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Fig. 3. Consensus Fox-binding sites are necessary and sufficient for anterior
ectodermal expression. (A) Activity of various endogenous and
synthetic constructs containing Fox sites (red circles). Left: scheme of the
constructs tested. Right: histogram representing the percentage of embryos
with X-gal staining in different lineages. (B) Sequence of the 6-Fox
element artificial construct tested in A, with the Fox sites boxed.