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Fig. S1 Effect of ESR1 on cxcr4b expression. (A) Repression of cxcr4b in all but the leading cells, in embryos injected with esr1 mRNA; the leading cells appear to move ventrally away from the horizontal myoseptum. (B) Complete extinction of cxcr4b expression after injection of ESR1 mRNA; the picture has been taken under Nomarski optics and contrast reinforced to outline the primordium.
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