Ultrastructural features of ectodermal--mesenchymal relationships in the developing limb of Xenopus laevis.

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...

Expression of hsp90 Alpha and hsp90 Beta during Xenopus laevis Embryonic Development

Background: Members of the eukaryotic Hsp90 family function as important molecular chaperones in the assembly, folding and activation of cellular signaling in development. Two hsp90 genes, hsp90 alpha and hsp90 beta, have been identified in fish and homeothermic vertebrates but not in poikilothermic vertebrates. In the present study, the expression of hsp90 alpha and hsp90 beta genes in Xenopus...

CIGARETTE SMOKE/ETHANOL-INDUCED LIMB DEFECTS IN MOUSE EMBRYOS

We have produced a spectrum of limb defects in developing mouse embryos by exposing the mother to smoke from cigarettes with different nicotine concentrations, ethanol, and a combination of ethanol and cigarette smoke. The critical time of exposure was determined to be during day 10 of gestation (vaginal plug=day 0). This time is prior to the critical events which occur between the apical e...

The S362A mutation block ROMK2 (Kir1.1b) endocytosis in Xenopus laevis oocyte membrane .

Abstract The S362A mutation block ROMK2 (Kir1.1b) endocytosis in Xenopus laevis oocyte membrane . Saeed Hajihashemi1 , 1-Assistant professor, PhD in Physiology, Department of Physiology, School of Medical science, Arak University of Medical Sciences. Introduction: ROMK channel is localized on the apical membrane of the nephron. Recent studies suggest that endocytosis of ROMK chan...

ترتیب اعصای جانبی در دم لارو of Xenopus laevis