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Synchrony of mitotic stages in SDS-equalized Dendraster embryos. (a) All 32 blastomeres simultaneously in metaphase of 6th division. (b) All blastomeres in metaphase or prophase at the 7th division. (c) Surfactant-treated embryo at 8th cleavage showing group of small interphase nuclei, similar to control micromeres. Bar equals 25 μm.
