containing 2 µM U0126. (E-H) Control embryos cultured in Millipore-filtered seawater containing 0.02% DMSO. Expression of HrzicN (A,B,E,F) and HrBra (C,D,G,H). (A,C,E,G) 76-cell stage embryos. (B,D,F,H) Middle gastrula equivalent stage embryos. All specimens, vegetal view.