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Fig. 3. Cs-Mesp is expressed transiently and specifically in (A) B7.5
blastomeres at the 110-cell stage, (B) their daughter cells (B8.9 and B8.10)
at the early to mid-gastrula stage, and (C) their granddaughter cells (B9.17,
B9.18, B9.19 and B9.20) at the late gastrula stage. (D) The expression is not
observed at the neurula stage. The signals are shown by arrows. Scale bar
represents 100 µm.