. At late
and in tissues that derive from it. At
and auditory vesicle. The interactions of
were studied in vivo. In embryos ventralized by UV irradiation and suramin treatment,
expresses this gene. The patterning effect of
of embryos partially dorsalized with LiCl, which leads to the complete rescue of
structures. The experiments presented here argue that
. A model is proposed in which the timing of expression of various
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