Cell counts of partial embryos treated with MEK inhibitor.

<p>DMSO, the solvent of MEK inhibitor, was used as a control.</p><p>Cell counts and numbers of cell divisions are presented as mean ± s.e.m.</p><p>Conditions are highlighted in bold and italic letters when cell fate changes are expected.</p><p>Numbers of cell divisions are highlighted in bold and italic letters when a change in the number was observed.</p><p>Mch, mesenchyme. Mu, muscle.