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Integrin-mediated cellular adhesion to components of the extracellular matrix (ECM) is important in a number of morphogenetic events that occur during vertebrate embryogenesis. Recent studies suggest that the focal adhesion kinase pp125FAK is involved in the regulation of integrin-dependent signaling processes triggered by cell adhesion to the ECM. We(More)
During embryogenesis cells modulate their adhesion to other cells and the surrounding extracellular matrix, in part, through the combination of integrins they express. In order to identify integrins that may mediate morphogenetic cell movements in the early Xenopus embryo, we have used polymerase chain reaction methods to isolate cDNAs encoding Xenopus(More)
TGF-beta family signalling pathways are important for germ layer formation and gastrulation in vertebrate embryos and have been studied extensively using embryos of Xenopus laevis. Activin causes changes in cell movements and cell adhesion in Xenopus animal caps and dispersed animal cap cells. Rho family GTPases, including rac, mediate growth factor-induced(More)
The Rho family of small GTP-binding proteins are important signaling molecules that regulate the dynamics of the actin cytoskeleton and mediate changes in cell morphology and motility. Here, we describe the temporal and spatial patterns of expression of the Rho family member, rac, during the development of the amphibian, Xenopus laevis. We also present the(More)
Many marine organisms spend the early part of their lives as larvae suspended in the water column before metamorphosing into benthic reproductive adults. Metamorphosis does not occur until a larva has become competent to respond to appropriate stimuli and after a suitable habitat for the young juvenile has been encountered. The gaseous neurotransmitter(More)
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