Control of cleavage cycles in Drosophila embryos by frühstart.

Abstract excerpt

Early metazoan development consists of cleavage stages characterized by rapid cell cycles that successively divide the fertilized egg. The cell cycle oscillator pauses when the ratio of DNA and cytoplasm (N/C) reaches a threshold characteristic for the species. This pause requires maternal factors as well as zygotic expression of as yet unknown genes. Here we isolate the zygotic gene frühstart of Drosophila and...

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