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Showing 1 to 20 of 200 for “"Xenopus laevis"”.
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Endodermal Patterning in Xenopus laevis
… expressed endodermal genes in $\textit{Xenopus laevis}$, a classic embryological model organism. Here, I report the identification and characterisation of a dozen novel regionally expressed endoderm genes. At tailbud stages their expression patterns fall into three re-occurring domains, …
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The chromatic function in Xenopus Laevis
In few Amphibia is the extent of visible pigmentary effector activity as striking as in the case of the South African clawed toad. Nevertheless, there is no account on record of the phenomena of colour response in this species.
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FGF signaling in Xenopus laevis lens regeneration
The larvae of the frog Xenopus laevis is capable of regenerating lenses. In this re- generative process, the corneal tissue is capable of forming a lens after removal of the original lens, but the molecular mechanisms for this process is unknown. This dissertation examines the relationship between …
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Molecular Control of Lens Development in Xenopus Laevis
… during embryonic lens formation. In the anuran, Xenopus laevis, there is an alternative lens-forming process termed cornea-lens transdifferentiation. Considering that both lens-forming processes result in the same ultimate outcome, it begs the question: How related are the molecular events …
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Controlled ablation of rod photoreceptors in transgenic Xenopus laevis
… death in the retina, we generated transgenic X. laevis that expressed a novel form of caspase-9, with binding domains specific to the compound AP20187. We treated these transgenic animals with AP20187 and caused rod cell death by apoptosis in tadpoles and post metamorphic animals. Peak rod …
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Die Regulation der Pankreasentwicklung von Xenopus laevis durch Transkriptionsfaktornetzwerke
… bestimmt. Es wurde bereits beschrieben, dass in Xenopus laevis der Retinsäure (RA)- signalweg für die Entwicklung der dorsalen Pankreasanlage als auch für die endokrine Zelldifferenzierung bereits während der Gastrulation notwendig ist. Es wurde ebenfalls gezeigt, dass eine gemeinsame Expression …
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Estrogen Receptor Regulation of Xenopus Laevis Vitellogenin Gene Expression
The mechanism by which the Xenopus laevis estrogen receptor mediates the transcriptional response of the vitellogenin gene was investigated. The Xenopus estrogen receptor (XER) cDNA was cloned and sequenced. It could encode a protein of 66 Kd, which is approximately the same size as human and …
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De ontwikkeling van het ruggemerg van de klauwpad, Xenopus laevis
Contains fulltext : mmubn000001_02662110x.pdf (Publisher’s version ) (Open Access)
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Regulation der Neurogenese durch bHLH-O-Proteine in Xenopus laevis
… bHLH-O-Proteine besser zu verstehen, wurden in Xenopus neue Mitglieder der bHLH-O-Proteinfamilien in silico identifiziert und einige dieser Proteine näher charakterisiert.In dieser Arbeit konnte ein in Xenopus bisher noch nicht beschriebenes Hairy und E(spl) verwandtes Protein identifiziert …
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Funktionelle Rolle von HMGN-Proteinen während der Embryonalentwicklung von Xenopus laevis
… am Beispiel des südafrikanischen Krallenfroschs Xenopus laevis untersucht. Dabei wurde entdeckt, dass sowohl die Expression als auch die zelluläre Verteilung der HMGN Proteine entwicklungsspezifisch reguliert ist. Eine Manipulation der HMGN Proteinmengen während der Embryonalentwicklung führte zu …
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Receptors and signal transduction in the pars intermedia of Xenopus laevis
Contains fulltext : mmubn000001_157048519.pdf (Publisher’s version ) (Open Access)
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Regulation of Bidirectional Microtubule-Dependent Organelle Transport in Xenopus Laevis Melanophores
… system in which to study regulated transport is Xenopus laevis melanophores, which contain pigment-filled organelles termed melanosomes that can be aggregated to the perinuclear region or dispersed throughout the cytoplasm by the motor proteins kinesin-2, cytoplasmic dynein, and myosin V. While …
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Vital Dye Mapping of the Gastrula and Neurula of Xenopus Laevis
Made available in DSpace on 2014-12-14T16:11:05Z (GMT). No. of bitstreams: 1 7524338.pdf: 4227152 bytes, checksum: bb2a4d3e4821d7723ec6d405ec4a2773 (MD5) Previous issue date: 1975
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Mechanical mapping of lineage boundaries in the developing Xenopus laevis embryo
… the viscoelasticity of the developing *Xenopus laevis* embryo and compared mechanical maps to fate maps of the developing embryo found in literature, along with my own lineage tracing. First, I determined that the presence of the vitelline membrane obscures the mechanical properties of …
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Histological and morphological studies of the endocrine organs of xenopus laevis
Xenopus Laevis has provided, during the last ten years, the basis of a growing body of physiological enquiries initiated by Jolly's research on reflex action. Its viability in the laboratory and amenability to operative procedure in particular, make it a peculiarly suitable object for …
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Induction and patterning of the cement gland during Xenopus laevis embryogenesis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Biology, 1994.
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