If you think today's political rhetoric is overheated, imagine what goes on inside a vertebrate embryo. There, two armies whose agendas are poles apart, engage in a battle with consequences much more dire than whether the economy will recover---- they are battling for whether you (or frogs or chickens) will have a forebrain. In a study published in the August 19 online edition of Genes & Development, Salk Institute investigators led by Greg Lemke, Ph.D...
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