منابع مشابه
Early limb development of Xenopus laevis.
This investigation has used histological techniques and the scanning electron microscope to establish the presence of an apical ectodermal ridge in the developing limbs of Xenopus laevis. The ridge appeared at stage 50, reached its maximal size at stage 51, and subsequently disappeared by stage 53. The course of the ridge was consistently related to a marginal sinus in the underlying mesenchyme...
متن کاملRegional specification within the mesoderm of early embryos of Xenopus laevis.
We have further analysed the roles of mesoderm induction and dorsalization in the formation of a regionally specified mesoderm in early embryos of Xenopus laevis. First, we have examined the regional specificity of mesoderm induction by isolating single blastomeres from the vegetalmost tier of the 32-cell embryo and combining each with a lineage-labelled (FDA) animal blastomere tier. Whereas do...
متن کاملConfocal imaging of early heart development in Xenopus laevis.
Xenopus laevis provides a number of advantages to studies on cardiovascular development. The embryos are fairly large, are easy to obtain, and can develop at ambient temperature in simple buffer solutions. Although classic descriptions of heart development exist, the ability to use whole-mount immunohistochemical methods and confocal microscopy may enhance the ability to understand both normal ...
متن کاملChromosome replication in early development of Xenopus laevis.
Eggs of Xenopus laevis contain exceptionally large amounts of materials involved in chromosome replication. This maternal stockpile allows an embryo to produce about 80 000 cells in less than 24 h. The adaptations which achieve this involve the mechanisms of both DNA replication and chromatin assembly.
متن کاملDeep cytoplasmic rearrangements during early development in Xenopus laevis.
The egg of the frog Xenopus is cylindrically symmetrical about its animal-vegetal axis before fertilization. Midway through the first cell cycle, the yolky subcortical cytoplasm rotates 30 degrees relative to the cortex and plasma membrane, usually toward the side of the sperm entry point. Dorsal embryonic structures always develop on the side away from which the cytoplasm moves. Details of the...
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ژورنال
عنوان ژورنال: The Scientific World JOURNAL
سال: 2003
ISSN: 1537-744X
DOI: 10.1100/tsw.2003.54