Progressive determination of cell fates
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J. J. Henry; R. A. Raff
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Article
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1994
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Springer-Verlag
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English
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In the direct-developing sea urchin Heliocidaris erythrogramma the first cleavage division bisects the dorsoventral axis of the developing embryo along a frontal plane. In the two-celled embryo one of the blastomeres, the ventral cell (V), gives rise to all pigmented mesenchyme, as well as to the ve